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BS EN ISO 13885-2:2021

BS EN ISO 13885-2:2021

$167.15

Gel permeation chromatography (GPC) – N,N-Dimenthylacetamide (DMAC) as eluent

Published By Publication Date Number of Pages
BSI 2021 34
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This document specifies the determination of the molar-mass distribution and the average molar mass values Mn (number average) and Mw (weight average) of polymers that are soluble in DMAC (N,N-Dimethylacetamide) by gel permeation chromatography (GPC).

NOTE Also known as size exclusion chromatography (SEC).

Even though the chromatograms obtained show good repeatability, it is possible that this method cannot be used with certain polymer types because of specific interactions (e.g. adsorption) within the sample/eluent/column system.

The conditions specified in this document are not applicable to the GPC analysis of polymer samples with Mw values greater than 106 g/mol and/or polymers with elution limits outside the calibration range (see 7.6 and Annex C).

This document includes no correction method (e.g. for the elimination of peak broadening). If absolute molar mass values are required, an absolute method (e.g. membrane osmometry for Mn or light scattering for Mw) can be used.

PDF Catalog

PDF Pages PDF Title
2 National foreword
4 European foreword
7 Foreword
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Principle
5 Apparatus
11 5.1 Eluent supply
5.2 Pump
5.3 Injection system
5.4 Separation columns
13 5.5 Column temperature control
5.6 Detector
14 6 Reagents
7 Calibration of the apparatus
7.1 General
7.2 Specification for the calibration standards
15 7.3 Preparation of the calibration solutions for injection
7.4 Conditions for calibration runs
7.5 Measurement of elution volume
7.6 Plotting the calibration curve
16 8 Sampling
9 Preparation for the test
9.1 Preparation of the injection solution
17 9.2 Preparation of the apparatus
10 Analytical parameters
18 11 Data acquisition and evaluation
11.1 General
11.2 Calculation of the net chromatogram from the raw data
11.2.1 Determination of the baseline
11.2.2 Correction of the measured values and of the net chromatogram
11.2.3 ​Evaluation limits
19 11.3 Calculation of the average values
20 11.4 Calculation of the distribution curves
12 Precision
12.1 General
12.2 Repeatability
21 12.3 Reproducibility
13 Test report
13.1 General
13.2 General data on the equipment and settings
13.2.1 Data on the equipment used
22 13.2.2 Calibration
13.2.3 ​Evaluation
23 13.3 Special data on the sample
24 Annex A (informative) Conversion of experimental parameters for variant column sizes
25 Annex B (informative) Example of a data sheet for a polymer standard
27 Annex C (informative) Explanations
32 Bibliography

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BS EN ISO 13885-2:2021
$167.15