@prefix : . @prefix dct: . @prefix owl: . @prefix rdf: . @prefix xml: . @prefix xsd: . @prefix af-c: . @prefix af-e: . @prefix af-m: . @prefix af-p: . @prefix af-q: . @prefix af-r: . @prefix af-x: . @prefix rdfs: . @prefix skos: . @prefix af-cur: . @base . rdf:type owl:Ontology ; owl:versionIRI ; owl:imports , , , ; dct:issued "2025-12-16T12:00:00Z"^^xsd:dateTime ; dct:license ; dct:modified "2025-06-25T12:00:00Z"^^xsd:dateTime ; dct:rights , ; dct:title "AFO pH Domain Ontology (WD/2025/12)" ; owl:priorVersion ; owl:versionInfo "WD/2025/12" . ################################################################# # Annotation properties ################################################################# ### http://purl.allotrope.org/ontologies/property#AFX_0002796 af-x:AFX_0002796 rdf:type owl:AnnotationProperty . ### http://purl.allotrope.org/ontologies/property#AFX_0002798 af-x:AFX_0002798 rdf:type owl:AnnotationProperty . ### http://purl.allotrope.org/ontologies/property#AFX_0002809 af-x:AFX_0002809 rdf:type owl:AnnotationProperty . ### http://purl.org/dc/terms/source dct:source rdf:type owl:AnnotationProperty . ### http://www.w3.org/2004/02/skos/core#altLabel skos:altLabel rdf:type owl:AnnotationProperty . ### http://www.w3.org/2004/02/skos/core#changeNote skos:changeNote rdf:type owl:AnnotationProperty . ### http://www.w3.org/2004/02/skos/core#definition skos:definition rdf:type owl:AnnotationProperty . ### http://www.w3.org/2004/02/skos/core#example skos:example rdf:type owl:AnnotationProperty . ### http://www.w3.org/2004/02/skos/core#note skos:note rdf:type owl:AnnotationProperty . ### http://www.w3.org/2004/02/skos/core#prefLabel skos:prefLabel rdf:type owl:AnnotationProperty . ### http://www.w3.org/2004/02/skos/core#scopeNote skos:scopeNote rdf:type owl:AnnotationProperty . ################################################################# # Object Properties ################################################################# ### http://purl.allotrope.org/ontologies/property#AFX_0000051 af-x:AFX_0000051 rdf:type owl:ObjectProperty ; dct:license ; dct:rights ; dct:source "Green Book, 3rd ed.: IUPAC Quantities, Units and Symbols in Physical Chemistry. Third Edition, RSC Publishing, Cambridge 2007." , "PAC, 1996, 68, 957 (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996))" , "PAC, 1997, 69, 1007 (Reference value standards and primary standards for pH measurements in D2O and aqueousorganic solvent mixtures: New accessions and assessments (Technical Report))" ; rdfs:seeAlso "PAC, 1984, 56, 567 (Physicochemical quantities and units in clinical chemistry with special emphasis on activities and activity coefficients (Recommendations 1983)" , "PAC, 1990, 62, 2167 (Glossary of atmospheric chemistry terms (Recommendations 1990))" , "PAC, 2002, 74, 2169 (Measurement of pH. Definition, standards, and procedures (IUPAC Recommendations 2002))" ; skos:changeNote "2024-09-12 Changed [IUPAC Gold Book] attribution to [IUPAC] and added license and rights fields." ; skos:definition "The quantity pH is defined in terms of the activity of hydrogen(1+) ions (hydrogen ions) in solution: pH = − lg[a(H+)] = − lg [m(H+) γ_m(H+) / m0], where a(H+) is the activity of hydrogen ion (hydrogen 1+) in aqueous solution, H+(aq), γ_m(H+) is the activity coefficient of H+(aq) (molality basis) at molality m(H+), and m0 = 1 mol kg −1 is the standard molality. [IUPAC]" ; skos:prefLabel "pH" . ### http://purl.allotrope.org/ontologies/property#AFX_0000052 af-x:AFX_0000052 rdf:type owl:ObjectProperty ; rdfs:subPropertyOf af-x:AFX_0000051 ; skos:altLabel "pH" ; skos:definition "The pH value of a calibration point. [Allotrope]" ; skos:prefLabel "pH of calibration point" . ### http://purl.allotrope.org/ontologies/property#AFX_0000053 af-x:AFX_0000053 rdf:type owl:ObjectProperty ; rdfs:subPropertyOf af-x:AFX_0000051 ; skos:definition "The pH value at a given temperature. [Allotrope]" ; skos:example "Nova Flex pH at temp" ; skos:prefLabel "pH at temperature" . ### http://purl.allotrope.org/ontologies/property#AFX_0000067 af-x:AFX_0000067 rdf:type owl:ObjectProperty ; rdfs:subPropertyOf af-x:AFX_0000051 ; skos:definition "The temperature compensated pH is the calculated pH accounting for error due to a sample's temperature. [Allotrope]" ; skos:prefLabel "temperature compensated pH" . ################################################################# # Classes ################################################################# ### http://purl.allotrope.org/ontologies/equipment#AFE_0000237 af-e:AFE_0000237 rdf:type owl:Class ; rdfs:subClassOf af-e:AFE_0000351 ; skos:altLabel "pH glass electrode" ; skos:changeNote "2016-02-02 Add harmonized property restrictions [OSTHUS]" , "2024-09-12 Remove [GENE] attribution as this is purely [CHMO]." ; skos:definition "A hydrogen-ion-responsive electrode consisting of a piece, usually a bulb, of special glass attached to a stem of high-resistance glass complete with internal reference electrode and internal filling solution system. [CHMO]" ; skos:prefLabel "glass electrode" . ### http://purl.allotrope.org/ontologies/equipment#AFE_0000351 af-e:AFE_0000351 rdf:type owl:Class ; rdfs:subClassOf af-e:AFE_0000422 ; skos:altLabel "pH analyser"@en-gb , "pH analyzer" , "pH sensor" ; skos:changeNote "2017-10-25 Changed pref label to reflect taxonomy better [OSTHUS]" ; skos:definition "The pH sensor is able to detect the amount of free hydrogen ions in a sample. [Allotrope]" ; skos:prefLabel "pH electrode" . ### http://purl.allotrope.org/ontologies/equipment#AFE_0000414 af-e:AFE_0000414 rdf:type owl:Class ; rdfs:subClassOf af-e:AFE_0000115 ; skos:definition "An electrochemical cell which is used for practical pH measurements, consisting of a hydrogen ion-responsive electrode and a reference electrode immersed in the test solution. [CHMO]" ; skos:prefLabel "operational pH cell" . ### http://purl.allotrope.org/ontologies/equipment#AFE_0000869 af-e:AFE_0000869 rdf:type owl:Class ; rdfs:subClassOf af-e:AFE_0000351 ; skos:changeNote "2016-02-02 add harmonized property restrictions [OSTHUS]" ; skos:definition "The quinhydrone electrode is a type of redox electrode which can be used to measure the hydrogen ion concentration (pH) of a solution in a chemical experiment. It provides an alternative to the commonly used glass electrode in a pH meter. [Wikipedia]" ; skos:prefLabel "quinhydrone electrode" . ### http://purl.allotrope.org/ontologies/material#AFM_0000084 af-m:AFM_0000084 rdf:type owl:Class ; rdfs:subClassOf af-m:AFM_0000015 , af-m:AFM_0000133 ; af-x:AFX_0002796 af-r:AFR_0001223 ; skos:altLabel "pH calibration solution" ; skos:definition "A pH calibration buffer provides a calibration point for pH calibrations. [Allotrope]" ; skos:example "The 7.382 and 6.838 buffers are buffered to those specific pH's at 37°C and are NIST traceable." ; skos:prefLabel "pH calibration buffer" . ### http://purl.allotrope.org/ontologies/material#AFM_0000278 af-m:AFM_0000278 rdf:type owl:Class ; rdfs:subClassOf af-m:AFM_0000133 ; af-x:AFX_0002796 af-r:AFR_0001223 ; dct:license ; dct:rights ; dct:source "PAC, 1985, 57, 531. (Definition of pH scales, standard reference values, measurement of pH and