BS EN ISO 11337:2023 – TC

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Tracked Changes. Plastics. Polyamides. Determination of ε-caprolactam and ω-laurolactam by gas chromatography

Published By	Publication Date	Number of Pages
BSI	2023	46

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Categories: 83.080.20 - Thermoplastic materials, BSI

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This document specifies a method for determining ??caprolactam and ??laurolactam in polyamides by gas chromatography. It is applicable particularly to the determination of ??caprolactam in polyamide 6 and ??laurolactam in polyamide 12. Two variants of the basic method are specified. — Method A is an extraction method with boiling methanol, and the extract is injected into a gas chromatograph. — Method B is a method using a solvent, and the solution is injected into a gas chromatograph.

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PDF Pages	PDF Title
30	undefined
32	European foreword Endorsement notice
34	Foreword
35	1 Scope 2 Normative references 3 Terms and definitions 4 Method A: Extraction method 4.1 Principle 4.2 Reagents
36	4.3 Apparatus and materials
37	4.4 Preparation of test sample
38	4.5 Procedure 4.5.1 Test portion 4.5.2 Extraction 4.5.3 Preparation of internal-standard solution 4.5.4 Preparation of sample solution 4.5.5 Preparation of calibration solution 4.5.6 Gas-chromatographic analysis of sample and calibration solutions
39	4.5.7 Evaluation of gas chromatographic peaks 4.6 Expression of results 4.7 Precision
40	4.8 Test report 5 Method B: Dissolution method 5.1 Principle 5.2 Reagents
41	5.3 Apparatus
42	5.4 Preparation of internal-standard solutions 5.4.1 General 5.4.2 Internal standard for unextracted polyamide 6 5.4.3 Internal standard for extracted polyamide 6 5.4.4 Internal standard for polyamide 12
43	5.4.5 Preparation of calibration solutions
44	5.4.6 Calibration 5.5 Procedure 5.5.1 Preparation and injection of sample solution 5.5.2 Evaluation of gas-chromatographic peaks 5.5.3 Solvent recovery
45	5.6 Expression of results 5.7 Precision 5.8 Test report