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SN/T 2440-2010 English PDF

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US$419.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
SN/T 2440-2010: Determination of caffeine in royal jelly for import and export. LC-MS/MS
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 2440-2010	419	Add to Cart	3 days	Determination of caffeine in royal jelly for import and export. LC-MS/MS	Valid

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Basic data

Standard ID: SN/T 2440-2010 (SN/T2440-2010)
Description (Translated English): Determination of caffeine in royal jelly for import and export. LC-MS/MS
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: X04
Classification of International Standard: 67.050
Word Count Estimation: 16,119
Date of Issue: 2010-01-10
Date of Implementation: 2010-07-16
Regulation (derived from): National Quality Inspection [2010] No. 13
Issuing agency(ies): General Administration of Customs
Summary: This standard specifies the caffeine content in royal jelly liquid chromatography tandem mass spectrometry method. This method is applicable export royal jelly caffeine content of the sample preparation and measurement methods.

SN/T 2440-2010: Determination of caffeine in royal jelly for import and export. LC-MS/MS

---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 caffeine in royal jelly for import and export.LC-MS/MS Exit inspection and quarantine industry standard book People's Republic of China Determination of caffeine content in the import and export of royal jelly Liquid chromatography - tandem mass spectrometry LC-MS/MS Issued on. 2010-01-10 2010-07-16 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released

Foreword

The Standard Appendix A, Appendix B are informative appendices. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard was drafted. People's Republic of China Hunan Entry-Exit Inspection and Quarantine Hubei People's Republic of China Bureau, People's Republic of China Zhejiang Exit Inspection and Quarantine. The main drafters of this standard. Mei-ling, Wang Peng, Wei Ying, Chen Xiaomei, Dai Hua. This standard is the first release of the entry-exit inspection and quarantine industry standards. Determination of caffeine content in the import and export of royal jelly Liquid chromatography - tandem mass spectrometry

1 Scope

This method specifies the caffeine content in royal jelly liquid chromatography - tandem mass spectrometry determination. This method is suitable for sample preparation and measurement methods Determination of caffeine content in the import and export of royal jelly.

2 Method summary

Sample caffeine extracted with water, after precipitation of proteins by C18 SPE column purification, liquid chromatography - mass spectrometry/mass spectrometry, External standard.

3 Reagents and materials

Unless otherwise specified, all reagents were of analytical grade, double distilled water. 3.1 acetonitrile. HPLC fractions. 3.2 Methanol. HPLC fractions. 3.3 formic acid. pure class distinctions. 3.4 lead acetate. 3.5 potassium oxalate. 3.6 dibasic sodium phosphate. 3.7 20% lead acetate solution. take 20g lead acetate dissolved in water and dilute to 100mL. 3.8 Potassium Oxalate - disodium hydrogenphosphate solution. potassium oxalate take 3g, disodium hydrogen phosphate, 7g, 100mL of water was added to dissolve. 3.9 20% aqueous methanol. Take 20mL of methanol to volume with water to 100mL. 3.10 60% aqueous methanol. Take 60mL of methanol to volume with water to 100mL. 3.11 0.1% formic acid solution. accurately take 1mL acid to volume with water to 1000mL. 3.12 caffeine (caffeine, C8H10N4O2, CAS No. 5743-12-4, molecular weight 194.19). purity greater than or equal 99.8%. 3.13 standard stock solution. accurately weighed amount of caffeine standards, standard solutions dissolved in water dubbed 100μg/mL of, 4 ℃ dark protection Deposit, this standard solution is stable within six months. 3.14 standard solution. When you use with 60% aqueous methanol diluted into standard stock solution containing caffeine 5μg/L, 10μg/L, 50μg/L, 100μg/L, 500μg/L of standard working solution. 3.15 SPE. C18 solid phase extraction column (250mg, 3mL) or equivalent person. Before use 5mL methanol and 5mL water pre-wash. 3.16 0.45μm membrane, organic.

4 instruments and equipment

4.1 High performance liquid chromatography - tandem quadrupole mass spectrometer. Distribution spray (ESI) ion source. 4.2 Centrifuge. 4000r/min. 4.3 Vortex is.200r/min ~ 24000r/min adjustable. 4.4 ultrasonic cleaner. 4.5 balance, a sense of the amount of 0.001g, 0.0001g. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of SN/T 2440-2010_English be delivered?

Answer: Upon your order, we will start to translate SN/T 2440-2010_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 2440-2010_English with my colleagues?

Answer: Yes. The purchased PDF of SN/T 2440-2010_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.