SN/T 1740-2006 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 1740-2006	679	Add to Cart	3 days	Determination of clofentezine residues in foods for import and export. Gas chromatography mass spectrometry method	Obsolete

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Basic data

Standard ID: SN/T 1740-2006 (SN/T1740-2006)
Description (Translated English): Determination of clofentezine residues in foods for import and export. Gas chromatography mass spectrometry method
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: C53
Word Count Estimation: 17,129
Date of Issue: 2006-01-26
Date of Implementation: 2006-08-16
Regulation (derived from): Industry Standard Notice 2006 No. 4 (total of 76)
Issuing agency(ies): General Administration of Customs
Summary: This standard specifies the import and export food clofentezine residues by gas chromatography mass spectrometry. This standard applies to export citrus fruits, apples, spinach, broccoli, beef liver, chicken kidney clofentezine residues and confirmation.

SN/T 1740-2006: Determination of clofentezine residues in foods for import and export. Gas chromatography mass spectrometry 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 clofentezine residues in foods for import and export.Gas chromatography mass spectrometry method Book of the People's Republic of China Entry and Exit Inspection and Quarantine Method for detecting tetramethylpyrazine residues in imported and exported foods Gas chromatography tandem mass spectrometry Released on.2006-01-26 Implementation of.2006-08-16 People's Republic The General Administration of Quality Supervision, Inspection and Quarantine issued

Foreword

Appendix A and Appendix B of this standard are informative annexes. This standard is proposed and managed by the National Certification and Accreditation Supervision Committee. This standard was drafted. Jilin Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China. The main drafters of this standard. Wang Mingtai, Yan Jun, Liu Zhiyan, Song Liguo, Li Aijun, Meng Jie. This standard is the first industry standard for entry-exit inspection and quarantine. Method for detecting tetramethylpyrazine residues in imported and exported foods Gas chromatography tandem mass spectrometry

1 Scope

This standard specifies the gas chromatography-mass spectrometry method for the determination of tetramethylpyrazine residues in imported and exported foods. This standard applies to the determination and confirmation of tetracyclazine residues in citrus, apple, spinach, broccoli, beef liver and chicken kidney.

2 Principle

The sample is extracted by shaking with water + acetone (1+4), liquid-liquid partitioning in methylene chloride, purification by gel column, and solid phase of Florisil. After the column is purified, the eluent is concentrated and dissolved to a constant volume, and then detected by gas chromatography-mass spectrometry and quantified by external standard method.

3 reagents and materials

Unless otherwise specified, the reagents used were of analytical grade and the water was double distilled water. 3.1 Acetone. 3.2 Dichloromethane. 3.3 cyclohexane. 3.4 Ethyl acetate. 3.5 n-hexane. 3.6 anhydrous sodium sulfate. 650 ° C burning for 4h, stored in a sealed container for use. 3.7 Aqueous sodium sulfate solution. 20g/L. 3.8 Fluoril-silica solid phase extraction column. 1.0 g, or equivalent. 3.9 Tetrapyridazine standard (Clofentezine, C14H8Cl2N4, 74115-24-5). purity ≥ 99%. 3.10 Standard stock solution. Accurately weigh the appropriate amount of tetrazine standard and prepare a standard reserve of 100μg/mL with acetone. Solution. 3.11 Standard working solution. Dilute with acetone to a standard working solution of the applicable concentration as needed.

4 Instruments and equipment

4.1 Gas Chromatography-Mass Spectrometer. equipped with a mass selective detector. 4.2 Gel Chromatograph. equipped with a unit pump and fraction collector. 4.3 Oscillator. 4.4 Rotate the evaporator. 4.5 Anhydrous sodium sulfate column. 7.5 cm × 1.5 cm (inside diameter), containing 5 cm of anhydrous sodium sulfate. 4.6 stoppered conical flask. 250mL. 4.7 Separating funnel. 250 mL. 4.8 Concentrated bottle. 50mL, 250mL. 4.9 Filter. 0.45 μm. ......

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