{"term":{"id":"08765","title":"total reflection X-ray fluorescence analysis","longtitle":"IUPAC Gold Book - total reflection X-ray fluorescence analysis","doi":"10.1351\/goldbook.08765","code":"08765","status":"current","initialism":"<em>initialism<\/em>: TXRF","definitions":[{"id":1,"text":"Measurement method of X-ray fluorescence analysis in which a collimated X-ray flux impinges on a smooth surface under a grazing angle; rendering total reflection is used to excite atoms in the top layers of the material for measurement of the amounts of elements.","notes":{"1":"The method is highly sensitive because interfering X-rays of higher energies are refracted or adsorbed. Mass fractions of \\(\\pu{E-12}\\:(\\pu{ng kg-1})\\) may be measured."},"sources":["PAC, 2021, 93, 69. 'Vocabulary of radioanalytical methods (IUPAC Recommendations 2020)' on page 104 (https:\/\/doi.org\/10.1515\/pac-2019-0302)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/08765\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/08765\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/08765\/plain"},"citation":"Citation: 'total reflection X-ray fluorescence analysis' 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.08765","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":"2026-05-18T03:36:51+00:00"}}