BS ISO 16014-1:2019 – TC:2020 Edition
$186.33
Tracked Changes. Plastics. Determination of average molecular weight and molecular weight distribution of polymers using size-exclusion chromatography – General principles
Published By | Publication Date | Number of Pages |
BSI | 2020 | 54 |
This document specifies a general method for determining the average molecular weight and the molecular weight distribution of polymers using size-exclusion chromatography (SEC).
The average molecular weight and the molecular weight distribution are calculated from a calibration curve constructed using polymer standards if using one of the SEC techniques described in ISO 16014-2 to ISO 16014-4 or from a calibration curve constructed using absolute molecular weight data if using size-exclusion chromatography coupled with light-scattering detection (SEC-LS) as described in ISO 16014-5.
PDF Catalog
PDF Pages | PDF Title |
---|---|
1 | compares BS ISO 16014-1:2019 |
2 | TRACKED CHANGES Text example 1 — indicates added text (in green) |
32 | National foreword |
36 | Foreword |
37 | 1 Scope 2 Normative references 3 Terms and definitions |
38 | 4 Principle 5 Reagents 5.1 Eluent 5.2 Reagent for column evaluation 5.3 Molecular weight standards |
39 | 5.4 Reagent for flow rate marker (internal standard) 5.5 Additives 6 Apparatus 6.1 General 6.2 Eluent reservoir 6.3 Pumping system |
40 | 6.4 Injector |
41 | 6.5 Columns 6.5.1 General 6.5.2 Determination of theoretical plate number |
42 | 6.5.3 Determination of resolution factor |
43 | 6.5.4 Determination of asymmetry factor 6.6 Detector |
44 | 6.7 Tubing 6.8 Temperature control 6.9 Recorder and plotter 6.10 Data-processing system 6.11 Other components 7 Procedure |
45 | 8 Data acquisition and processing 8.1 Data acquisition 8.2 Evaluation of data and correction of chromatograms 8.3 Data processing 8.3.1 Baseline determination 8.3.2 Determination of calculation range |
47 | 9 Expression of results 9.1 Calibration curve |
48 | 9.2 Calculation of average molecular weight 9.3 Differential molecular weight distribution curve |
49 | 9.4 Cumulative molecular weight distribution curve 10 Precision |
50 | 11 Test report 11.1 General 11.2 Apparatus and measurement parameters 11.3 Calibration of the system 11.4 Calibration curve |
51 | 11.5 Results |
52 | Annex A (informative) Supplementary information |
53 | Annex B (informative) Narrow molecular weight distribution standards |