GB/T 35252-2017 English PDF

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GB/T 35252-2017: Animal and vegetable fats and oils -- Determination of 2-thiobarbituric acid value -- Direct method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 35252-2017	199	Add to Cart	3 days	Animal and vegetable fats and oils -- Determination of 2-thiobarbituric acid value -- Direct method	Valid

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Basic data

Standard ID: GB/T 35252-2017 (GB/T35252-2017)
Description (Translated English): Animal and vegetable fats and oils -- Determination of 2-thiobarbituric acid value -- Direct method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: X14
Classification of International Standard: 67.200.10
Word Count Estimation: 10,114
Date of Issue: 2017-12-29
Date of Implementation: 2018-07-01
Regulation (derived from): National Standards Bulletin 2017 No. 32
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

GB/T 35252-2017: Animal and vegetable fats and oils -- Determination of 2-thiobarbituric acid value -- Direct 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.
Animal and vegetable fats and oils - Determination of 2-thiobarbituric acid value - Direct method ICS 67.200.10 X14 National Standards of People's Republic of China Animal and vegetable oils and fats Determination of 2 - thiobarbituric acid value of the direct method 2017-12-29 Posted 2018-07-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard proposed by the State Food Administration. This standard by the National Cereals and Oils Standardization Technical Committee (SAC/TC270) centralized. This standard was drafted by the State Food Administration of Science. Drafters of this standard. Luan Xia, Wang Ying Yao, Ma Rong, Zhang Fan, Feng Ren-dong. Animal and vegetable oils and fats Determination of 2 - thiobarbituric acid value of the direct method

1 Scope

This standard specifies the method of direct determination of 2-thiobarbituric acid (TBA value) without the separation of secondary oxidation products of fat. This standard applies to animal and vegetable oils and fats, fatty acids and esters, glycol esters and so on.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. Laboratory use specifications and test methods for analysis GB/T 6682-2008 GB/T 15687 Animal and vegetable fats sample preparation

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 2-thiobarbituric acid value 2-thiobarbituric acid value The absorbance, measured at 530 nm, of a 1 mg sample reacted with 1 mL of 2-thiobarbituric reagent. Note 2 - thiobarbituric acid value without units, but 1mg sample dissolved in 100mL solvent and reagent measured absorbance value of a measurement unit.

4 principle

The secondary oxidation product of the oil reacts with 2-thiobarbituric acid to form a condensate having a maximum absorption peak at a wavelength of 530 nm, Its absorbance.

5 reagent

5.1 1-butanol. Moisture content of not more than 0.2%. 5.2 2-thiobarbituric acid. 5.3 TBA Reagents. Weigh.200 mg of 2-thiobarbituric acid in a 100 mL volumetric flask and dilute to the mark with 1-butanol. in room temperature Place 12h ~ 15h to dissolve 2-thiobarbituric acid. Then filter with filter paper to remove insoluble residue. The filtrate was titrated with 1-butanol 100mL, and stored at 0 ℃ ~ 4 ℃ refrigerator spare. TBA reagents are stored and used for less than 1 week. 5.4 All reagents are of analytical grade, the experimental water should meet the requirements of GB/T 6682-2008 three water.

6 equipment

6.1 volumetric flask .25mL, 100mL. ......

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