SN/T 1737.2-2007 English PDF

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SN/T 1737.2-2007	639	Add to Cart	3 days	Determination of herbicides residues. Part 2: Determination of diphenyl ether herbicides residues in cereal and oilseed by GC/MS method	Obsolete

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Basic data

Standard ID: SN/T 1737.2-2007 (SN/T1737.2-2007)
Description (Translated English): Determination of herbicides residues. Part 2: Determination of diphenyl ether herbicides residues in cereal and oilseed by GC/MS method
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: B17
Word Count Estimation: 16,181
Date of Issue: 2007-12-24
Date of Implementation: 2008-07-01
Regulation (derived from): National-accreditation-Science [2011] 63
Issuing agency(ies): General Administration of Customs
Summary: This standard specifies the grains and oilseeds cycloheptane grass ether, methoxy nitrofen, aclonifen, carboxymethyl nitrofen, F 1, 10 grass ketone, Lactofen, nitrofen, oxyfluorfen, B carboxylase fluoride grass ether nine kinds of diphenyl ether herbicides residues gas chromatography/mass spectrometry. This standard applies to rice and soybeans 9 kinds of diphenyl ether herbicides residues detection and confirmation.

SN/T 1737.2-2007: Determination of herbicides residues. Part 2: Determination of diphenyl ether herbicides residues in cereal and oilseed by GC/MS 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 herbicides residues.Part 2. Determination of diphenyl ether herbicides residues in cereal and oilseed by GC/MS method Exit inspection and quarantine industry standard book People's Republic of China Herbicide residues in Part 2. Determination of Cereals by Gas Chromatography/Mass Spectrometry And oilseeds in diphenyl ether herbicides Residues Posted 2007-12-24 2008-07-01 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released

Foreword

SN/T 1737 "herbicide residues method" is divided into two parts. --- Part 1. Gas chromatography-tandem mass spectrometry Cereals and oilseeds amide herbicide residues in; --- Part 2. Determination of Cereals and oilseeds in biphenyl ether herbicides by Gas Chromatography/Mass Spectrometry. This section SN/T 1737 Part 2. Appendix A of this section is an informative annex. This section proposed and managed by the National Certification and Accreditation Administration Committee. This section was drafted by. People's Republic of China, Shenzhen CIQ. The main drafters of this section. Jinbao Hui, Xieli Qi, Lin Yankui, Blue Fang, Jin Pei, Weidong, Lin Li, Zhao Qionghui. The first part of the Department of Inspection and Quarantine issued by industry standards. Herbicide residues in Part 2. Determination of Cereals by Gas Chromatography/Mass Spectrometry And oilseeds in diphenyl ether herbicides Residues

1 Scope

SN/T 1737 provisions of this part of the cereal grains and oilseeds cycloheptyl grass ether, methoxy nitrofen, aclonifen, carboxymethyl nitrofen, slightly fluorine grass ketone, Lactofen, nitrofen, oxyfluorfen, Fluoroglycofen diphenyl ether nine kinds of herbicide residues in GC/MS detection method. This section applies to rice and soya of 9 ether herbicide residues detected and confirmed.

2 Method summary

The sample was extracted with acetonitrile, Florisil solid-phase extraction (SPE) and gas chromatography/mass spectrometer, external standard.

3 reagent material

Unless otherwise indicated, the reagents used were of analytical grade water as a water. 3.1 acetone. chromatography. 3.2 acetonitrile. pure class distinctions. 3.3 hexane. chromatographically pure. 3.4 anhydrous sodium sulfate. After burning 650 ℃ 4h, placed in a desiccator. 3.5 diphenyl ether herbicides standards. carboxymethyl nitrofen (C14 H9Cl2NO5, CAS No. 42576-02-3), slightly fluorine grass ketone (C13H7F3N2O5, CASN o. 15457-05-3), nitrofen (C12H7Cl2NO3, CAS No. 1836-75-5), oxyfluorfen (C15H11ClF3NO4, CASN o. 42874-03-3), aclonifen (C12H9ClN2O3, CASN o. 74070-46-5), ethyl fluoroglycofen (C18H13ClF3NO7, CASN o. 77501-90-7), purity greater than 97.0%; lactofen (C19H15ClF3NO7, CASN o. 77501-63-4) is greater than 91.0% purity. Cycloheptyl grass ether (C18 H26 O2, CAS No. 87818-31-3) and methoxy nitrofen (C13H9Cl2NO4, CASN o. 32861-85-1) as the standard liquid, at a concentration of 10mg/L, the solvent of n-hexane and acetonitrile respectively. 3.6 Herbicide standard solution. a) standard stock solution. accurately weighed amount of aclonifen, carboxymethyl nitrofen, slightly fluorine grass ketone, lactofen, nitrofen, oxyfluorfen Ether, ethyl fluoroglycofen were dissolved in acetone and dilute to brown volumetric flask, concentration equivalent to 1000mg/L, reserve reservoir The following -18 ℃; b) an intermediate mixed standard solution. Imbibe right amount aclonifen, carboxymethyl nitrofen, slightly fluorine grass ketone, lactofen, nitrofen, ethoxyethyl Fluoride grass ether, ethyl fluoroglycofen standard stock solution in a brown volumetric flask with acetone to the mark, various diphenyl ether herbicides A concentration of 10mg/L, this intermediate solution was stored below -18 ℃; c) mixed standard working solution. acetone mixed with standard intermediate solution as required by serial dilution, and adding other herbicidal diphenyl ether Like concentration of cyclic ethers and methoxy heptyl grass nitrofen, with nine kinds of mixed standard working solution diphenyl ether herbicides, hybrid Standard working solution stored at 0 ℃ ~ 4 ℃. 3.7 Florisil SPE column. 500mg, 3mL.

4 instruments and equipment

4.1 Gas chromatography - mass spectrometry with electron bombardment source. 4.2 Vortex device. ......

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