GB/T 22991-2008 English PDF

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GB/T 22991-2008: Determination of virginiamycin residue in bovine milk and milk powder -- LC-MS-MS method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 22991-2008	229	Add to Cart	3 days	Determination of virginiamycin residue in bovine milk and milk powder -- LC-MS-MS method	Valid

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Basic data

Standard ID: GB/T 22991-2008 (GB/T22991-2008)
Description (Translated English): Determination of virginiamycin residue in bovine milk and milk powder -- LC-MS-MS method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: X04
Classification of International Standard: 67.050
Word Count Estimation: 10,155
Date of Issue: 2008-12-31
Date of Implementation: 2009-05-01
Quoted Standard: GB/T 6379.1; GB/T 6379.2; GB/T 6682
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 raw milk and pure milk of virginiamycin Ml (virginiamycinMl) Determination of residual liquid chromatography-tandem mass spectrometry. This standard applies to the determination of virginiamycin Ml residues in raw milk and pure milk. This standard method detection limit: raw milk virginiamycin Ml was 0. 25��g/L, pure milk powder virginiamycin Ml2. 0��g/kg.

GB/T 22991-2008: Determination of virginiamycin residue in bovine milk and milk powder -- LC-MS-MS 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 virginiamycin residue in bovine milk and milk powder. LC-MS-MS method ICS 67.050 X04 National Standards of People's Republic of China Determination of virginiamycin residues in milk and milk powder Liquid chromatography - tandem 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 of People's Republic of China. This standard was drafted. People's Republic of China Qinhuangdao Exit Inspection and Quarantine, People's Republic of China Liaoning Entry-Exit Inspection and Quarantine Bureau. The main drafters of this standard. Song Wenbin, Li Yichen, Dongzhen Lin, Mike Sui, Clue red, Xue Dafang, a Zhang, LI Zhen-Rong, Pang Guofang. Determination of virginiamycin residues in milk and milk powder Liquid chromatography - tandem mass spectrometry

1 Scope

This standard specifies the pure raw milk and milk powder virginiamycin M1 (virginiamycinM1) Determination of the amount of residual liquid chromatography - tandem Mass spectrometry. This standard applies to the determination of virginiamycin M1 residue in raw milk and pure milk powder. The detection limit of this standard. raw milk virginiamycin M1 is 0.25μg/L, pure milk powder virginiamycin M1 is 2.0μg/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 Sample remaining virginiamycin M1 + acetonitrile were mixed in methanol extract vortex extraction, centrifugation, and the supernatant with ammonium dihydrogen phosphate Buffer solution was diluted to C18 solid phase extraction column purification. The eluent of virginiamycin M1 separated and extracted with chloroform to remove Aqueous layer. Nitrogen blowing chloroform to dryness, treated with ammonium formate buffer solution and the mixture was dissolved in methanol and set the volume for liquid chromatography - tandem mass spectrometer.

4 Reagents and materials

Unless otherwise indicated, the reagents used were of analytical grade water as a water GB/T 6682 regulations. 4.1 acetic acid. 4.2 formic acid. Chromatographic pure. 4.3 Methanol. chromatographically pure. 4.4 acetonitrile. chromatography. 4.5 chloroform. chromatography. 4.6 ammonium dihydrogen phosphate. pure class distinctions. 4.7 Ammonium. pure class distinctions. 4.8 ammonium dihydrogen phosphate solution. 0.1mol/L, weighed 11.50g ammonium dihydrogen phosphate (4.6), dissolved in water and dilute to 1000mL. 4.9 ammonium dihydrogen phosphate solution. 0.01mol/L, amount of 0.1mol/L ammonium dihydrogen phosphate solution (4.8) 100mL, diluted with water to the 1000mL. 4.10 ammonium formate buffer solution. 0.12mol/L, pH = 3.2, weighed 7.56g ammonium formate (4.7), dissolved in water, adjusted with formic acid (4.2) pH to 3.2, the volume to 1000mL. 4.11 ammonium formate buffer. 0.003mol/L, pH = 3.2, amount of 25.0mL ammonium formate buffer (4.10), diluted with water to the ......

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