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SN/T 2923-2011 PDF English

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SN/T 2923-2011: Determination of terephthailic acid and isophthalic acid in food for export
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SN/T 2923-2011English389 Add to Cart 3 days [Need to translate] Determination of terephthailic acid and isophthalic acid in food for export

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Basic data

Standard ID SN/T 2923-2011 (SN/T2923-2011)
Description (Translated English) Determination of terephthailic acid and isophthalic acid in food for export
Sector / Industry Commodity Inspection Standard (Recommended)
Classification of Chinese Standard X04
Word Count Estimation 15,166
Date of Issue 2011-05-31
Date of Implementation 2011-12-01
Regulation (derived from) National-Quality-Inspection-accreditation (2011) 291
Issuing agency(ies) General Administration of Customs
Summary This standard specifies the export of food in sample preparation and liquid chromatography detection methods terephthalic acid (IPA) and isophthalic acid (IPA) residues. This standard applies to canned meat, beans and beverages determination of terephthalic acid and isophthalic acid residues, fish.

SN/T 2923-2011: Determination of terephthailic acid and isophthalic acid in food for export



---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 terephthailic acid and isophthalic acid in food for export People's Republic of China Entry-Exit Inspection and Quarantine Standards Food exports of terephthalic acid and isophthalic acid Determination of residues Issued on. 2011-05-31 2011-12-01 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard was drafted. People's Republic of China Shanghai Entry-Exit Inspection and Quarantine Bureau, Beijing Science and Technology Co., Ltd. Dike Ma. The main drafters of this standard. Fang Xiaoming, Chu Qinghua, Tang Yifeng, Wang Chuan now, Xu Xianghua, Li Wenbin. Food exports of terephthalic acid and isophthalic acid Determination of residues

1 Scope

This standard specifies the exports in food sample preparation and liquid chromatography detection methods terephthalic acid (TPA) and isophthalic acid (IPA) residues. This standard applies to canned meat, fish, beans and beverages Determination of terephthalic acid and isophthalic acid residues in.

2 Method summary

Canned meat, fish and legumes sample with 0.1% sodium bicarbonate solution and extracted samples of Coke direct ultrasonic degassing, after solid phase extraction (SPE), Liquid Chromatography - ultraviolet detector, external standard.

3 Reagents and materials

Unless otherwise specified, the reagents were of analytical grade, double distilled water or deionized water to adapt. 3.1 Methanol. HPLC grade. 3.2 glacial acetic acid. 3.3 chloroform. 3.4 sodium bicarbonate (NaHCO3). 3.5 sodium bicarbonate solution (0.1%). Weigh 1g of sodium bicarbonate to volume with water to 1L. 3.6 Methanol - water (2,080, volume ratio). 3.7 Methanol - water (40 60, by volume) containing 1% glacial acetic acid. in 400mL methanol (3.1) was added 10mL of water and 600mL of glacial acetic acid. 3.8 pairs of terephthalic acid and isophthalic acid standard substance. not less than 99.0% purity. 3.9 pairs of terephthalic acid and isophthalic acid standard stock solution. accurately weighed amount of standard methanol were formulated as a 1mg/mL standard stock Liquid, dark, 4 ℃ save the stock solution is diluted to the appropriate concentration of methanol in the middle as needed. 3.10 PLS (pyrrolidin-styrene polymer) SPE.200mg/6mL, before use 5mL methanol and 5mL water rinse, Paul Holding cylinder moist.

4 instruments and equipment

4.1 liquid chromatograph. with UV - visible detector or diode array detector. 4.2 Solid phase extraction device. 4.3 thermostat nitrogen blowing means. 4.4 homogenizer. 4.5 vortex mixer. 4.6 Centrifuge. maximum speed 4000r/min. 4.7 Glass tube. 15mL. 4.8 0.45μm filtration membrane organic phase needle. ...

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