GB/T 21512-2008Determination of tert-butylhydroquinone(TBHQ) in edible vegetable oil (English PDF)
食用植物油中叔丁基对苯二酚（TBHQ）的测定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
March 18, 2008
Implementation date
August 1, 2008
Scope
GB/T 21512-2008 is the English-translated version of 食用植物油中叔丁基对苯二酚（TBHQ）的测定.
GB/T 21512-2008 is the Chinese standard "Determination of tert-butylhydroquinone(TBHQ) in edible vegetable oil".
Its scope clause reads: 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 °C 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. Its clauses include gas chromatography.
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Document preview — GB/T 21512-2008
National Standard of the People's Republic of China
- ICS
- 67.200.10
- Classification
- X 14
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Gas Chromatography
- 3.1 Principle
- 3.2 Reagents
- 3.3 instruments and equipment
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 °C 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.
3.2.5 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 °C 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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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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