GB/T 22967-2008 English PDF

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GB/T 22967-2008: Determination of β-estradiol residues in milk and milk powder -- Gas chromatography-negative-ion chemical ionization mass spectrometry method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 22967-2008	229	Add to Cart	3 days	Determination of β-estradiol residues in milk and milk powder -- Gas chromatography-negative-ion chemical ionization mass spectrometry method	Valid

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Basic data

Standard ID: GB/T 22967-2008 (GB/T22967-2008)
Description (Translated English): Determination of ��-estradiol residues in milk and milk powder -- Gas chromatography-negative-ion chemical ionization mass spectrometry method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: X04
Classification of International Standard: 67.050
Word Count Estimation: 10,117
Date of Issue: 2008-12-31
Date of Implementation: 2009-05-01
Regulation (derived from): National Standard Approval Announcement 2008 No.26 (Total No.139)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the milk and milk powder ��- estradiol residues in gas chromatography-negative chemical ionization mass spectrometry. This standard applies to the determination of milk and milk powder ��- estradiol residues. This standard method detection limit: Milk 0 25 ��g/kg, milk 2 ��g/kg.

GB/T 22967-2008: Determination of β-estradiol residues in milk and milk powder -- Gas chromatography-negative-ion chemical ionization 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 β-estradiol residues in milk and milk powder. Gas chromatography-negative-ion chemical ionization mass spectrometry method ICS 67.050 X04 National Standards of People's Republic of China Determination of milk and milk powder β- estradiol residues Gas chromatography - negative chemical ionization mass spectrometry Posted 2008-12-31 2009-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

The Standard Appendix A, Appendix B is an informative annex. This standard is proposed and managed by the State Administration of Quality Supervision, Inspection and Quarantine. This standard was drafted. People's Republic of China Qinhuangdao Exit Inspection and Quarantine, People's Republic of China Shandong Entry-Exit Inspection and Quarantine Bureau. The main drafters of this standard. Wang Jianhua, Zhang Yibing, Guo Cui, Wang Tong environment, Sun Zhongsong, Pang Guofang. Determination of milk and milk powder β- estradiol residues Gas chromatography - negative chemical ionization mass spectrometry

1 Scope

This standard specifies the milk and milk powder β- estradiol residues in gas chromatography - negative chemical ionization mass spectrometry. This standard applies to the determination of milk and milk powder β- estradiol residues. The standard method detection limit. milk 0.25μg/kg, milk 2μg/kg.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 6379.1 measurement methods and results of Accuracy (trueness and precision) - Part 1. General principles and definitions (GB/T 6379.1-2004, ISO 5725-1.1994, IDT) GB/T 6379.2 measurement methods and results of Accuracy (trueness and precision) - Part 2. Determine the standard measurement method to repeat Of the basic methods of reproduction (GB/T 6379.2-2004, ISO 5725-2.1994, IDT) GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD) Principle 3 Milk and milk powder estradiol after enzymatic hydrolysis with acetonitrile as the extraction and extraction agent, protein precipitant, solid-phase extraction column purification, After acylation derivatized by gas chromatography - negative chemical ionization mass spectrometry and selected ion monitoring mode measurement, internal standard.

4 Reagents and materials

Unless otherwise specified, reagents were of analytical grade water as a water GB/T 6682 regulations. 4.1 β- glucuronidase/arylsulfatase glucosidase. Helixpomatia, per ml β- glucuronidase 100000 units per ml of sulfuric acid Esterase ≤1000 units. 4.2 Methanol. chromatographically pure. 4.3 acetonitrile. chromatography. 4.4 ethyl acetate. chromatography. 4.5 hexane. chromatographically pure. 4.6 pyridine. chromatography. 4.7 isooctane. chromatography. 4.8 n-propanol. AR. 4.9 Derivatization reagent. pentafluoro benzoyl chloride, in the dark, damp environment frozen storage. 4.10 sodium bicarbonate. 4.11 sodium acetate trihydrate. 4.12 sodium chloride. 4.13 0.1% acetic acid solution. Pipette 0.1mL of glacial acetic acid, water volume 100mL. ......

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