SN/T 2073-2022 English PDFSN/T 2073: Historical versions
Basic dataStandard ID: SN/T 2073-2022 (SN/T2073-2022)Description (Translated English): (Determination of 7 nicotinic pesticide residues in food of plant origin for export by liquid chromatography-mass spectrometry/mass spectrometry) Sector / Industry: Commodity Inspection Standard (Recommended) Classification of Chinese Standard: C53 Classification of International Standard: 67.050 Date of Issue: 2022-03-14 Date of Implementation: 2022-10-01 Older Standard (superseded by this standard): SN/T 2073-2008 Issuing agency(ies): General Administration of Customs SN/T 2073-2008: Determination of imidacloprid residue in plant products for import and export. LC-MS/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 imidacloprid residue in plant products for import and export.LC-MS/MS method Exit inspection and quarantine industry standard book People's Republic of China Importers of plant products imidacloprid Detection liquid chromatography tandem mass spectrometry Posted 2008-04-29 2008-11-01 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released ForewordThe Standard Appendix A and Appendix B are informative. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard by the People's Republic of China Zhejiang Exit Inspection and Quarantine is responsible for drafting. The main drafters of this standard. Xie Wen, Ding Huiying, Jiang Xiaoying, Xijun Yang, Qian Yan, Huang Lei Fang. This standard is the first release of the entry-exit inspection and quarantine industry standards. Importers of plant products imidacloprid Detection liquid chromatography tandem mass spectrometry1 ScopeThis standard specifies the plant product imidacloprid in sample preparation and liquid chromatography tandem mass spectrometry. This standard is applicable to the detection of soybeans, broccoli, carrots, chestnuts, rice, pepper and tea imidacloprid.2 Method summarySamples were extracted with acetonitrile imidacloprid, extract and then Florisil and activated carbon mixed, purified, liquid chromatography and tandem mass spectrometry Confirmed, external standard.3 Reagents and materialsUnless otherwise specified, all reagents were of analytical grade, double distilled water. 3.1 acetonitrile. HPLC fractions. 3.2 hexane. HPLC fractions. 3.3 acetone. HPLC fractions. 3.4 Methanol. HPLC fractions. 3.5 formic acid. HPLC fractions. 3.6 sodium chloride. 3.7 Activated Carbon. size 0.038mm ~ 0.124mm (120 mesh to 400 mesh). 3.8 anhydrous sodium. 650 ℃ burning 4h, cooled in a desiccator to room temperature and stored in a sealed bottle aside. 3.9 Florisil. size 0.15mm ~ 0.25mm (60 mesh to 100 mesh). 650 ℃ calcined 4h, 130 ℃ activated before use 4h, Cooled in a desiccator to room temperature, add 1% of water deactivation aside. 3.10 0.15% aqueous formic acid solution. 0.15mL acid dissolved in 100mL of water. 3.11 acetone - n-hexane (1 + 1, volume ratio). 3.12 methanol - water (1 + 1, volume ratio). 3.13 standard imidacloprid (imidacloprid, CASN o.138261-41-3, C9H10ClN5O2). not less than 98.5% purity. 3.14 imidacloprid standard stock solution. Weigh the right amount of standard (3.13), dissolved in methanol solution at 100μm/mL. 1 ℃ ~ 4 ℃ Refrigerated. Valid for six months. 3.15 standard curve working solution. dilute the standard stock solution required blank sample solution to 5ng/mL, 10ng/mL, 50ng/mL, mixed standard working solution 100ng/mL, 250ng/mL of the sample when the sample amount is 2g, the sample contains the equivalent of 5μg/kg, 10μg/kg, 50μg/kg, 100μg/kg, 250μg/kg imidacloprid. 3.16 anhydrous sodium sulfate column. 80mm × 40mm (inner diameter) cylindrical funnel bottom pad 5mm cotton, refill 40mm anhydrous sodium sulfate. 3.17 Purification Column.200mm × 15mm (inner diameter) glass column, at the bottom of the pad about 5mm and about 20mm cotton anhydrous sodium sulphate, 5g Dover Rory mixing silica and 0.2g of activated carbon packed, top plus about 20mm over anhydrous sodium sulfate, 20mL hexane prior to use pre-wash.4 instruments and equipment4.1 high performance liquid chromatography - tandem mass spectrometry. equipped with electrospray ionization source. 4.2 rotary evaporator. ...... |
