AFO Chromatography Domain Ontology (REC/2025/12)
A piece of apparatus that has the form of a tube with a diameter of less than a millimeter and hosts the stationary bed in chromatography. [CHMO]
An open-tubular column in which a porous layer, achieved by either etching a non-porous layer or by deposition of porous particles from a suspension, coats the inner wall and may serve as a support for a liquid stationary phase or as the stationary phase itself. [CHMO]
A chromatography column used for analysis. [Allotrope]
A piece of apparatus that is planar and is or hosts the stationary bed in chromatography. [CHMO]
PAC, 1993, 65, 819 (Nomenclature for chromatography (IUPAC Recommendations 1993))
A chromatography detector is a detector that is used in chromatography as component of a chromatography system. [Allotrope]
A chromatography column where the stationary phase is a strong anion exchanger. [CHMO]
A chromatography column where the stationary phase is a weak anion exchanger. [CHMO]
An open-tubular column in which a layer of porous particles deposited from a suspension coats the inner wall and serves as a support for a liquid stationary phase. [CHMO]
A chromatography column where the stationary phase is a strong cation exchanger. [CHMO]
A short protective chromatography column used to protect the main analytical column from damaging impurities that are injected into the instrument. [Allotrope]
A piece of apparatus, consisting of an eluent supply system, an injection or sampling system, a column containing a swollen gel, a detector and a data acquisition/processing system, that is used to carry out chromatographic separations. [CHMO]
A chromatography column where the stationary phase is a cation exchanger. [CHMO]
A chromatography column where the stationary phase is an anion exchanger. [CHMO]
A capillary electrophoresis column is a type of column that is used in capillary electrophoresis. [Allotrope]
A chromatography column in which either the inner tube wall or a liquid or active solid held stationary on the tube wall acts as the stationary phase and there is an open, unrestricted path for the mobile phase. [CHMO]
A chromatography column that contains a solid packing. [CHMO]
An array column is a column that contains multiple columns at the same time. [Allotrope]
A chromatography column where the stationary phase is a weak cation exchanger. [CHMO]
An open-tubular column in which the liquid stationary phase is coated on the unmodified smooth inner wall of the tube. [CHMO]
A chromatography column where the stationary phase is an ion exchanger. [CHMO]
A spin column is a column used for concentration of biological samples containing membranes for ultrafiltration. The solid phase is made up of silica to which the biological sample binds. [Allotrope]
L.S. Ettre, "Nomenclature for Chromatography", Pure & Appl. Chem. 1993, Vol. 65, No. 4, pp. 819-872
A device in which the sample is first introduced into a chamber (loop), temporarily isolated from the mobile phase system by valves, which can be switched to make an instantaneous diversion of the mobile phase stream through the chamber to carry the sample to the column. [IUPAC]
A device which directly introduces the sample into the mobile-phase stream. [IUPAC]
A column compartment is a compartment in a chromatography system where the columns are held. [Allotrope]
2019-04-01 Adding 'ro:location of' some 'af-e:chromatography column' breaks Hermit reasoner. [Allotrope]
A monolithic columns is a chromatography column where the stationary phase synthesized in place as a single lattice structure in the column. [Allotrope]
A chromatography data system is a data system that controls a chromatography system and processes data participating in a chromatography run. [Allotrope]
To deliver material is the function to transfer a material to or into a destination. [Allotrope]
To deliver mobile phase is the function to deliver material that is in a mobile phase role. [Allotrope]
A material separation function which is realized by chromatography. [Allotrope]
A chromatographic packing is a solid heterogeneous mixture consisting of a substrate and stationary phase used in a chromatographic separation. [Allotrope]
Chromatography in which separation is based mainly on differences between the solubility of the sample components in the stationary phase (gas chromatography), or on differences between the solubilities of the components in the mobile and stationary phases (liquid chromatography). [CHMO]
A chromatography method where the stationary bed is within a tube (of standard length 25 cm). The particles of the solid stationary phase or support coated with a liquid stationary phase may fill the whole inside volume of the tube (packed column) or be concentrated on or along the inside tube wall leaving an open, unrestricted path for the mobile phase in the middle part of the tube (open-tubular column). [CHMO]
Chromatography in which separation is based mainly on differences between the adsorption affinities of the sample components for the surface of an active solid. [CHMO]
A separation method where the components are distributed between two phases, one of which is stationary and polar, while the other is non-polar and moves in a definite direction. [CHMO]
2018-10-24 Moved to chromatography domain ontology, subclassed under loading [Allotrope]
2022-06-20 Subclassed under sample introduction [Allotrope]
