{"term":{"id":"01771","title":"direct-injection enthalpimetry","longtitle":"IUPAC Gold Book - direct-injection enthalpimetry","doi":"10.1351\/goldbook.D01771","code":"D01771","status":"current","synonym":"<em>synonyms<\/em>: batch injection calorimetry, concentration thermometric technique, direct thermometric method","definitions":[{"id":1,"text":"An analytical method in which a reactant is injected into a calorimetric vessel containing another reagent. The enthalpy change of the ensuing reaction is measured and directly related to the amount of the limiting reagent (usually the analyte). If the experiment determines information other than amounts of analytes, an acceptable synonym is 'batch injection calorimetry'. Other terms which have been used in the literature but are not recommended include the 'concentration thermometric technique' and the 'direct thermometric method'.","links":[{"term":"enthalpy","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/E02141"},{"term":"reagent","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/R05190"}],"sources":["PAC, 1994, 66, 2487. 'Nomenclature of thermometric and enthalpimetric methods in chemical analysis (IUPAC Recommendations 1994)' on page 2490 (https:\/\/doi.org\/10.1351\/pac199466122487)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/D01771\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/D01771\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/D01771\/plain"},"citation":"Citation: 'direct-injection enthalpimetry' 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.D01771","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":"2026-06-07T10:54:55+00:00"}}