{"term":{"id":"01229","title":"concentration in experimental surface","longtitle":"IUPAC Gold Book - concentration in experimental surface","doi":"10.1351\/goldbook.C01229","code":"C01229","status":"current","synonym":"<em>synonym<\/em>: surface concentration","definitions":[{"id":1,"text":"The amount of the material of interest divided by the total amount of substances in the volume of interest. Concentration may be defined in terms of numbers of atoms (particles) (\\(\\rm{ppma}\\)) or in terms of weight (\\(\\frac{\\unicode[Times]{x3BC}\\rm{g}}{\\rm{g}}\\)).","links":[{"term":"weight","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/W06668"}],"sources":["PAC, 1979, 51, 2243. 'General aspects of trace analytical methods—IV. Recommendations for nomenclature, standard procedures and reporting of experimental data for surface analysis techniques' on page 2246 (https:\/\/doi.org\/10.1351\/pac197951112243)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/C01229\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/C01229\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/C01229\/plain"},"citation":"Citation: 'concentration in experimental surface' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351\/goldbook.C01229","license":"The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/) for individual terms.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2026-05-17T21:38:08+00:00"}}