Process of loading a sample into a chromatography system. [Allotrope]
A separation method where the components (in this case stereoisomers) are distributed between two chiral phases, one of which is stationary, while the other moves in a definite direction. [CHMO]
A chromatography method where the stationary phase is present as or on a plane. [CHMO]
2019-09-09 Moved under data transformation and fixed definition. [Allotrope]
Chromatography data processing is a data transformation on chromatograms. [Allotrope]
Chromatography where the mobile phase contains a compound (the displacer) more strongly retained than the components of the sample under examination. The sample is fed into the system as a finite slug. [CHMO]
A separation method where the components are distributed between two phases, one of which is stationary and non-polar, while the other is polar and moves in a definite direction. [CHMO]
Headspace chromatography is a type of chromatography that uses the gaseous headspace above a sample for analysis because very light volatiles can be efficiently partitioned as they diffuse to the gas volume above. [Allotrope]
Mixed-mode chromatography (MMC), or multimodal chromatography, refers to chromatographic methods that utilize more than one form of interaction between the stationary phase and analytes in order to achieve separation. [Wikipedia]
A chromatography method where the separation is based on the adsorption to membranes. [Allotrope]
2019-09-20 Changed definition. [Allotrope]
Mobile phase delivery is a process performed by a chromatography system in which the mobile phase is mixed and transported through the instrument for separation and detection. [Allotrope]
The relative retention calculation is a process of performing the mathematical ratio quantification of the time a substance and a standard that remain in the stationary phase of a chromatography process. [Allotrope]
Constant pressure mobile phase delivery is a mobile phase delivery process whereby the mobile phase is delivered by maintaining a constant pressure of the mobile phase. [Allotrope]
Constant flow rate mobile phase delivery is a mobile phase delivery process whereby the mobile phase is delivered by maintaining a constant flow rate of the mobile phase. [Allotrope]
constant flow rate mobile phase delivery
The length of a chromatography column bed. [Allotrope]
2020-06-22 Changed labels and definition. [Allotrope]
Column inner diameter is the inner diameter of a column. [Allotrope]
Orange Book: IUPAC Compendium of Analytical Nomenclature. Second Edition, Blackwell Scientific Publications, Oxford, 1987.
PAC, 1993, 65, 819. Nomenclature for chromatography (IUPAC Recommendations 1993)
Relative retention time is a ratio quality of the adjusted or net retention time of a component relative to that of a standard, obtained under identical conditions. [Allotrope]
The hold-up volume is the volume of the mobile phase required to elute a component the concentration of which in the stationary phase is negligible compared to that in the mobile phase. In other words, this component is not retained at all by the stationary phase. Thus, the hold-up volume is equal to the retention volume of an unretained compound. [IUPAC]
Retention volume is the volume of the mobile phase required to elute a component the concentration of which in the stationary phase is negligible compared to that in the mobile phase. In other words, this component is not retained at all by the stationary phase. Thus, the hold-up volume is equal to the retention volume of an unretained compound. The hold-up volume includes any volumes contributed by the sample injector, the detector, and connectors. In gas chromatography this term is also called the gas hold-up volume. The corrected gas hold-up volume is the gas hold-up volume multiplied by the compression (compressibility) correction factor. [IUPAC]
A bonded phase is the structure quality of a material that is covalently bonded to a substrate. [Allotrope]
A chromatography peak is a peak that results from a detector's response to the presence of an analyte in the mobile phase eluting from a column in chromatography. [Allotrope]
A plot of detector signal (e.g. ion count or absorbance) vs. retention time obtained from a column chromatography experiment where the mobile phase is a gas. [CHMO]
A mass chromatogram is a distribution function of a mass detector signal versus time of acquisition or versus volume of analyte. [Allotrope]
An electromagnetic radiation chromatogram is a distribution function of a electromagnetic radiation detector signal versus time of acquisition or versus volume of analyte. [Allotrope]
A plot of detector signal (e.g. ion count or absorbance) vs. retention time obtained from a chromatography experiment where the separation is caused by exclusion effects within the stationary phase and where the stationary phase is a swollen gel. [CHMO]
A plot of detector signal (e.g. ion count or absorbance) vs. retention time obtained from a chromatography experiment where the separation is caused by differences in molecular size. [CHMO]
An unretained peak is a peak which represents the detection result of a material entity which was not retained by a chromatography column. [Allotrope]
2020-03-20 Added quantification facet superclass. [Allotrope]
Retention time is a chromatography peak facet that indicates the elapsed time between the injection of the sample and the maximum detector response attributed to the peak (analyte band). [Allotrope]
