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BSI 23/30459281 DC:2023 Edition

BSI 23/30459281 DC:2023 Edition

$13.70

BS ISO 7431-1. Thiourea for industrial use – Part 1. Test methods

Published By Publication Date Number of Pages
BSI 2023 19
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PDF Catalog

PDF Pages PDF Title
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Test methods
4.1 General
4.2 Determination of thiourea content
4.2.1 Principle
4.2.2 Reagents
4.2.3 Apparatus
11 4.2.4 Procedure
4.2.5 Calculation
4.2.6 Expression of results
4.3 Determination of water insoluble substance
4.3.1 Principle
4.3.2 Apparatus
12 4.3.3 Procedure
4.3.4 Calculation
4.3.5 Expression of results
4.4 Determination of ignition residue
4.4.1 Principle
4.4.2 Apparatus
4.4.3 Procedure
13 4.4.4 Calculation
4.4.5 Expression of results
4.5 Determination of initial melting point
4.5.1 Principle
4.5.2 Apparatus
4.5.3 Procedure
4.5.4 Calculation
4.5.5 Expression of results
4.6 Determination of turbidity
4.7 Determination of thiocyanate content
4.7.1 Principle
14 4.7.2 Reagents
4.7.3 Apparatus
4.7.4 Procedure
4.7.5 Calculation
4.7.6 Expression of results
4.8 Determination of calcium element
4.8.1 General
4.8.2 Ion chromatography
15 4.8.3 Inductively coupled plasma optical emission spectrometry (ICP-OES)
16 4.8.4 Atomic absorption spectrometry (AAS) (referee method)
17 4.9 Determination of heavy metals
4.9.1 Principle
4.9.2 Reagents
4.9.3 Apparatus
4.9.4 Procedure
18 4.9.5 Calculation
4.9.6 Expression of results
19 Bibliography

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BSI 23/30459281 DC
$13.70