ISO 21490:2022
Rubber and rubber products — Determination of 2-mercaptobenzothiazole content by high performance liquid chromatography (HPLC)
This document specifies a quantitative test method to determine the 2-mercaptobenzothiazole content in rubber and rubber products by high performance liquid chromatography (HPLC).
This document delivers a method for quantifying 2-mercaptobenzothiazole in rubber products for a better selection of curing conditions.
This document provides a method to follow the curing of rubber with sulfur- and benzothiazole-based accelerators using a chemical measurement which is complementary to the classical rheometric technique.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents and materials
6 Apparatus
7 Sampling
8 Procedure
8.1 Sample preparation
8.2 Chromatographic conditions
8.3 Preparation of standard working solutions and the calibration curve
8.4 HPLC-DAD testing
9 Test results
9.1 Calibration curve
9.2 Calculation
10 Precision
11 Test report
Annex A (informative) Schematic chemical reactions during curing or rubber with sulfenamide that gives 2-MBT
Annex B (informative) A gradient programme of HPLC
Annex C (informative) Calibration
Annex D (informative) Spectrum and chromatogram of 2-MBT
Annex E (informative) Precision
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents and materials
6 Apparatus
7 Sampling
8 Procedure
8.1 Sample preparation
8.2 Chromatographic conditions
8.3 Preparation of standard working solutions and the calibration curve
8.4 HPLC-DAD testing
9 Test results
9.1 Calibration curve
9.2 Calculation
10 Precision
11 Test report
Annex A (informative) Schematic chemical reactions during curing or rubber with sulfenamide that gives 2-MBT
Annex B (informative) A gradient programme of HPLC
Annex C (informative) Calibration
Annex D (informative) Spectrum and chromatogram of 2-MBT
Annex E (informative) Precision
Bibliography