| 释义 |
iodimetry Chem.|aɪəˈdɪmɪtrɪ|
[f. iodine n. + -metry.]
The titrimetric analysis of an oxidizing or reducing agent using the iodine/iodide redox system; spec. the quantitative analysis of a solution of a reducing agent by titration with a standard solution of iodine. Cf. iodometry.
1897Jrnl. Chem. Soc. LXXII. ii. 342 (heading) Barium thiosulphate as basis for iodimetry. 1907Lincoln & Walton Exerc. Elem. Quantitative Chem. Analysis 78 The methods of determination in iodimetry may be divided into three general classes: 1. The titration of..reducing agents. 2...oxidizing agents... 3. Free chlorine. 1939A. I. Vogel Text-bk. Quantitative Inorg. Analysis iii. 401 Iodimetry covers titrations with a standard solution of iodine. Iodometry deals with the titration of iodine liberated in chemical reactions. 1960R. J. Winterton in C. L. & D. W. Wilson Comprehensive Analytical Chem. Ib. vii. 249 Iodine..may be used as a standard solution and titrated into the reducing solution, or it may be liberated from potassium iodide or some other compound of iodine by an oxidising agent in solution, and titrated with thiosulphate solution... The use of standard iodine is called direct iodimetry, and the other method indirect iodimetry.
So iodiˈmetric, a., of or pertaining to iodimetry; iodiˈmetrically adv., by means of iodimetry.
1887Jrnl. Chem. Soc. LII. 997 The iodimetric method serves well for the assay of commercial sodium sulphide. Ibid. 998 Ferrous and ferric oxides, in hydrochloric acid solution, can be determined iodimetrically. 1931Jenkins & Dumez Quantitative Pharmaceutical Chem. viii. 123 Iodimetric methods include some of the most exact processes of volumetric analysis, because..the presence of one part of iodine in several million parts of solution can be recognised by means of starch indicator solution. 1963Skoog & West Fund. Analytical Chem. xx. 458 The first [category] is made up of procedures that use a standard solution of iodine to titrate easily oxidized substances. These are termed direct or iodimetric methods and have rather limited applicability since iodine is a relatively weak oxidizing agent. 1969H. T. Evans tr. Hägg's Gen. & Inorg. Chem. xxi. 534 Since many oxidizing agents oxidize iodide ion to iodine, such substances can also be determined iodimetrically. |