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eLibrary > BS ISO 21257:2024 - TC Tracked Changes. Plastics. Polymer polyols for use in the production of polyurethanes. Determination of the residual acrylonitrile and styrene monomer content by gas chromatography >

BS ISO 21257:2024 - TC Tracked Changes. Plastics. Polymer polyols for use in the production of polyurethanes. Determination of the residual acrylonitrile and styrene monomer content by gas chromatography, 2024

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BS ISO 21257:2024 - TC Tracked Changes. Plastics. Polymer polyols for use in the production of polyurethanes. Determination of the residual acrylonitrile and styrene monomer content by gas chromatography, 2024

30503275
A-30497220 [Go to Page]
undefined
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents and materials
6 Apparatus
7 Preparation of calibration solution and sample solution [Go to Page]
7.1 General
7.2 Method A for using OT column [Go to Page]
7.2.1 Preparation of internal standard solution
7.2.2 Preparation of calibration solutions
7.2.3 Preparation of sample solution
7.3 Method B for using packed column [Go to Page]
7.3.1 Preparation of internal standard solution
7.3.2 Preparation of calibration solutions
7.3.3 Preparation of sample solution
8 Procedure [Go to Page]
8.1 Gas chromatographic procedure
8.2 Measurement of sample solutions and calibration solutions
8.3 Evaluation of gas chromatographic peak
9 Expression of the results [Go to Page]
9.1 Preparation of the calibration curve
9.2 Calculation of results from a calibration graph
9.3 Calculation of results from a single-point calibration
9.4 Acceptability of results and measurement sensitivity
10 Precision
11 Test report
Annex A (informative) Typical analytical conditions
Annex B (informative) Typical examples of GC chromatogram
Annex C (informative) Precision
Bibliography [Go to Page]

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BS ISO 21257:2024 - TC Tracked Changes. Plastics. Polymer polyols for use in the production of polyurethanes. Determination of the residual acrylonitrile and styrene monomer content by gas chromatography, 2024

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