A chromatography peak facet that denotes the retention time of the peak relative to some other specified reference peak. [Allotrope]
A relative retention time that quantitates the ratio of the retention time of the peak relative to some other specified reference peak. [Allotrope]
A relative retention time that quantitates the ratio of the adjusted retention time (corrected for hold-up time) of the peak relative to the adjusted retention time of some reference peak. [Allotrope]
A chromatography peak facet is a facet of a chromatography peak. [Allotrope]
2019-09-26 Removed alt labels, now their own subclasses. [Allotrope]
PAC, 1990, 62, 2167 (Glossary of atmospheric chemistry terms (Recommendations 1990))
The portion of the chromatogram recording the detector response when only the mobile phase emerges from the column. [IUPAC]
A chromatographic peak facet that quantitates the degree of separation between two peaks of a chromatogram. [Allotrope]
chromatographic peak resolution by USP <621> using widths at baseline
chromatographic peak resolution calculated by the ASTM method
Chromatographic peak resolution that is calculated by the USP <621> method using peak widths measured at the baseline. [Allotrope]
chromatographic peak resolution using baseline peak widths
chromatographic peak resolution by USP using widths at half-height
chromatographic peak resolution calculated by EP
chromatographic peak resolution calculated by JP-27
Chromatographic peak resolution that is calculated using peak widths measured at the half height. [Allotrope]
chromatographic peak resolution using peak width at half-height
Chromatographic peak resolution that is calculated based on peak widths derived from the second statistical moment (peak variance). [Allotrope]
chromatographic peak resolution using statistical moments
The capacity factor is a chromatography peak facet that is a measure of the time the sample component resides in the stationary phase relative to the time it resides in the mobile phase: it expresses how much longer a sample component is retarded by the stationary phase than it would take to travel through the column with the velocity of the mobile phase. [IUPAC]
A chromatography peak facet that denotes the ratio of the peak's capacity factor to that of another specified peak. [Allotrope]
2022-012-07 Changed definition. [Allotrope]
A chromatographic peak asymmetry factor is a chromatography peak facet that is equivalent to the ratio of the time or volume from the center point of a peak to its trailing edge to that of its fronting edge at a specified peak height. [Allotrope]
asymmetry factor measured at 5 percent height
A quantitative asymmetry factor using 5% peak height. [Allotrope]
A quantitative asymmetry factor using the third statistical moment calculated from the peak. [Allotrope]
A chromatography peak facet that measures the amount of band broadening that occurs during the separation and thus the efficiency of the chromatographic system. [Allotrope]
number of theoretical plates (chromatography)
number of theoretical plates by USP method
The number of theoretical plates calculated based on the peak width measured at the baseline. [Allotrope]
number of theoretical plates by tangent method
number of theoretical plates by EP method
number of theoretical plates by JP method
The number of theoretical plates calculated based on the peak width measured at half height. [Allotrope]
number of theoretical plates by peak width at half height
2019-07-01 Changed specification target to be a device configuration. [Allotrope]
A parameter specification specific to the sampler device in the chromatography system. [Allotrope]
An autosampler parameter specification that specifies the volume of sample the autosampler is to inject into the mobile phase for separation. [Allotrope]
autosampler injection volume setting (chromatography)
A parameter specification specific to the pump device in the chromatography system. [Allotrope]
A pump parameter specification that specifies the mobile phase ratio in the eluent. [Allotrope]
pump mobile phase ratio setting (chromatography)
A pump parameter specification that specifies the total flow rate of the combined mobile phases (eluent). [Allotrope]
2020-01-06 Moved to chromatography domain. [Allotrope]
2020-05-11 Fixed definition. [Allotrope]
Washing repetition setting is a setting that sets the number of repetitions of the washing. [Allotrope]
Washing duration setting is a setting that sets the duration of the washing. [Allotrope]
Washing vial position setting is a setting that sets the position of the washing vial. [Allotrope]
Washing solvent type is a setting that sets the type of washing solvent to use. [Allotrope]
An autosampler temperature setting is a setting that sets the temperature within the autosampler. [Allotrope]
Maximum flow rate change setting is a control setting that sets the maximum rate at which the pump is allowed to change the % of solvents being flowed. [Allotrope]
A parameter specification specific to a chromatography system. [Allotrope]
Autosampler injection trigger enable setting is a setting that activates or deactivates triggering of injection based on a specified temperature range. [Allotrope]
Cooler (with range) can be enabled in order to trigger injection once autosampler temperature has reached a certain value. Enabling the setting also involves activation of the cooler.
