SN/T 2237-2008 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 2237-2008	RFQ	ASK	5 days	Determination of strobilurin fungicides residues in foods for import and export. Gas chromatography-mass spectrometry method	Obsolete

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Basic data

Standard ID: SN/T 2237-2008 (SN/T2237-2008)
Description (Translated English): Determination of strobilurin fungicides residues in foods for import and export. Gas chromatography-mass spectrometry method
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: X04
Word Count Estimation: 26,240
Date of Issue: 2008-11-18
Date of Implementation: 2009-06-01
Regulation (derived from): National Quality Inspection [2008] No. 577
Issuing agency(ies): General Administration of Customs
Summary: This standard specifies the food of 11 strobilurin fungicide residues in sample preparation and measurement methods. This standard applies to apples, pears, grapes, cabbage, cucumbers, mushrooms, orange juice, tea drinks, rice, chestnut, beef, pork, chicken, eggs and milk and other foods in 11 kinds of strobilurin fungicide residues determination. Including azoxystrobin (aka azoxystrobin), kresoxim-amine, fluacrypyrim, fluoxastrobin, kresoxim-methyl (known imine bacteria), phenoxy bacteria amine (Z, E-isomers), amine oxime ether bacteria, picoxystrobin, pyraclostrobin (aka one hundred Claritin) and trifloxystrobin (aka trifluoroacetic Min).

SN/T 2237-2008: Determination of strobilurin fungicides residues in foods for import and export. Gas chromatography-mass spectrometry method

---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 strobilurin fungicides residues in foods for import and export.Gas chromatography-mass spectrometry method Exit inspection and quarantine industry standard book People's Republic of China Imported and exported food strobilurin fungicides Residues by Gas Chromatography - Mass Spectrometry Posted 2008-11-18 2009-06-01 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 Qinghai Exit Inspection and Quarantine, Beijing People's Republic of China Entry-Exit Inspection and Quarantine Bureau, People's Republic of China Hebei Exit Inspection and Quarantine. The main drafters of this standard. thin Haibo, Wang Jinhua, Guo Chunhai, Qin Rong, Lu Xiaoyu, Li communication, Jia Hongwei, Zhao Qing, Zhao, Xing Jun. This standard is the first release of the entry-exit inspection and quarantine industry standards. Imported and exported food strobilurin fungicides Residues by Gas Chromatography - Mass Spectrometry

1 Scope

This standard specifies the method of sample preparation and assay of 11 food strobilurin fungicide residues. This standard applies to apples, pears, grapes, cabbage, cucumbers, mushrooms, orange juice, tea, rice, chestnuts, beef, pork, chicken, eggs and 11 kinds of food products such as milk-methoxy-acrylic acid esters Determination fungicide residues. Include azoxystrobin (also known as azoxystrobin), bacteria ether amine, ethyl Mite ester, fluoxastrobin, kresoxim (aka imide bacteria), bacteria phenoxy amine (Z, E two configurations), orysastrobin, picoxystrobin, pyraclostrobin (aka One hundred Claritin) and trifloxystrobin (aka trifluoro-sensitive).

2 Method summary

Sample with an organic solvent ultrasonic extraction, gel permeation chromatography (GPC) system Purification eluent was concentrated and constant volume, gas chromatography - mass spectrometry Determination, external standard.

3 Reagents and materials

Unless otherwise specified, all reagents pesticide grade, double distilled water. 3.1 toluene. 3.2 cyclohexane. 3.3 ethyl acetate. 3.4 acetonitrile. 3.5 methanol. 3.6 chloroform. 3.7 Sodium chloride, analytical grade. 3.8 anhydrous sodium sulfate, AR. Before scorching 4h at 650 ℃, placed after the dryer to cool reserve. 3.9 cyclohexane - ethyl acetate (1/1, volume ratio). 3.10 fungicides standards. purity of greater than or equal to 98%. Eleven kinds of fungicides English name, molecular formula, molecular weight and CAS No. See Appendix A, Table A. 1. 3.11 Standard stock solution. Weigh accurately fungicide standard 50mg (accurate to 0.1mg), was dissolved in toluene (3.1) and transferred to 50mL Brown volumetric flask and dilute to the mark. The concentration of 1mg/mL. The following -18 ℃ dark preservation, storage period of 12 months. 3.12 intermediate standard solution. lessons 1.00mL standard stock solution (3.11) and transferred to 100mL brown volumetric flask with cyclohexane - ethyl acetate (3.9) volume, the concentration of 10μg/mL. 0 ℃ ~ 4 ℃ dark preservation, storage period of one month. Before dilution to the desired concentration of ethyl acetate (3.9), use - to draw a certain amount of intermediate standard solution (3.12) with cyclohexane. 3.13 standard working solution Formulated.

4 instruments and equipment

4.1 Gas chromatography mass spectrometry (GC-MS), equipped with electron impact ionization (EI source). 4.2 gel chromatography purification system (GPC). 4.3 homogenizer. Maximum speed 20000r/min. 4.4 nitrogen blowing instrument. ......

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