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SN/T 4676-2016 English PDF

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US$229.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
SN/T 4676-2016: Determination of biurea in foods for export - LC-MS/MS method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 4676-2016	229	Add to Cart	3 days	Determination of biurea in foods for export - LC-MS/MS method	Valid

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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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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of SN/T 4676-2016_English be delivered?

Answer: Upon your order, we will start to translate SN/T 4676-2016_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of SN/T 4676-2016_English with my colleagues?

Answer: Yes. The purchased PDF of SN/T 4676-2016_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.