autosampler injection trigger enable setting
Autosampler injection trigger temperature setting is a setting that specifies the temperature range for triggering injection. [Allotrope]
autosampler injection trigger temperature setting
Mobile phase delivery duration setting is a chromatography system setting that sets the total duration of mobile phase delivery. [Allotrope]
Frit size is a column specification that indicates the nominal size of pores in a frit designed to exclude particles larger than the specified size. [Allotrope]
baseline at start of integration setting
Baseline at start of integration setting is a data processing setting that sets the ordinate value at the start of the integration baseline to the the value of the signal at the time indicated. [Allotrope]
baseline at start of integration setting (chromatography)
Peak end setting is a data processing setting that sets the peak end to the value of the abscissa at the time indicated. [Allotrope]
Baseline boundary setting is a data processing setting that sets the ordinate values at the boundaries of the baseline of integration to the actual signal values at the peak start and peak end. [Allotrope]
baseline boundary setting (chromatography)
integration with peak detection enabled setting
2020-12-04 Fixed flag parent. [Allotrope]
Integration with peak detection enabled setting is a data processing setting that allows the integration process to detect peaks for the time period specified. [Allotrope]
integration with peak detection enabled setting (chromatography)
Negative peak detection enabled is a data processing setting that allows peaks to be detected below the baseline for the time specified. [Allotrope]
negative peak detection enabled setting (chromatography)
area threshold for peak integration setting
Area threshold for peak integration setting is a data processing setting that sets a minimum or maximum area for a peak to be included in the integrated peak list. [Allotrope]
area threshold for peak integration setting (chromatography)
height threshold for peak integration setting
Height threshold for peak integration setting is a data processing setting that sets a minimum or maximum height for a peak to be included in the integrated peak list. [Allotrope]
height threshold for peak integration setting (chromatography)
Expected average peak width setting is a data processing setting that indicates a typical peak width for the time period specified. [Allotrope]
expected average peak width setting (chromatography)
Shoulder detection enabled setting is a data processing setting that allows the integration process to interpolate a baseline for the smaller peak of overlapping peaks for the time period specified. [Allotrope]
shoulder detection enabled setting (chromatography)
Signal-to-noise ratio (USP621) is a signal-to-noise ratio (peak-to-peak) where the noise is calculated over a period that is a minimum of 5 times the peak width. [Allotrope]
Signal-to-noise ratio (EP2.2.46) is a signal-to-noise ratio (peak-to-peak) where the noise is calculated over a period that is a minimum of 20 times the peak width. [Allotrope]
The retention time window lower offset is the extent of the retention time window in time units below the target retention time. [PSI/MS]
The lower and upper offsets may be asymmetric about the target time. [PSI/MS]
The retention time window upper offset is the extent of the retention time window in time units above the target retention time. [PSI/MS]
The retention time window width it the full width of a retention time window for a chromatographic peak. [PSI/MS]
A chromatography data system method is a plan specification that specifies how a process is to be executed on a chromatography data system. [Allotrope]
A column brand name is a brand name of a chromatography column that can be based on the brand name of the substrate and its chemistry modification. [Allotrope]
chromatography column chemistry classification
chromatography column chemistry classification (datum)
chromatography column chemistry type (datum)
