SN/T 0278: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| SN/T 0278-2009 | English | 959 |
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Determination of methamidophos residues in foods for import and export
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SN/T 0278-2009
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| SN 0278-1993 | English | 399 |
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Method for the determination of methamidophosresidues in vegetables for export
| Obsolete |
SN 0278-1993
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PDF similar to SN/T 0278-2009
Basic data | Standard ID | SN/T 0278-2009 (SN/T0278-2009) | | Description (Translated English) | Determination of methamidophos residues in foods for import and export | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | X26 | | Word Count Estimation | 24,297 | | Date of Issue | 2009-07-07 | | Date of Implementation | 2010-01-16 | | Older Standard (superseded by this standard) | SN 0278-1993 | | Regulation (derived from) | National Quality Inspection [2009] No. 290 | | Issuing agency(ies) | General Administration of Customs | | Summary | This standard specifies the import and export of methamidophos residues in food by gas chromatography and liquid chromatography mass spectrometry/mass spectrometry confirmatory method. This standard applies to import rice, green beans, spinach, peas, citrus, grapes, cabbage, chestnuts, tea, pork, chicken, liver, tilapia, honey methamidophos residues and confirmation. | SN/T 0278-2009: Determination of methamidophos residues in foods for import and export---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 methamidophos residues in foods for import and export
Exit inspection and quarantine industry standard book People's Republic of China
Replacing SN 0278-1993
Importers and methamidophos residues in food
Detection method
Posted 2009-07-07
2010-01-16 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
Foreword
This standard replaces SN 0278-1993 "Residues of methamidophos detection vegetables for export."
This standard compared with SN 0278-1993, the main changes are as follows.
--- Expand the scope of use;
--- Increased LC - MS/MS confirmation methods;
--- Canceled SN 0278-1993 "2 sampling and sample preparation," adds "Sample Preparation and Storage";
--- Improved sample pretreatment technology roadmap.
The Standard Appendix A and Appendix B are informative appendices.
This standard is proposed and managed by the National Certification and Accreditation Administration Committee.
This standard was drafted. People's Republic of China Guangdong Entry-Exit Inspection and Quarantine of Hunan People's Republic of China
Bureau, People's Republic of China Zhejiang Entry-Exit Inspection and Quarantine of Jiangsu People's Republic of China.
The main drafters of this standard. Chen Jie, Wang Lan, Xie Jianjun, Linhai Dan, Wu Ying Xuan, Zhang Ying, Ding Huiying, Shen Chong-yu.
This standard was first published in 1993, this is the first revision.
Importers and methamidophos residues in food
Detection method
1 Scope
This standard specifies the gas chromatography and liquid chromatography imported and exported food Residues of methamidophos detected - MS/MS confirmation methods.
This standard applies to the import and export of rice, green beans, spinach, peas, citrus, grapes, cabbage, chestnuts, tea, pork, chicken, liver, Luo
Fish, honey methamidophos residues measured and confirmed.
2 Method summary
The samples were extracted with ethyl acetate or acetonitrile, by solid phase extraction column purification, using gas chromatography (flame photometric detector) determined outside
Standard method. LC - MS/MS.
3 Reagents and materials
Unless otherwise specified, reagents were of analytical grade, water is deionized water.
3.1 acetone.
3.2 ethyl acetate.
3.3 n-hexane.
3.4 acetonitrile. chromatography.
3.5 methanol.
3.6 anhydrous sodium. 650 ℃ burning 4h, cooled in a desiccator to room temperature, store in an airtight desiccator.
3.7 sodium chloride.
3.8 hexane - acetone (2 + 1, volume ratio). Take hexane 100mL, was added 50mL of acetone, and mix.
3.9 methamidophos standard substance. not less than 97.0% purity.
3.10 methamidophos standard stock solution. accurately weighed amount of methamidophos, formulated with ethyl acetate to a concentration of 1.00mg/mL standard stock
liquid. The solution was stored at -18 ℃.
3.11 methamidophos intermediate standard solution. Imbibe appropriate amount of standard stock solution, diluted with ethyl acetate to a concentration of 100.0μg/mL standard
Quasi intermediate solution. The solution was stored at -18 ℃.
3.12 methamidophos standard working solution. Before using the intermediate standard solution was diluted to the appropriate concentration of standard working solution as needed with ethyl acetate.
3.13 graphitized carbon black SPE. 250mg, 3mL, or equivalent person.
3.14 Florisil SPE column. 1000mg, 2mL, or equivalent person.
3.15 amino SPE.200mg, 3mL, or equivalent person.
3.16 CHROMABONDXTR SPE. 3000mg, 15mL, or equivalent person.
3.17 microporous membrane. 0.45μm, organic.
4 instruments and equipment
4.1 Gas chromatograph. with flame photometric (FPD-P) detector.
4.2 Liquid chromatography - mass spectrometry/mass spectrometry. equipped with electrospray ionization source.
4.3 Balance. a sense of 0.1mg and 0.01g.
4.4 food stamp mill.
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