iodometryn.
/ʌɪəˈdɒmɪtri/ Chemistry.
The titrimetric analysis of an oxidizing or reducing agent using the iodine/iodide redox system; spec. the quantitative analysis of a solution of an oxidizing agent by the addition of excess iodide followed by titration of the iodine so liberated with thiosulphate or arsenite solution. Cf. iodimetry n.
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iodometry1883
1883 Chem. News 6 Apr. 166/1 (heading) Preparation of a durable starch solution for iodometry.
1916 Chem. Abstr. 10 730 (heading) Differential iodometry. I. Determination of periodates, iodates, bromates and chlorates in the presence of each other.
1928 Chem. Abstr. 22 2901 Reaction between iodic and hydriodic acids in very dilute solution and the titration of the liberated iodine with thiosulfate... An investigation of reactions involved in iodometry.
1939 A. I. Vogel Text-bk. Quantitative Inorg. Anal. iii. 401 Iodimetry covers titrations with a standard solution of iodine. Iodometry deals with the titration of iodine liberated in chemical reactions.
1973 Chem. Abstr. 78 23524 Iodometry can be employed for detn. of small amts. of Zn, Cu, Cd, Co and Hg.
Derivatives
iodoˈmetric adj. of or pertaining to iodometry.
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the world > matter > chemistry > chemical assay or analytical chemistry > [adjective] > of specific types > of or relating to titration > of or relating to iodometry
iodometric1856
1856 Q. Jrnl. Chem. Soc. 8 194 We have employed the much more accurate and convenient iodometric method, which..gives a degree of accuracy attainable by very few analytical processes.
1891 Jrnl. Chem. Soc. 60 614 The facility with which pure potassium iodate is prepared renders it an admirable basis for iodometric analysis.
1960 Limnology & Oceanogr. V. 343 (heading) A note on a stabilized starch indicator for use in iodometric and iodimetric determinations.
iodoˈmetrically adv. by means of iodometry.
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the world > matter > chemistry > chemical assay or analytical chemistry > [adverb] > by process of specific types of chemical analysis > by means of titration > specifically by means of iodometry
iodometrically1928
1928 A. W. Wellings Volumetric Anal. v. 102 Nitrites may also be estimated iodometrically.
1957 G. E. Hutchinson Treat. Limnol. I. xiii. 769 The excess chromate, equivalent to the original sulfate, is determined iodometrically.
1971 G. D. Christian Analyt. Chem. xv. 238 Sodium thiosulfate solution is standardized iodometrically against a pure oxidizing agent such as K2Cr2O7, KIO3, KBrO3, or metallic copper.
This entry has not yet been fully updated (first published 1976; most recently modified version published online December 2018).
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