GB/T 23209-2008 English PDF

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GB/T 23209-2008: Determination of lutein in milk powder -- HPLC-UV method
Status: Obsolete

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 23209-2008	319	Add to Cart	3 days	Determination of lutein in milk powder -- HPLC-UV method	Obsolete

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Basic data

Standard ID: GB/T 23209-2008 (GB/T23209-2008)
Description (Translated English): Determination of lutein in milk powder -- HPLC-UV method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: X04
Classification of International Standard: 67.050
Word Count Estimation: 8,813
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.27 (Total No.140)
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 provides high-performance liquid chromatographic method milk lutein (lutein) 's. This standard applies to the determination of milk in lutein. This standard method detection limit of 0. 05mg/kg.

GB/T 23209-2008: Determination of lutein in milk powder -- HPLC-UV 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 lutein in milk powder. HPLC-UV method ICS 67.050 X04 National Standards of People's Republic of China Determination of milk powder lutein LC - UV detection method 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, Shenzhen People's Republic of China Entry-Exit Inspection and Quarantine Bureau. The main drafters of this standard. Bo, Xieli Qi, Lin Yankui, Jinbao Hui, Wu Fengqi, Pang Guofang. Determination of milk powder lutein LC - UV detection method

1 Scope

This standard specifies a high performance liquid chromatographic method Milk Powder lutein (lutein) is. This standard applies to the determination of milk powder lutein. The standard method detection limit of 0.05mg/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 powder lutein extracted with acetone and concentrated by high performance liquid chromatograph, external standard.

4 Reagents and materials

Water is in line with GB/T 6682 provided a water. 4.1 Methanol. chromatographically pure. 4.2 methyl tert-butyl ether. chromatography. 4.3 dichloromethane. chromatography. 4.4 acetone. pure class distinctions. 4.5 tert-butyl-p-cresol (BHT). purity > 99%. 4.6 acetone solution containing 0.1% BHT. The Weigh 0.500gBHT (4.5) in 500mL volumetric flask, dissolve and fixed with acetone (4.4) To volume. 4.7 lutein. purity > 96.2%. 4.8 standard stock solution (1000mg/L). Weigh 10.0mg standard substance was dissolved in dichloromethane (4.3) and dilute to 10mL capacity Flask, at -80 ℃ refrigerator stored. 4.9 standard intermediate solution. lessons standard stock solution in 100mL flask with methanol to volume, mix thoroughly to prepare a 20mg/L standard intermediate solution. The intermediate standard solution was dispensed in liquid vials and stored at -80 ℃ refrigerator in the dark. 4.10 standard solution. according to the sensitivity and the need to use, diluted with acetone (4.6) into a standard working solution, the standard solution Need temporary preparation before analysis. 4.11 Membrane. 0.2μm. ......

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