ISO 16014-3:2019
Plastics — Determination of average molecular weight and molecular weight distribution of polymers using size-exclusion chromatography — Part 3: Low-temperature method
This document specifies a method for determining the average molecular weight and the molecular weight distribution of polymers by size-exclusion chromatography (SEC) using an organic eluent at a temperature lower than 60 °C (see Annex A). The average molecular weight and the molecular weight distribution are calculated from a calibration curve prepared using polymer standards. Therefore, this test method is classified as a relative method (see ISO 16014-1).
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Procedure
7.1 Preparation of solutions of molecular weight standards
7.2 Preparation of sample solutions
7.3 Preparation of solutions for column performance evaluation
7.4 Setting up the apparatus
7.5 Operating parameters
7.5.1 Flow rate
7.5.2 Injection masses and injection volumes
7.5.3 Column temperature
7.5.4 Detector sensitivity
7.6 Number of determinations
8 Data acquisition and processing
9 Expression of results
10 Precision
10.1 General
10.2 Experimental conditions
10.3 Results of interlaboratory tests
11 Test report
Annex A (informative) Further information on applicability of method
Annex B (informative) Further information on reagents
Annex C (informative) Further information on interlaboratory tests
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Procedure
7.1 Preparation of solutions of molecular weight standards
7.2 Preparation of sample solutions
7.3 Preparation of solutions for column performance evaluation
7.4 Setting up the apparatus
7.5 Operating parameters
7.5.1 Flow rate
7.5.2 Injection masses and injection volumes
7.5.3 Column temperature
7.5.4 Detector sensitivity
7.6 Number of determinations
8 Data acquisition and processing
9 Expression of results
10 Precision
10.1 General
10.2 Experimental conditions
10.3 Results of interlaboratory tests
11 Test report
Annex A (informative) Further information on applicability of method
Annex B (informative) Further information on reagents
Annex C (informative) Further information on interlaboratory tests
Bibliography