GB/T 22035-2008 English PDF

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GB/T 22035-2008: Test of vegetable fat in milk and milk products -- Gas chromatography
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 22035-2008	139	Add to Cart	3 days	Test of vegetable fat in milk and milk products -- Gas chromatography	Valid

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Basic data

Standard ID: GB/T 22035-2008 (GB/T22035-2008)
Description (Translated English): Test of vegetable fat in milk and milk products -- Gas chromatography
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: C53
Classification of International Standard: 67.100.01
Word Count Estimation: 6,649
Date of Issue: 2008-06-17
Date of Implementation: 2008-10-01
Quoted Standard: GB/T 6682
Adopted Standard: ISO 3594-1976, MOD
Regulation (derived from): National Standard Approval Announcement 2008 No.10 (Total No.123)
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 test by gas chromatography milk and dairy vegetable oil method. This standard applies to milk and dairy products in vegetable oil qualitative test.

GB/T 22035-2008: Test of vegetable fat in milk and milk products -- Gas chromatography

---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.
Test of vegetable fat in milk and milk products. Gas chromatography ICS 67.100.01 C53 National Standards of People's Republic of China Milk and dairy products in vegetable oil inspection Gas chromatography (ISO 3594. 1976Milkfat-Detectionofvegetable fatbygas-liquidchromatographyofsterols, MOD) Posted 2008-06-17 2008-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This revised standard adopts the International Standard ISO 3594. 1976 "cream of vegetable detected by Gas Chromatography sterol Law" (in English). Taking into account the situation of our country, the present standard and ISO 3594. 1976 The main differences are as follows. Preparation of samples --- increase; --- Modify the analysis step, increase the preparation of test solution, saponification, extraction step; --- Modify GC reference conditions; --- International Standard replacing the test report reg; --- Remove the chromatogram international standards, increase the informative annex A of cholesterol, β- sitosterol typical gas chromatogram; --- Write format, in accordance with the terms of the standard GB/T 1.1-2000 "Standardization Guide Part 1. The structure and coding standards Write the rules "and GB/T 20001.4-2001" Rules for drafting standards - Part 4. Methods for chemical analysis. " Appendix A of this standard is an informative annex. The standard proposed by the People's Republic of China Ministry of Agriculture. This standard by the National Standardization Technical Committee of animal husbandry. This standard is drafted by. Ministry of Agriculture, Food Quality Supervision and Testing Center (Shanghai). The main drafters of this standard. Olympus Han, Meng Jin, Wu Rong, Heya Bin, Huang Feifei, Zhang Hui. Milk and dairy products in vegetable oil inspection Gas chromatography

1 Scope

This standard specifies the test by gas chromatography milk and dairy products in vegetable oil method. This standard applies to milk and dairy products in vegetable oil qualitative test.

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 6682 analytical laboratory use specifications and test methods (GB/T 6682-1992, neq ISO 3696. 1987) Principle 3 After sample ethanolic potassium hydroxide saponified with ether, aliphatic petroleum ether, the solvent was removed by distillation or evaporation, and extracted with n-hexane Take the free sterols, analyzed by gas chromatography. If the measured sample containing β- sitosterol, containing vegetable oil component is determined.

4 Reagents and materials

All reagents if not stated specifications, were of analytical grade; experimental water if not specified, shall comply with the provisions of GB/T 6682's. 4.1 hexane (C6H6). chromatography. 4.2 Ethanol (C2H5OH). 95%. Ether 4.3 [(C2H5) 2O]. 4.4 petroleum ether. boiling range 30 ℃ ~ 60 ℃. 4.5 anhydrous sodium sulfate (Na2SO4). 4.6 Potassium hydroxide solution. 500g/L. Weigh 500g of potassium hydroxide (KOH), after the transfer to dissolved 1000mL volumetric flask, constant volume, and mix. 4.7 cholesterol and β- sitosterol mixed standard solution. Each ml of each single component sterol is 0.4mg. Cholesterol were accurately weighed and β- sitosterol standard 10mg, dissolved in hexane (4.1) and set the volume to the same 25mL volumetric flask in. Shake, stored in a refrigerator, valid for 60d. 5. Apparatus Usual laboratory equipment and the following. 5.1 Gas chromatograph. equipped with a flame ionization detector (FID). 5.2 Analytical Balance (a sense of volume 0.01g). 5.3 Analytical balance (the amount being 0.1mg). 5.4 rotary evaporator. 5.5 grinding mouth Erlenmeyer flask. 250mL, can be connected to an air condenser.

6 Sample preparation

6.1 Liquid samples Weighing 20g sample, accurate to 0.01g, placed grinding mouth Erlenmeyer flask (5.5) in. ......

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