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SN/T 4676-2016: Determination of biurea in foods for export - LC-MS/MS method
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| SN/T 4676-2016 | English | 229 |
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Determination of biurea in foods for export - LC-MS/MS method
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SN/T 4676-2016
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Basic data | Standard ID | SN/T 4676-2016 (SN/T4676-2016) | | Description (Translated English) | Determination of biurea in foods for export - LC-MS/MS method | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | X04 | | Word Count Estimation | 10,165 | | Date of Issue | 2016-12-12 | | Date of Implementation | 2017-07-01 | | Regulation (derived from) | State-Quality-Inspection-Accredidation (2016) No.590 | | Issuing agency(ies) | General Administration of Customs | SN/T 4676-2016: Determination of biurea in foods for export - LC-MS/MS 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.
Determination of biurea in foods for export-LC-MS/MS method
People's Republic of China Exit Inspection and Quarantine standards
Determination of bis-urea in food for export
Liquid chromatography - tandem mass spectrometry
2016-12-12 released
2017-07-01 implementation
People's Republic of China
General Administration of Quality Supervision, Inspection and Quarantine released
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard is proposed and managed by the National Certification and Accreditation Administration Committee.
This standard was drafted by China Academy of Inspection and Quarantine, People's Republic of China CIQ.
The main drafters of this standard. Wang Jun Su, Peng Tao, Hu Xueyan, Guan Tianheng, Chen Hui, Chang Qiaoying, Yu deposit display, Wang Guomin.
Determination of bis-urea in food for export
Liquid chromatography - tandem mass spectrometry
1 Scope
This standard specifies the liquid food in the export of bisulfan-tandem mass spectrometry determination and verification methods.
This standard applies to bread, bread, fried dough sticks, instant noodles and other foods in the determination of two urea.
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.
GB/T 6682 analytical laboratory water specifications and test methods
3 method summary
The diurea in the sample is extracted by water oscillation, oxidized by potassium permanganate and converted to azodicarbonamide, then sodium p-toluenesulfinate
Derivatization of azodicarbonamide into p-toluenesulfonyl semicarbazide, determination and confirmation by liquid chromatography-tandem mass spectrometry, and quantification by internal standard method.
4 reagent material
Unless otherwise specified, the reagents used are of analytical grade, water GB/T 6682 provisions of a water.
4.1 n-hexane. Chromatographic purity.
4.2 dimethyl sulfoxide. Chromatographic purity.
4.3 acetonitrile. Chromatographic purity.
4.4 Formic acid. Chromatographic purity.
4.5 Ammonium acetate. Chromatographic purity.
4.6 glacial acetic acid.
4.7 Sodium p-toluenesulfinate. Purity greater than 95%.
4.8 potassium ferrocyanide.
4.9 Zinc acetate.
4.10 potassium permanganate.
4.11 2.5mmol/L sodium p-toluenesulfinate solution Weigh 0.044g sodium p-toluenesulfinate, add acetonitrile - water (1. 1, volume ratio) solution
Dilute and dilute to 100mL.
4.12 1.0mol/L zinc acetate solution Weigh 183g zinc acetate, add 30mL glacial acetic acid dissolved, diluted with water to 1L.
4.13 0.25mol/L potassium ferrocyanide solution Weigh 106g of potassium ferrocyanide, dissolved in water and diluted to 1L.
4.14 10g/L potassium permanganate solution Weigh 1g potassium permanganate, dissolved in water and diluted to 100mL. Store at room temperature, valid for 90d.
4.15 0.2% formic acid - 2mmol/L ammonium acetate solution Take 2mL formic acid and 0.154g ammonium acetate, diluted with water and dilute to 1L.
4.16 Reference material Biadio urea Molecular formula C2H6N4O2, relative molecular mass 118.1, CAS No. 110-21-4; 13C2,15N2-biuret
Sub-formula 13C2, 15N2-C2H6N4O2, relative molecular mass 122.0, CAS number 1189730-21-9.
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