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BS ISO 16014-1:2019

BS ISO 16014-1:2019

$142.49

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 2019 24
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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
2 National foreword
6 Foreword
7 1 Scope
2 Normative references
3 Terms and definitions
8 4 Principle
5 Reagents
5.1 Eluent
5.2 Reagent for column evaluation
5.3 Molecular weight standards
9 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
10 6.4 Injector
11 6.5 Columns
6.5.1 General
6.5.2 Determination of theoretical plate number
12 6.5.3 Determination of resolution factor
13 6.5.4 Determination of asymmetry factor
6.6 Detector
14 6.7 Tubing
6.8 Temperature control
6.9 Recorder and plotter
6.10 Data-processing system
6.11 Other components
7 Procedure
15 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
17 9 Expression of results
9.1 Calibration curve
18 9.2 Calculation of average molecular weight
9.3 Differential molecular weight distribution curve
19 9.4 Cumulative molecular weight distribution curve
10 Precision
20 11 Test report
11.1 General
11.2 Apparatus and measurement parameters
11.3 Calibration of the system
11.4 Calibration curve
21 11.5 Results
22 Annex A (informative) Supplementary information
23 Annex B (informative) Narrow molecular weight distribution standards

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BS ISO 16014-1:2019
$142.49