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SN/T 4778-2017 English PDF

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US$489.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
SN/T 4778-2017: Determination of streptomycin and dihydrostreptomycin in pollen for export. LC-MS/MS method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 4778-2017	489	Add to Cart	4 days	Determination of streptomycin and dihydrostreptomycin in pollen for export. LC-MS/MS method	Valid

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Basic data

Standard ID: SN/T 4778-2017 (SN/T4778-2017)
Description (Translated English): Determination of streptomycin and dihydrostreptomycin in pollen for export. LC-MS/MS method
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: X83
Word Count Estimation: 21,275
Date of Issue: 2017-05-12
Date of Implementation: 2017-12-01
Regulation (derived from): State-Quality-Inspection-Accreditation (2017) 228
Issuing agency(ies): General Administration of Customs

SN/T 4778-2017: Determination of streptomycin and dihydrostreptomycin in pollen 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 streptomycin and dihydro streptomycin in export pollen by liquid chromatography-mass spectrometry/mass spectrometry) People's Republic of China entry and exit inspection and quarantine industry standards Method for determination of streptomycin and dihydrostreptomycin in export pollen Liquid chromatography-mass spectrometry/mass spectrometry LC-MS/MSmethod Released on.2017-05-12 2017-12-01 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 does not assume responsibility for identifying these patents. This standard is proposed and managed by the National Certification and Accreditation Administration. This standard was drafted. Jiangsu Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China. The main drafters of this standard. Huang Juan, Liu Yan, Liu Wei, Li Jingjing, Jiang Shan, Chen Huilan, Yin Yao, Zhang Xiaoyan, Ding Tao. Method for determination of streptomycin and dihydrostreptomycin in export pollen Liquid chromatography-mass spectrometry/mass spectrometry

1 Scope

This standard specifies the method for the determination of streptomycin and dihydrostreptomycin in the pollen by liquid chromatography-mass spectrometry/mass spectrometry. This standard is applicable to streptomycin and dihydrostreptomycin in exporting pine pollen, corn pollen, tea pollen, sunflower powder, rape pollen and pollen. Determination and confirmation.

2 Normative documents

The following documents are indispensable for the application of this document. 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 streptomycin and dihydrostreptomycin in the sample are extracted by the extraction solution, and the protein in the sample is precipitated by chloroform, and the supernatant is passed through the C18 column. After the determination, it was determined by liquid chromatography-mass spectrometry/mass spectrometry. The external standard method is quantitative.

4 reagents and materials

Unless otherwise stated, only reagents identified as analytically pure were used in the analysis and water was used as the primary water specified in GB/T 6682. 4.1 Methanol. High performance liquid chromatography grade. 4.2 Phosphoric acid. 4.3 tert-butyl methyl ether. 4.4 Formic acid. HPLC grade. 4.5 n-hexane. 4.6 Trichloromethane. 4.7 Ammonium acetate. CH3CO2NH4, high performance liquid chromatography grade. 4.8 Sodium heptane sulfonate (C7H15SO3Na). 4.9 Sodium phosphate [Na3PO4·(H2O)12]. 4.10 Extraction solution. Accurately weigh 10.1 g of sodium heptane sulfonate (4.8), 4.1 g of sodium phosphate (4.9), dissolve in water and transfer to 1000 mL capacity. Add 5 mL of phosphoric acid (4.2) to the measuring flask and bring up to volume with water. 4.11 tert-butyl methyl ether-n-hexane solution (41, volume ratio). accurately measure 400 mL of tert-butyl methyl ether (4.3), add 100 mL Hexane (4.5), mixed evenly. 4.12 Formic acid solution (5 ‰, volume ratio). Accurately measure 5 mL of formic acid (4.4), add to 1000 mL volumetric flask, and dilute to volume with water until Scale. 4.13 0.02mol/L ammonium acetate solution. accurately weigh 1.54g ammonium acetate (4.7), dissolved in water and transferred to a 1000mL volumetric flask, Dilute to the mark with water. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of SN/T 4778-2017_English be delivered?

Answer: Upon your order, we will start to translate SN/T 4778-2017_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of SN/T 4778-2017_English with my colleagues?

Answer: Yes. The purchased PDF of SN/T 4778-2017_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.