GB/T 21512-2008 English PDF

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GB/T 21512-2008: Determination of tert-butylhydroquinone (TBHQ) in edible vegetable oil
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21512-2008	189	Add to Cart	3 days	Determination of tert-butylhydroquinone (TBHQ) in edible vegetable oil	Valid

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Basic data

Standard ID: GB/T 21512-2008 (GB/T21512-2008)
Description (Translated English): Determination of tert-butylhydroquinone (TBHQ) in edible vegetable oil
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: X14
Classification of International Standard: 67.200.10
Word Count Estimation: 8,814
Date of Issue: 2008-03-18
Date of Implementation: 2008-08-01
Quoted Standard: GB/T 5524; GB/T 15687
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 use of gas chromatography, liquid chromatography tert-butyl hydroquinone (TBHQ) principle, analysis step, , reagents, instruments and equipment and precision of the results of the calculation. This standard applies to the determination of the lower melting point of edible vegetable oil TBHQ content. This standard does not apply to the determination above 35��C higher than the melting point of edible vegetable oils TBHQ content.

GB/T 21512-2008: Determination of tert-butylhydroquinone (TBHQ) in edible vegetable oil

---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 tert-butylhydroquinone (TBHQ) in edible vegetable oil ICS 67.200.10 X14 National Standards of People's Republic of China Edible vegetable oil in tertiary butyl hydroquinone (TBHQ) Determination Posted 2008-03-18 2008-08-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

The standard reference American Association of Official Analytical Chemists (AOAC) official method 983.15 (sixteenth edition) "grease and butter phenolic antioxidant Determination of oxidant liquid chromatography, "China National Standard GB/T 5009.30-2003" food tertiary butyl hydroxy anisole (BHA) And 2,6-di-tert-determination of cresol (BHT) of "light industry standards QB2395-1998" Food additive Tertiary benzene Diol (TBHQ) "the relevant principles and technology content, on an experimental basis, by simplifying procedures, and methods to improve the operability Accuracy and formulate. The standard proposed by the National Food Authority. This standard by the National Standardization Technical Committee OILS. This standard was drafted. Beijing foodstuff and Inspection. The main drafters of this standard. Ruan Ling, Shang Yane, Guo Qin, Wang Zheng Ping, Xia Tianwen. Edible vegetable oil in tertiary butyl hydroquinone (TBHQ) Determination

1 Scope

This standard specifies the use of gas chromatography, liquid chromatography-tert-butyl hydroquinone (TBHQ) principle, reagents, instruments and equipment, sub Step analysis, the results of calculation and precision. This standard applies to the determination of edible vegetable oil in a lower melting point TBHQ content. This standard does not apply to a melting point higher than that measured more than 35 ℃ edible vegetable oils TBHQ content. The standard quantitative limit. gas chromatography was 0.001g/kg, liquid chromatography was 0.006g/kg. The standard gas chromatography method for the arbitration.

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 5524 Inspection of vegetable oils for sampling, and sample method GB/T 15687 grease sample preparation

3 Gas Chromatography

3.1 Principle TBHQ in edible vegetable oils by the volume fraction of 80% ethanol extraction, concentration, after constant volume, measured by gas chromatography, external standard method Quantified. 3.2 Reagents Unless otherwise indicated, the agents of the criteria used were of analytical grade, water is distilled or deionized water or equivalent purity. 3.2.1 95% ethanol. 3.2.2 ethanol. 3.2.3 carbon disulfide. 3.2.4 80% ethanol solution. Measure 80mL95% ethanol and 15mL of distilled water, the two-liquid mixing. 3.2.5 TBHQ standard stock solution (1000μg/mL). Weigh accurately TBHQ reference reagent (molecular weight 166.22, content ≥98.0%) 0.1000g, into a small beaker, after using ethanol 1mL crystals dissolve TBHQ, about 5mL was added carbon disulfide, Transferred to 100mL volumetric flask. After the beaker was washed with ethanol and then 1mL, about 5mL of carbon disulfide was added, the flask is transferred to , And washed three times with carbon disulfide at least beaker, dilute to 100mL, dubbed the concentration of 1000μg/mL standard stock solution of TBHQ, set In a brown bottle under 4 ℃ stored for up to 6 months. 3.3 instruments and equipment 3.3.1 Gas chromatograph. with a hydrogen flame ionization detector (FID). 3.3.2 Mixer. vortex mixer. 3.3.3 colorimetric tube. 25mL. 3.3.4 porcelain evaporating dish. 60mL. ......

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