SN/T 0292: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| SN/T 0292-2010 | English | 559 |
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Determination of bentazon residues in cereals for import and export. GC method
| Obsolete |
SN/T 0292-2010
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| SN 0292-1993 | English | 479 |
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Method for the determination of bentazonresidues in cerceals for export
| Obsolete |
SN 0292-1993
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PDF similar to SN/T 0292-2010
Basic data | Standard ID | SN/T 0292-2010 (SN/T0292-2010) | | Description (Translated English) | Determination of bentazon residues in cereals for import and export. GC method | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | X11 | | Classification of International Standard | 67.060 | | Word Count Estimation | 14,124 | | Date of Issue | 2010-03-02 | | Date of Implementation | 2010-09-16 | | Older Standard (superseded by this standard) | SN/T 0292-1993 | | Regulation (derived from) | National Quality Inspection (2010) 98 | | Issuing agency(ies) | General Administration of Customs | | Summary | This standard specifies the rice bentazone residues by gas chromatography detection methods. This standard applies to rice bentazone residues detected. | SN/T 0292-2010: Determination of bentazon residues in cereals for import and export. GC 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 bentazon residues in cereals for import and export.GC method
Exit inspection and quarantine industry standard book People's Republic of China
Replacing SN 0292-1993
Importers in Grains BENTAZON Residue Detection
Gas chromatography
Issued on. 2010-03-02
2010-09-16 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
Foreword
This standard replaces SN 0292-1993 "cereals for export bentazone residues in."
This standard compared with SN 0292-1993 main changes are as follows.
--- Changing the name of the standard;
--- Deleted the sampling part;
--- Modified GC conditions;
--- Added Appendix A.
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. Heilongjiang People's Republic of China Exit Inspection and Quarantine.
The main drafters of this standard. Yang Chang-chih, Hong celebrate, Ma Xu, Tang Minshun.
This standard was first published on December 28, 1993, this is the first revision.
Importers in Grains BENTAZON Residue Detection
Gas chromatography
1 Scope
This standard specifies the method of gas chromatography rice bentazone residues.
This standard applies to rice bentazone residues detected.
2 Method summary
The sample remaining in the first BENTAZON acetone extraction with an acidic solution, and nitrogen blow acetone, sodium sulfate solution was added, and then the n-hexyl
Alkyl extraction. The extract was concentrated, methylation, silica solid phase extraction cartridge. Cleaning fluid attached by gas chromatography with electron capture detector, external
Standard method.
3 Reagents and materials
Unless otherwise specified, all reagents were of analytical grade, water is distilled water or equivalent purity.
3.1 acetone. chromatography.
3.2 hexane. chromatographically pure.
3.3 Methanol. chromatographically pure.
3.4 ethanol.
3.5 anhydrous ether. chromatography.
3.6 anhydrous sodium. Burning 4h at 650 ℃, stored in a desiccator.
3.7 hydrochloric acid.
3.8 potassium hydroxide.
3.9 acetone - n-hexane (2 + 98, volume ratio).
3.10 sodium sulfate solution. 20g of the calcined anhydrous sodium sulfate (3.6) in deionized water, diluted to 1L.
Hydrochloric acid solution 3.11. 1mol/L. Take 90mL hydrochloric acid (3.7) was dissolved in 1000mL of deionized water.
Potassium hydroxide solution 3.12. 0.6g/mL. Weigh 60g of potassium hydroxide (3.8) dissolved in 100mL deionized water.
3.14 diazomethane solution. containing 10mL of potassium hydroxide solution (3.12), mixed 35mL ethanol (3.4), and 10mL of anhydrous ether
The dual-port fluid distillation flask, placed on a magnetic stirrer hot plate in a water bath, temperature 70 ℃. The stir into the bottle. Connected a dropping funnel
And efficient condenser, a condenser in series two 125mL flask as a receiving flask. Add 10mL of anhydrous ethyl ether in a second flask,
And the inlet tube inserted below the surface of anhydrous ether. Two receiving flask was cooled in an ice bath. Side by side with a magnetic stirrer dropping funnel
Distillate distillation was stopped when the solution bottle pale yellow. The two combined liquid receiver flask, and then a water bath at 70 ℃ distilled as the distillate which
Solution of diazomethane. This was placed in the refrigerator in a sealed preservation, shelf life of one month.
3.15 bentazone Standard. bentazone (bentazon), C10H12N2O3S, CASN o. 25057-89-0 purity ≥99.5%.
3.16 bentazone standard stock solution. accurately weighed amount bentazone standard product with acetone dubbed the concentration of standard stock 100μg/mL of
Preparation of liquid, standard stock solution can be stored for 6 months at -18 ℃ condition.
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