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