A chromatography column chemistry type is a classification datum that classifies a chromatography column by the stationary phase and/or chromatographic packing used. [Allotrope]
A chromatography column length (datum) is a length datum that quantifies the length of a chromatography column. [Allotrope]
A column inner diameter (datum) is an inner diameter quantifies the inner diameter of a column. [Allotrope]
A system flow rate profile is a flow rate profile of the flow rate through the system pump of the chromatograph. [Allotrope]
A sample flow rate profile is a flow rate profile of the flow rate through the sample pump of the chromatograph. [Allotrope]
asymmetry factor measured at 10 percent of height
2022-11-28 Changed pref label and definition. [Allotrope]
A quantitative asymmetry factor calculated at 10 percent of its peak height. [Allotrope]
asymmetry factor measured at 10 % height
A height equivalent to a theoretical plate is a chromatography peak facet quantifying the ratio of the absorption bed length divided by the number of theoretical plates in the absorption bed. [Wikipedia]
height equivalent to a theoretical plate
A density of theoretical plates (chromatography) is a chromatography peak facet that measures the amount of band broadening normalized per length unit that occurs during the separation and thus the efficiency of the chromatographic system. [Allotrope]
density of theoretical plates (chromatography)
Retention volume is a chromatography peak facet that indicates the acquisition volume at the maximum detector response attributed to the peak (analyte band). [Allotrope]
The acquisition volume is the volume elapsed through the chromatography column between the injection of the sample and when the signal is captured. [Allotrope]
A chromatogram data cube is a data cube that represents a chromatogram. [Allotrope]
chromatography column particle size (datum)
A chromatography column particle size is a particle size datum that quantifies the dimensions of packing particles in a chromatography column. [Allotrope]
A chromatography column document is a document that encompasses the information associated with a chromatography column. [Allotrope]
A chromatography column fill type is a classification datum that classifies a chromatography column by the form of the stationary phase in the column. [Allotrope]
chromatography column film thickness (datum)
A chromatography column film thickness is a thickness datum that quantifies the thickness of the film coating in a chromatography column. [Allotrope]
A sample flow rate data cube is a data cube that represents the flow rate through the sample pump of a chromatograph. [Allotrope]
A system flow rate data cube is a data cube that represents the flow rate through the system pump of a chromatograph. [Allotrope]
A gradient segment aggregate document is a document that aggregates gradient segment documents. [Allotrope]
A gradient segment document is a document that encompasses the information associated with a step in some gradient profile. [Allotrope]
A gradient profile setting is a control profile setting that specifies the profile of the ratio of solvents in the mobile phase used over the course of a chromatographic separation. [Allotrope]
gradient profile setting (chromatography)
A hold-up volume is a quality quantification facet that quantifies the hold-up volume of a chromatographic column. [Allotrope]
A peak width at inflection is the peak width calculated by the length between its two inflection points. [Allotrope]
A column void volume time is the time required for an unretained compound to traverse the column and exit. [Allotrope]
A column compartment temperature setting is a temperature setting that specifies the temperature of some column compartment. [Allotrope]
asymmetry factor measured at 4.4 percent height
asymmetry factor measured at 4.4% height
2022-11-28 Changed pref label, added alt label. [Allotrope]
A quantitative asymmetry factor equivalent to the ratio of the time or volume from the center point of a peak to its trailing edge to that of its fronting edge at 4.4 % of the peak height. [Allotrope]
asymmetry factor measured at 4.4 % height
