Home Cart Quotation About-Us
www.ChineseStandard.net
SEARCH

SN/T 4048-2014 English PDF

Q: How long will the true-PDF of English version of SN/T 4048-2014 be delivered?

Upon your order, we will start to translate SN/T 4048-2014_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time.

Q: Can I share the purchased PDF of SN/T 4048-2014_English with my colleagues?

Yes. The purchased PDF of SN/T 4048-2014_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Q: Does the price include tax/VAT?

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). Avoidance of Double Taxation Agreements (DTAs) between Singapore and 100+ Countries: https://www.iras.gov.sg/taxes/international-tax

Q: Do you accept my currency other than USD?

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.

US$599.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
SN/T 4048-2014: Determination of quaternary ammonium compounds in food for export. LC-MS/MS method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 4048-2014	599	Add to Cart	5 days	Determination of quaternary ammonium compounds in food for export. LC-MS/MS method	Valid

Similar standards

GB 5009.271 GB 5009.22 SN/T 2641 SN/T 4041 SN/T 4045 SN/T 4039

Basic data

Standard ID: SN/T 4048-2014 (SN/T4048-2014)
Description (Translated English): Determination of quaternary ammonium compounds in food for export. LC-MS/MS method
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: X04
Classification of International Standard: 67.050
Word Count Estimation: 23,298
Date of Issue: 12/1/2014
Date of Implementation: 5/1/2015
Quoted Standard: GB/T 6682
Regulation (derived from): State-Quality-Inspection-accreditation [2014] 614
Issuing agency(ies): General Administration of Customs
Summary: This standard specifies the five kinds of food for export quaternary liquid chromatography - mass spectrometry/mass spectrometry. This standard applies to pork, beef, apples, spinach, rice, sugar, raw milk dodecyl trimethyl ammonium bromide (DTAB), dodecy

SN/T 4048-2014: Determination of quaternary ammonium compounds in food 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 quaternary ammonium compounds in food for export. LC-MS/MS method People's Republic of China Entry-Exit Inspection and Quarantine Industry Standard Determination of quaternary ammonium salts in exported foods Liquid chromatography-mass spectrometry/mass spectrometry LC-MS/MSmethod Released on.2014-11-19 2015-05-01 implementation People's Republic The General Administration of Quality Supervision, Inspection and Quarantine issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. Please note that some of the contents of this document may involve patents. Publication of this document The organization is not responsible for identifying these patents. This standard is proposed and managed by the National Certification and Accreditation Administration. This standard was drafted. Jilin Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China, China Academy of Inspection and Quarantine. The main drafters of this standard. Li Ling, Kang Mingqin, Zhang Xun, Wu Lianpeng, Hu Tingting, Wu Jian, Yan Jun, Chen Mingyan, Chen Dongdong. Determination of quaternary ammonium salts in exported foods Liquid chromatography-mass spectrometry/mass spectrometry

1 Scope

This standard specifies the liquid chromatography-mass spectrometry/mass spectrometry method for the determination of five quaternary ammonium salts in exported foods. This standard applies to pork, beef liver, apple, spinach, rice, sugar, raw milk, dodecyl trimethyl ammonium bromide (DTAB), dodecane Dimethylbenzylammonium chloride (C12-BAC), tetradecyldimethylbenzylammonium chloride (C14-BAC), cetyldimethylbenzyl chloride Determination and confirmation of ammonium (C16-BAC), dimercaptodimethylammonium chloride (DDAC).

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply 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 experimental methods

3 Method summary

The sample was extracted with methanol or methanol solution, purified by solid phase extraction column, and determined by liquid chromatography-mass spectrometry/mass spectrometry and quantified by external standard method.

4 reagents and materials

Unless otherwise specified, the reagents used are chromatographically pure, and the water is the first grade water specified in GB/T 6682. 4.1 Methanol. 4.2 Formic acid. 4.3 Acetonitrile. 4.4 Ammonium formate. excellent grade. 4.5 Ammonia water (content 25%, volume fraction). excellent grade pure. 4.6 Reference material. dodecyltrimethylammonium bromide (CAS number. 1119-94-4, C15H34BrN), dodecyldimethylbenzylammonium chloride (CAS. 139- 07-1, C21H38NCl), tetradecyldimethylbenzylammonium chloride (CAS) No.. 139-08-2, C23H42ClN), hexadecyldimethylbenzylammonium Chloride, CAS No.. 122-18-9, C25H46ClN), didocyldimethylammonium chloride (didoctyldimethylammonium chloride, CAS No.. 7173-51-5, C22H48ClN), purity is ≥98%. 4.7 5% aqueous ammonia solution (volume fraction). Take 5.0 mL of ammonia water (4.5), dilute with water and dilute to 100 mL. 4.8 90% methanol solution (volume fraction). Take 900 mL of methanol, dilute with water and dilute to 1 L. 4.9 80% methanol solution (volume fraction). Take 800 mL of methanol, dilute with water and dilute to 1 L. 4.10 2% formic acid methanol solution. Take 20 mL of formic acid, dilute with methanol and dilute to 1 L. 4.11 50mmol/L ammonium formate (containing 0.1% formic acid solution). Accurately weigh 3.153g ammonium formate (4.4), and accurately absorb 1mL formic acid (4.2), dilute with water and bring up to 1L. ......

Image

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of SN/T 4048-2014_English be delivered?

Answer: Upon your order, we will start to translate SN/T 4048-2014_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of SN/T 4048-2014_English with my colleagues?

Answer: Yes. The purchased PDF of SN/T 4048-2014_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.