ISO 995:1975

$12.35

Potassium hydroxide for industrial use — Determination of silica content — Reduced molybdosilicate photometric method

Published By	Publication Date	Number of Pages
ISO	1975-09	5

Guaranteed Safe Checkout

Categories: 71.060.40 - Bases, ISO

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

Description

The method is applicable to products having silica contents exceeding 10 mg/kg. The principle is based on the formation of yellow oxidized silico-molybdic complex in a strongly acid medium, in the presence of boric acid to suppress interference by fluorides. Selective reduction of this complex with a mixture of aminonaphtholsulphonic acid (4-amino-3-hydroxynaphthalene-1-sulphonic acid), sodium metabisulphite and sodium sulphite, in the presence of oxalic acid and in a strongly acid medium so as to suppress interference by phosphates. Photometric measurement of the blue-coloured complex at a wavelength of about 795 nm.

Additional information

Published Code	ISO
Published By	International Organization for Standardization
Publication Date	1975-09
Pages Count	5
Language	English
Edition	1
File Size	286.7 KB
ICS Codes	71.060.40 - Bases

Preview PDF


PDF Format	Searchable	Printable	Preview Now

ISO 995:1975

Related products