asymmetry factor squared measured at 4.4 percent height
asymmetry factor squared measured at 4.4% height
A quantitative asymmetry factor equivalent to the square of ratio of the time or volume from the center point of a peak to its trailing edge to that of its fronting edge at 4.4 % of the peak height. [Allotrope]
asymmetry factor squared measured at 4.4 % height
asymmetry factor squared measured at 10 percent height
asymmetry factor squared measured at 10% height
A quantitative asymmetry factor equivalent to the square of ratio of the time or volume from the center point of a peak to its trailing edge to that of its fronting edge at 10 % of the peak height. [Allotrope]
asymmetry factor squared measured at 10 % height
A quantitative asymmetry factor equivalent to the square of ratio of the time or volume from the center point of a peak to its trailing edge to that of its fronting edge. [Allotrope]
number of theoretical plates measured at 60.7 percent of peak height
number of theoretical plates measured at 60.7% of peak height
The number of theoretical plates calculated by the peak width at 60.7 % of peak height (2 sigma for a gaussian peak). [Allotrope]
number of theoretical plates measured at 60.7 % of peak height
number of theoretical plates measured at 32.4 percent of peak height
number of theoretical plates measured at 32.4% of peak height
The number of theoretical plates calculated by the peak width at 32.4 % of peak height (3 sigma for a gaussian peak). [Allotrope]
number of theoretical plates measured at 32.4 % of peak height
number of theoretical plates measured at 13.4 percent of peak height
number of theoretical plates measured at 13.4% of peak height
The number of theoretical plates calculated by the peak width at 13.4 % of peak height (4 sigma for a gaussian peak). [Allotrope]
number of theoretical plates measured at 13.4 % of peak height
number of theoretical plates measured at 4.4 percent of peak height
number of theoretical plates measured at 4.4% of peak height
The number of theoretical plates calculated by the peak width at 4.4 % of peak height (5 sigma for a gaussian peak). [Allotrope]
number of theoretical plates measured at 4.4 % of peak height
peak leading edge time at 5 percent of peak height
peak leading edge time at 5% of peak height
The time or volume from the center point of a peak to its leading edge at 5 % of the peak height. [Allotrope]
peak leading edge time at 5 % of peak height
An expected retention time is a peak facet that indicates the expected retention time as specified by the data processing method. [Allotrope]
A chromatography peak type is a classification datum that classifies a chromatography peak by the role played by the substance it is a proxy for in the chromatographic process. [Allotrope]
It is mainly used to determine if it is relevant to the particular analysis.
A chromatography separation type is a classification datum that classifies the underlying separation process used in the chromatographic process. [Allotrope]
reversed phase, ion exchange, normal phase, ligand
An impurity type is a classification datum that classifies a peak by the impurity role played by the substance it is a proxy for in the chromatographic process. [Allotrope]
peak symmetry factor measured at 5% peak height
A chromatography peak facet equivalent to the ratio of the time or volume from the center point of a peak to its fronting edge divided by the entire width of the peak at 5% of the peak height. [Allotrope]
peak symmetry factor measured at 5 % peak height
number of theoretical plates by JP14 method
The number of theoretical plates calculated based on the peak width measured at half height, adjusted to use 5.55 as the square of the standard deviation in accordance with JP14. [Allotrope]
number of theoretical plates by peak width at half height (JP14)
Japanese Pharmacopeia previously required use of a different constant value to the one currently used in alignment with European Pharmacopeia for the square of the standard deviation in this method. This term represents results calculated using that alternate constant value.
