| 释义 |
iodometry Chem.|aɪəˈdɒmɪtrɪ|
[f. iodo- + -metry.]
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.
1883Chem. News 6 Apr. 166/1 (heading) Preparation of a durable starch solution for iodometry. 1916Chem. Abstr. X. 730 (heading) Differential iodometry. I. Determination of periodates, iodates, bromates and chlorates in the presence of each other. 1928Ibid. XXII. 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[see iodimetry]. 1973Chem. Abstr. LXXVIII. 23524 Iodometry can be employed for detn. of small amts. of Zn, Cu, Cd, Co and Hg.
So iodoˈmetric a., of or pertaining to iodometry; iodoˈmetrically adv., by means of iodometry.
1856Q. Jrnl. Chem. Soc. VIII. 194 We have employed the much more accurate and convenient iodometric method, which..gives a degree of accuracy attainable by very few analytical processes. 1891Jrnl. Chem. Soc. LX. 614 The facility with which pure potassium iodate is prepared renders it an admirable basis for iodometric analysis. 1928A. W. Wellings Volumetric Analysis v. 102 Nitrites may also be estimated iodometrically. 1957G. E. Hutchinson Treat. Limnol. I. xiii. 769 The excess chromate, equivalent to the original sulfate, is determined iodometrically. 1960Limnology & Oceanogr. V. 343 (heading) A note on a stabilized starch indicator for use in iodometric and iodimetric determinations. 1971G. D. Christian Analytical Chem. xv. 238 Sodium thiosulfate solution is standardized iodometrically against a pure oxidizing agent such as K2Cr2O7, KIO3, KBrO3, or metallic copper. |