related terminology (Recommendations 1984)) on page 541" ; skos:changeNote "2024-09-12 Changed [IUPAC Recommendations 2002] attribution to [IUPAC] and added license, rights, and source fields." ; skos:definition "Values that may be assigned to secondary standard pH solutions at each temperature with reference to pH values of a primary standard of the same nominal composition. [IUPAC]" ; skos:prefLabel "secondary pH standard" . ### http://purl.allotrope.org/ontologies/process#AFP_0000195 af-p:AFP_0000195 rdf:type owl:Class ; rdfs:subClassOf af-p:AFP_0002389 ; skos:changeNote "2016-02-02 Add harmonized property restrictions [OSTHUS]" ; skos:definition "Calibration of a pH meter using special data point positions. [Allotrope]" ; skos:prefLabel "pH meter calibration" . ### http://purl.allotrope.org/ontologies/result#AFR_0000025 af-r:AFR_0000025 rdf:type owl:Class ; rdfs:subClassOf af-r:AFR_0000207 ; skos:changeNote "2016-02-02 Add harmonized property restrictions [OSTHUS]" ; skos:definition "A pH measurement result is the outcome of a the process of pH measurement. [Allotrope]" ; skos:prefLabel "pH measurement result" . ### http://purl.allotrope.org/ontologies/result#AFR_0000101 af-r:AFR_0000101 rdf:type owl:Class ; rdfs:subClassOf af-r:AFR_0000490 ; skos:changeNote "2016-02-02 Add harmonized property restrictions [OSTHUS]" ; skos:definition "The pH titration curve contains the volume of the titrant as the independent variable and the pH of the solution as the dependent variable (because it changes depending on the composition of the two solutions). [Wikipedia]" ; skos:prefLabel "pH titration curve" . ### http://purl.allotrope.org/ontologies/result#AFR_0002289 af-r:AFR_0002289 rdf:type owl:Class ; rdfs:subClassOf af-r:AFR_0001217 ; dct:replaces af-p:AFP_0002302 ; skos:changeNote "2020-12-17 Replaces deprecated term af-p:AFP_0002302 [Allotrope]" ; skos:definition "A calibration point in a pH meter calibration. [Allotrope]" ; skos:prefLabel "pH meter calibration point" . ################################################################# # Individuals ################################################################# ### http://purl.allotrope.org/voc/attribution rdf:type owl:NamedIndividual , dct:RightsStatement ; dct:description """ These taxonomies contain material or may constitute derivative works of material which may be subject to copyright by one of the following organizations. By using these taxonomies, you agree to the following terms and conditions applicable to its contents: ****************************************************************************** Copyright Notice and Terms for IUPAC Gold Book ______________________________________________________________________________ Copyright © 1998, Regents of the University of California All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 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Publisher: HUPO Proteomics Standards Initiative Mass Spectrometry Standards Working Group and HUPO Proteomics Standards Initiative Proteomics Informatics Working Group. This work is used pursuant to a Creative Commons license available here: http://creativecommons.org/licenses/by/3.0/legalcode ****************************************************************************** Attribution Notice for National Center for Biomedical Ontology materials. 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Copyright © 2015-2025 Allotrope Foundation """ ; dct:title "Creative Commons Attribution 4.0 International Public License" . ### Generated by the OWL API (version 5.1.19) https://github.com/owlcs/owlapi/