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SN/T 1950-2007 English PDF

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SN/T 1950-2007: Determination of organphosphorus pesticides multiresidues in tea for import and export--Gas chromatography
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PDF similar to SN/T 1950-2007


Standard similar to SN/T 1950-2007

NY/T 939   NY/T 2334   SN/T 2051   SN/T 5650   SN/T 5601   SN/T 1949   

Basic data

Standard ID SN/T 1950-2007 (SN/T1950-2007)
Description (Translated English) Determination of organphosphorus pesticides multiresidues in tea for import and export--Gas chromatography
Sector / Industry Commodity Inspection Standard (Recommended)
Classification of Chinese Standard X04
Classification of International Standard 67.050
Word Count Estimation 14,163
Date of Issue 2007-08-06
Date of Implementation 2008-03-01
Regulation (derived from) National-accreditation-Science [2011] 63
Issuing agency(ies) General Administration of Customs
Summary This standard specifies the tea dichlorvos, methamidophos, acephate, phorate, omethoate, disulfoton, iprobenfos, dimethoate, leather fly phosphorus, chlorpyrifos, fenitrothion, sulfur phosphorus, isocarbophos, methidathion, ethion, triazophos, Finland parathion, EPN, phosmet, phosalone, pyrazosulfuron phosphorus and other 21 kinds of organophosphorus pesticide residues by gas chromatographic method. This standard applies to tea 21 kinds of organophosphorus pesticide residues.

SN/T 1950-2007: Determination of organphosphorus pesticides multiresidues in tea for import and export--Gas chromatography


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Determination of organphosphorus pesticides multiresidues in tea for import and export - Gas chromatography Exit inspection and quarantine industry standard book People's Republic of China Import and export a variety of organophosphorus pesticides in tea Residue detection methods Gas Chromatography Posted 2007-08-06 2008-03-01 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released

Foreword

Appendix A of this standard is an informative annex. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard was drafted. People's Republic of China Hunan Exit Inspection and Quarantine. The main drafters. Zhang Ying, Yan Hongfei, Sun Fei, Huang Zhiqiang, Wang Meiling, Li Yongjun. This standard is the first release of the entry-exit inspection and quarantine industry standards. Import and export a variety of organophosphorus pesticides in tea Residue detection methods Gas Chromatography

1 Scope

This standard specifies the tea dichlorvos, methamidophos, acephate, phorate, omethoate, phorate, IBP, dimethoate, Hypoderma Phosphorus, chlorpyrifos, fenitrothion, parathion, Isocarbophos, methidathion, ethion, triazophos, Finland parathion, parathion benzene, phosmet, phosalone, Pyrazosulfuron phosphorus and other 21 kinds of organophosphorus pesticides - Gas chromatographic method amounts. This standard applies to the determination of tea 21 kinds of organophosphorus pesticide residues.

2 Method summary

After the samples were immersed in water (1 + 1, volume ratio) was extracted with ethyl acetate and ethyl acetate + n-hexane, over a charcoal column purification, distribution Preparation of flame photometric detector gas chromatograph measured, quantified by external standard.

3 Reagents and materials

Unless otherwise specified, all reagents were of analytical grade, water is distilled water. 3.1 ethyl acetate. redistilled. 3.2 hexane. redistilled. 3.3 acetone. redistilled. 3.4 anhydrous sodium. 650 ℃ burning 4h. 3.5 dichlorvos, methamidophos, acephate, phorate, omethoate, phorate, IBP, dimethoate, Hypoderma phosphorus, chlorpyrifos, fenitrothion, Parathion, Isocarbophos, methidathion, ethion, triazophos, Finland parathion, parathion benzene, phosmet, phosalone, topiramate ethyl phosphorus and other 21 kinds of pesticide standard Associate Products. purity greater than or equal to 98%. 3.6 pesticide standard solution. Accurately weigh an appropriate amount of a single organophosphorus pesticide standards, paired with acetone stock solution of 100μg/mL using When diluted to the appropriate concentration of the mixed standard working solution as needed with ethyl acetate. 3.7 activated carbon SPE. 3mL activated charcoal column (SUPELCO or equivalent person).

4 instruments and equipment

4.1 Gas chromatograph. equipped with a flame photometric detector (FPD), phosphorus filter (526nm). 4.2 Rapid Mixer. 4.3 Centrifuge. 3000r/min. 4.4 Multifunction trace of sample handling devices or other equivalent instrument. 4.5 plug graduated centrifuge tube. 5mL, 10mL. 4.6 glass tubes. 10mL. 4.7 beak straw.

5 Sample Preparation and Storage

5.1 Sample Preparation Take a representative sample 500g, crushed with a grinder and sieve through a 2.0mm hole. Mixing, are divided into two as a sample, dispense into

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