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SN/T 2212-2008: Determination of bensulfuron methyl residues in cereals for import and export. Liquid chromatography
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SN/T 2212-2008: Determination of bensulfuron methyl residues in cereals for import and export. Liquid chromatography

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Determination of bensulfuron methyl residues in cereals for import and export.Liquid chromatography Exit inspection and quarantine industry standard book People's Republic of China Importers in Grains bensulfuron methyl Residues Liquid chromatography detection methods 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. The standard by the China Academy of Inspection and Quarantine is responsible for drafting. The main drafters of this standard. Luo , Caikuai Xia, Chen Zhiling, history Jing, Chen Dongdong, LI Shu-juan, Tang Ying Zhang. This standard is the first release of the entry-exit inspection and quarantine industry standards. Importers in Grains bensulfuron methyl Residues Liquid chromatography detection methods

1 Scope

This standard specifies the import and export in Grains bensulfuron liquid chromatographic method metsulfuron residues. This standard applies to the import and export of rice and brown rice bensulfuron methyl residues test.

2 Method summary

Sample remaining bensulfuron-methyl were extracted with dichloromethane, after hexane extract was purified on a C18 solid phase extraction column and fluorine Rory Silica column purification using UV detector equipped with a liquid chromatograph, external standard.

3 Determination

3.1 Reagents and materials Unless otherwise specified, the reagents were of analytical grade, water re-distilled water. 3.1.1 dichloromethane. 3.1.2 n-hexane. 3.1.3 methanol. 3.1.4 acetonitrile (HPLC grade). 3.1.5 4% aqueous sodium chloride solution. 3.1.6 fluorine Rory silica SPE (Florisil). 6mL or equivalent person. 3.1.7 C18 solid phase extraction column. 3mL or equivalent person. 3.1.8 0.45μm membrane (organic). 3.1.9 bensulfuron methyl standards (English name. Bensulfuron-methyl; CAS. 83055-99-6 Molecular Weight. 410.40; molecule Formula. C16H18N4O7S). purity ≥99%. 3.1.10 bensulfuron methyl standard solution. Accurately weigh an adequate amount of bensulfuron-methyl standards, paired with acetonitrile concentration of about 100.0μg/mL of Standard stock solution (4 ℃ stored for 1 year), then diluted with acetonitrile to a concentration appropriate standard working solution as needed. 3.2 instruments and equipment 3.2.1 liquid chromatograph. Equipped with UV detector. 3.2.2 rotary evaporator. 3.2.3 Sample grinder. 3.2.4 scales (sense of volume 0.0001g). 3.2.5 oscillator. 3.2.6 Erlenmeyer flask. 3.2.7 flask. 3.2.8 separating funnel. 3.2.9 concentrate bottles. 3.3 Preparation of sample preservation Take samples of about 500g pulverized with a pulverizer to all through a 20 mesh sieve into a clean container as a sample, sealed and be marked, 4 ℃ The following save. ...