SN/T 0292-2010 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 0292-2010	559	Add to Cart	3 days	Determination of bentazon residues in cereals for import and export. GC method	Obsolete
SN 0292-1993	479	Add to Cart	4 days	Method for the determination of bentazonresidues in cerceals for export	Obsolete

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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Older Standard (superseded by this standard): SN/T 0292-1993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

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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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