GB/T 25807-2020 in English
VALIDm-Carbamidoaniline hydrochloride
- Issued on:2020-11-19
- Implemented on:2021-10-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$127.00
《GB/T 25807-2020间脲基苯胺盐酸盐》由TC134（全国染料标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。
Introduction
Core changes in the standard revision
| Revision items | 2010 edition | 2020 edition | Technical significance |
|---|---|---|---|
| Chromatographic column temperature | Not specified | 35℃ | Improve separation efficiency |
| Filter specifications | G3 | G4 | Improve filtration accuracy |
| Tolerance of water-insoluble matter | Not specified | ≤0.03% | Strengthen quality control |
Analysis of key technical requirements
The standard stipulates that urea-aminocaproic acid hydrochloride is divided into two grades: superior product and qualified product. The key indicator differences are as follows:
- Purity requirement: superior product ≥97.50%, qualified product ≥96.50%
- Impurity control: urea-aminocaproic acid content superior product ≤2.00%, qualified product ≤3.00%
- Water-insoluble matter: superior product ≤0.05%, qualified product ≤0.10%
Application case: HPLC condition optimization
A production enterprise adopts C8 The best separation effect was obtained using an ODS column (150 mm × 4.6 mm, 3 μm) with a mobile phase of methanol-acetic acid buffer (10:90) at a column temperature of 35 °C, resulting in a detection limit of 0.05% for m-decanoyldiamine.
Recommendations for the implementation of the standard
- Strictly implement the minimum sampling volume requirement of 200g in the sampling process to ensure the representativeness of the sample
- The solution temperature must be controlled within the range of 0-5℃ during the diazotization method
- The water-insoluble matter detection should use G4 sand core filter and operate at constant weight
- The packaging and storage must be protected from light and moisture, and aluminum foil composite bags are recommended
Technology evolution analysis
This standard took 10 years to revise, mainly reflecting three major technological advances: 1) The detection method has evolved from simple titration to HPLC-UV combined technology; 2) The quality control index has expanded from a single purity requirement to multi-component control; 3) The degree of parameterization of experimental conditions has been significantly improved. These improvements have increased the standard's degree of international compliance by about 40%.
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