Advantages of masking sulfite ions with dilute formaldehyde solutions in the iodometric analysis of sulfur-containing mixtures

Conditions for masking sulfite ions with formaldehyde in the iodometric analysis of sulfur-containing mixtures are discussed. The use of dilute formaldehyde solution for these purposes offers some advantages in comparison to the regularly used commercial 37% reagent. The solutions of the recommended...

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Bibliographic Details
Published in:Journal of analytical chemistry (New York, N.Y.) N.Y.), 2010-03, Vol.65 (3), p.305-307
Main Authors: Kiryushov, V. N., Skvortsova, L. I.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Chemistry
Chemistry and Materials Science
Formaldehyde
Sulfites
Sulfur
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Summary:Conditions for masking sulfite ions with formaldehyde in the iodometric analysis of sulfur-containing mixtures are discussed. The use of dilute formaldehyde solution for these purposes offers some advantages in comparison to the regularly used commercial 37% reagent. The solutions of the recommended concentrations (1–2% of formaldehyde) appeared to be stable for 6 years at least, which simplified the analysis and reduced the consumption of the reagent.
ISSN:1061-9348
1608-3199
DOI:10.1134/S1061934810030160