GB/T 13892-2020 in English
VALIDSurface active agents—Determination of iodine value
- Issued on:2020-12-14
- Implemented on:2021-07-01
- File Format:PDF
- Delivery:Via email within 5 business days
$301.00
《GB/T 13892-2020表面活性剂 碘值的测定》由TC63（全国化学标准化技术委员会）归口，TC63SC8（全国化学标准化技术委员会(特种)界面活性剂分会）执行，主管部门为中国石油和化学工业联合会。
Introduction
Analysis of the core content of the standard
Method comparison
| Dimension | Wei's method (arbitration method) | Near-infrared spectroscopy |
|---|---|---|
| Principle | Iodine addition reaction titration | Spectral analysis of hydrogen-containing groups |
| Detection range | 0.1-200g/100g | Modeling coverage range |
| Precision | r≤0.2 (low value) | Reliance on model verification |
| Time consumption | 2-4 hours | 5 minutes/sample |
Key technological innovations
Main updates to the 2020 version of the standard:
- Added Near-infrared spectrometer detection method
- Added 7 spectral analysis terms (Mahalanobis distance, modeling sample set, etc.)
- Improved the outlier processing mechanism
Implementation suggestions
- Method selection: The Weiss method is preferred for arbitration testing, and the near-infrared method can be used for production line quality control
- Modeling requirements: The modeling sample set must include 30+ representative samples with uniform iodine value distribution
- Validation standards: The validation set should cover 95% of the model range, with RSD≤0.2%
Technology evolution analysis
Improvements from the 1992 version to the 2020 version:
- 2012 version: Standardized reagent reference standards
- 2020 version: Introducing modern spectral technology, increasing detection efficiency by 40 times
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