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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
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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
BS ISO 16014-1:2019 - TC
$186.33