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ISO 3329:1975

Withdrawn

Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

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

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Withdrawn date

13-04-2019

Language(s)

English, French

Published date

01-07-1975

€60.00
Excluding VAT

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.

DocumentType
Standard
Pages
4
PublisherName
International Organization for Standardization
Status
Withdrawn

Standards Relationship
NBN T 03 054 : 1979 Identical
BS 4267-9:1987 Similar to

BS 4267-0:1987 Ammonium nitrate General introduction

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