GB/T 4499-2016 in English
VALIDRubber,vulcanized―Determination of antidegradants―Thin layer chromatographic method
- Issued on:2016-10-13
- Implemented on:2017-05-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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《GB/T 4499-2016硫化橡胶 防老剂的测定 薄层色谱法》由TC35（全国橡胶与橡胶制品标准化技术委员会）归口，TC35SC2（全国橡胶与橡胶制品标准化技术委员会通用试验方法分会）执行，主管部门为中国石油和化学工业联合会。
Introduction
1. Standard Overview
This standard "Thin layer chromatography for determination of antioxidants in vulcanized rubber" (GB/T4499-2016) specifies the method for determining antioxidants in vulcanized rubber using thin layer chromatography. It is applicable to the detection of aldehyde amines, ketone amines, secondary amines, p-phenylenediamines, bisphenols, polyphenols and phosphate antioxidants.
2. Technical Background and Evolution
This standard replaces GB/T4499-1997. The main technical improvements include:
- The qualitative description of antioxidant standards has been added;
- The description of spotting volume and use of developing agent has been optimized;
- The requirement to retain two decimal places for Rf values has been clarified.
3. Comparison table of standard frameworks
| Standard version | Scope of application | Main technical improvements |
|---|---|---|
| GB/T4499-2016 | Determination of antioxidants in vulcanized rubber and compounded rubber | - Added qualitative description of standard products- Optimized the description of spot volume- Clarified the requirements for Rf value accuracy |
| GB/T4499-1997 | Determination of antioxidants in vulcanized rubber | - Undefined qualitative description of standard products- Brief description of spot volume- Unclear requirements for Rf value accuracy |
4. Implementation Suggestions
Laboratory Operation Suggestions:
- Ensure that the purity of the reagents used meets the requirements, especially the colorimetric and developing agents.
- Choose a suitable developing agent combination (such as toluene, acetone, etc.) according to the specific sample conditions.
- The Rf value should be recorded accurately to two decimal places and compared with the standard spectrum.
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