ISO 3329:1975

$12.35

Ammonium nitrate for industrial use — Determination of content of sulphur compounds — Method by reduction and titrimetry

Published By	Publication Date	Number of Pages
ISO	1975-07	6

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Categories: 71.060.50 - Salts, ISO

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Description

Applicable to products the content of which, expressed as sulphate, is equal to or more than 0.0005 % (m/m). Heating of a test portion in the presence of sodium carbonate, in a fume-cupboard, until the ammonium salts have been eliminated (about 300 °C). Reduction of the sulphureous residue to sulphides by a mixture of hydriodic acid and hypophosphorus acid. Absorption of the hydrogen sulphide evolved in a mixture of sodium hydroxide solution and acetone. Titration of the sulphide with standard volumetric mercury(II) acetate solution in the presence of dithizone as indicator. A typical apparatus for reduction and distillation is shown in a figure.

Additional information

Published Code	ISO
Published By	International Organization for Standardization
Publication Date	1975-07
Pages Count	6
Language	English
Edition	1
File Size	317.4 KB
ICS Codes	71.060.50 - Salts

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ISO 3329:1975

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