A parameter specification specific to the column compartment in the chromatography system. [Allotrope]
column compartment setting (chromatography)
A minimum peak detection slope setting is a data processing setting that defines the minimum slope of the signal (rate of change of the signal per acquisition time) at or above which the start of a peak is detected. [Allotrope]
minimum peak detection slope setting (chromatography)
A void volume is the volume occupied by the mobile phase between the particles in the packed section of a column. [IUPAC]
In gas chromatography, the symbol V_G may be used for the interparticle volume of the column. In the ideal case, neglecting any extra-column volume, V_G is equal to the corrected gas hold-up volume (V0_M). V_G = V0_M = V_M [IUPAC]
In liquid chromatography, the interparticle volume is equal to the mobile-phase hold-up volume (V_M) in the ideal case, neglecting any extra-column volume. [IUPAC]
A suitability calculations enabled setting is a data processing setting that indicates if system suitability results are to be calculated. [Allotrope]
suitability calculations enabled setting
An unknown suitability calculations enabled setting is a data processing setting that indicates if system suitability results are to be calculated for unknowns. [Allotrope]
unknown suitability calculations enabled setting
A suitability pharmacopoeia setting is a data processing setting that indicates which pharmacopoeia calculation methods are to be used. [Allotrope]
A half height multiplier plate count setting (USP) is a data processing setting that indicates at which peak height the USP plate count should be calculated. [Allotrope]
half height multiplier plate count setting (USP)
A half height multiplier resolution setting (USP) is a data processing setting that indicates at which peak height the USP resolution should be calculated. [Allotrope]
half height multiplier resolution setting (USP)
A blank injection noise calculation setting is a data processing setting that indicates that a blank injection is to be used for calculating baseline noise. [Allotrope]
blank injection noise calculation setting
A half height multiplier signal to noise setting (USP) is a data processing setting that indicates the half height multiplier that is to be used in determining the baseline region for calculating noise in USP S/N calculations. [Allotrope]
half height multiplier signal to noise setting (USP)
A half height multiplier signal to noise setting (EP) is a data processing setting that indicates the half height multiplier that is to be used in determining the baseline region for calculating noise in EP S/N calculations. [Allotrope]
half height multiplier signal to noise setting (EP)
A half height multiplier signal to noise setting (JP) is a data processing setting that indicates the half height multiplier that is to be used in determining the baseline region for calculating noise in JP S/N calculations. [Allotrope]
half height multiplier signal to noise setting (JP)
A mass chromatogram data cube is a data cube that is a representation of some mass chromatogram. [Allotrope]
A chromatographic peak resolution that is calculated using peak widths from the Foley Dorsey equation for asymmetric peaks. [Allotrope]
chromatographic peak resolution using Foley-Dorsey method
chromatographic peak resolution using peak widths at 4.4% height
A chromatographic peak resolution that is calculated using peak widths at 4.4 % peak height. [Allotrope]
chromatographic peak resolution using peak widths at 4.4 % height
A chromatography column separation mode is a classification datum that classifies a column by the type of chromatography it supports. [Allotrope]
A stationary phase document is a document that encapsulates the information associated with a stationary phase. [Allotrope]
A substrate document is a document that encapsulates the information associated with a substrate. [Allotrope]
A substrate permeability type is a classification datum that classifies the permeability of a substrate. [Allotrope]
A substrate material description is a description of the material used in a substrate. [Allotrope]
A phase chemistry type is a classification datum that classifies the chemistry of some stationary phase. [Allotrope]
An acidity is a quality quantification facet that quantifies the acidity of a chromatographic stationary phase. [Allotrope]
A basicity is a quality quantification facet that quantifies the basicity of a chromatographic stationary phase. [Allotrope]
A hydrophobicity is a quality quantification facet that quantifies the hydrophobicity of a chromatographic stationary phase. [Allotrope]
hydrophobicity (hydrophobic subtraction)
A steric resistance is the quality quantification facet that quantifies the steric resistance of a chromatographic stationary phase. [Allotrope]
steric resistance (hydrophobic subtraction)
A polarizability is the quality quantification facet that quantifies the polarizability of a chromatographic stationary phase. [Allotrope]
polarizability (hydrophobic subtraction)
Mobile phase is the chromatographic phase role of a fluid material entity in a chromatography process to act as the fluid that percolates through or along the stationary bed in chromatography. [Allotrope, CHMO]
A stationary phase is the chromatographic phase role of a solid, gel or liquid material that is the stationary component in chromatography. [Allotrope]
One of the portions of material between which the components to be separated are distributed in chromatography. [CHMO]
Gaseous mobile phase is the mobile phase role of a gaseous material. [Allotrope]
Supercritical mobile phase is the mobile phase role of a supercritical fluid material. [Allotrope]
Effluent is a mobile phase eluting from a column. [Allotrope]
2020-12-16 Rephrased definition [Allotrope]
A mobile phase that is analyte material coming from the chromatograph. [Allotrope]
Eluent is a mobile phase entering a column to perform a separation of material. [Allotrope]
A capillary inner coating role is a coating role of a material that is a coating within a chromatography column. [Allotrope]
An endcapping role is a supporting material role with the purpose of preventing chromatographic analytes from interacting with the substrate of the stationary phase. [Allotrope]
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