GB/T 35933-2018 in English
VALIDDetermination for drug residues of toxaphene, synthetic pyrethroid, organophosphorus in greasy wool—Gas chromatography method
- 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 35933-2018含脂毛毒杀芬、拟除虫菊酯、有机磷药物残留量的测定 气相色谱法》由TC513（全国纤维标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
GB/T 35933-2018 Standard Overview
National Standard of the People's Republic of China GB/T 35933-2018 "Gas Chromatographic Method for Determination of Toxaphene, Pyrethroids and Organophosphorus Residues in Sebaceous Hair" specifies the method for determining toxaphene, pyrethroids and organophosphorus residues in sebaceous hair using gas chromatograph-electron capture detector and gas chromatograph-nitrogen phosphorus detector. This standard is applicable to the quantitative analysis of multiple pesticide residues in sebaceous hair.
Comparison of standard frameworks
| Project dimension | Gas chromatography determination | High performance liquid chromatography determination | Other methods |
|---|---|---|---|
| Detection range | Toxaphene, pyrethroids, organophosphorus residues | Multiple pesticide residues | Specific types of pesticide residues |
| Sensitivity | High sensitivity, detection limit can reach 0.01~0.04 μg/g | Higher sensitivity | Lower sensitivity |
| Operation complexity | Medium complexity, professional training required | High complexity | Low complexity |
Background of standard formulation and technological evolution
GB/T 35933—2018 was formulated based on the domestic and international demand for pesticide residue detection technology, combined with the technical advantages of gas chromatography, to provide an efficient and accurate analysis method. This standard optimizes the sample pretreatment process on the original basis and introduces more advanced detector technology, significantly improving the detection sensitivity and accuracy.
Instrument and reagent specifications
According to the requirements of the standard, the following instruments and reagents are required: Gas chromatograph-electron capture detector (GC-ECD), Gas chromatograph-nitrogen phosphorus detector, HP-5 capillary column, etc. As for reagents, analytical grade n-hexane, ethyl acetate and high-purity standard substances need to be used.
Implementation recommendations
Sample preparation and processing
- Sampling should be strictly carried out in accordance with GB/T14269 to ensure sample representativeness.
- Laboratory samples must be sealed and stored to avoid contamination.
- The test samples must be kept in a constant temperature and humidity balance to obtain accurate analysis results.
Analysis step optimization
- It is recommended to use a Soxhlet extractor during the extraction process to ensure extraction efficiency.
- Pay attention to the pretreatment of the solid phase extraction column during the purification stage to avoid cross interference.
- It is recommended to use the chromatographic conditions provided by the standard during the determination to ensure the separation effect.
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