GB/T 35824-2018 in English
VALIDDetermination of 20 kinds of prohibited and restricted dyestuff in hair dyes—High performance liquid chromatography
- Issued on:2018-02-06
- Implemented on:2018-09-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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《GB/T 35824-2018染发类化妆品中20种禁限用染料成分的测定 高效液相色谱法》由TC257（全国香料香精化妆品标准化技术委员会）归口，TC257SC2（全国香料香精化妆品标准化技术委员会化妆品分会）执行，主管部门为中国轻工业联合会。
Introduction
Professional Interpretation of the National Standard of the People's Republic of China GB/T 35824—2018
Background and Significance of Standard Formulation
GB/T 35824—2018 is an important national standard for the detection of prohibited and restricted dye ingredients in hair dye cosmetics, aiming to ensure the safety and standardization of cosmetics. With the rapid development of the hair dye product market, high performance liquid chromatography has become a key technology for accurate detection.
Comparative analysis of standard frameworks
| Dimensions | Scope | Detection methods | Applicable scenarios |
|---|---|---|---|
| Types of banned and restricted dyes | 20 clearly defined banned and restricted dye ingredients | High performance liquid chromatography (HPLC) | All cosmetics with hair dyeing functions |
| Detection sensitivity | Minimum detection limit 0.001%~0.005% | Quantitative analysis by external standard method, accurate and reliable | Strict screening of high-risk samples |
| Pretreatment methods | 3 options | Solvent extraction + liquid chromatography separation | Flexible application for different sample types |
Technical advantages of high performance liquid chromatography (HPLC)
High performance liquid chromatography can simultaneously detect a variety of restricted dye components through its high separation efficiency and sensitivity. The key steps include: sample pretreatment, mobile phase preparation, chromatographic condition optimization and data analysis.
For example, when determining substances such as o-phenylenediamine and m-phenylenediamine, 50mmol/L phosphate buffer (containing 3% methanol) is used as mobile phase A and methanol is used as mobile phase B, and efficient separation is achieved through programmed temperature increase. The linear range and recovery rate of this method are both excellent.
Standard Implementation Recommendations
- Laboratory Qualification Requirements:HPLC testing equipment and professional technicians.
- Sample Pretreatment:Select appropriate method one, two or three according to the actual sample type to ensure maximum extraction efficiency.
- Quality Control Measures:Regularly calibrate the instrument and use standard substances for method verification to ensure the accuracy of the test results.
- Data Recording and Reporting:Strictly record key data such as peak area and retention time in accordance with standard requirements, and generate standardized test reports.
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