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

SN/T 3344-2012 English PDF

Q: How long will the true-PDF of English version of SN/T 3344-2012 be delivered?

Upon your order, we will start to translate SN/T 3344-2012_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.

Q: Can I share the purchased PDF of SN/T 3344-2012_English with my colleagues?

Yes. The purchased PDF of SN/T 3344-2012_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$209.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
SN/T 3344-2012: Determination of free glycerin in crude glycerin. Gas chromatography
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 3344-2012	209	Add to Cart	3 days	Determination of free glycerin in crude glycerin. Gas chromatography	Valid

Similar standards

SN/T 5268

Basic data

Standard ID: SN/T 3344-2012 (SN/T3344-2012)
Description (Translated English): Determination of free glycerin in crude glycerin. Gas chromatography
Sector / Industry: Commodity Inspection Standard (Recommended)
Word Count Estimation: 8,890
Regulation (derived from): National Quality Inspection (2012) 777; industry standard filing Notice 2013 No. 4 (No. 160 overall)
Issuing agency(ies): General Administration of Customs
Summary: This standard specifies the crude glycerol of free glycerol content Gas chromatographic method. This standard applies to the mass fraction of less than 95% bio-diesel made crude glycerin byproduct, industrial saponification glycerine and synthetic glyceri

SN/T 3344-2012: Determination of free glycerin in crude glycerin. Gas chromatography

---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 free glycerin in crude glycerin.Gas chromatography People's Republic of China Entry-Exit Inspection and Quarantine Standards Crude glycerol free glycerol determination Gas chromatography Issued on. 2012-12-12 2013-07-01 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard was drafted. People's Republic of China Jiangsu Entry-Exit Inspection and Quarantine Bureau. The main drafters of this standard. Ding Hua, Li Xidong, Zhouqiu Hong, lord Hing. Crude glycerol free glycerol determination Gas chromatography

1 Scope

This standard specifies the gas chromatographic method crude glycerol free glycerol content. This standard applies to the mass fraction of less than 95% of the by-product bio-diesel made crude glycerin, industrial saponification glycerol synthetic glycerine.

2 Method summary

After the sample was added acetic anhydride was heated to produce triacetin after derivatization reaction was measured by gas chromatography internal standard method.

3 Reagents

Unless otherwise indicated in the analysis using only recognized as analytical reagents. Sample Glycerin 3.1 (C3H8O3). content of more than 99%. Acetic anhydride 3.2 (C4H6O3). content greater than 95%. 3.3 Internal standard. ethyl benzoate (C9H10O2), content greater than 99%.

4 Instrument

4.1 Gas chromatograph. equipped with a flame ionization detector (FID). 4.2 micro-injector. 10μL. 4.3 Pipette. 1mL, 25mL. 4.4 dropper. 25mL. 4.5 stoppered conical flask. 125mL. 4.6 Analysis of balance. a sense of the amount of 0.1mg.

5 Sample

Crude glycerin samples were thoroughly mixed, placed in a dropper bottle and set aside. Step 6 Analysis 6.1 Preparation of the sample By Difference Method Weigh 0.4g ~ 0.5g sample of the crude glycerol in stoppered Erlenmeyer flask, accurate to 0.2mg. 6.2 Derivative In a sample containing glycerin stoppered Erlenmeyer flask, 25mL acetic anhydride (3.2), placed in an oven at 120 ℃ reaction 2h. Remove to cooling ......

Image

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of SN/T 3344-2012_English be delivered?

Answer: Upon your order, we will start to translate SN/T 3344-2012_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 3344-2012_English with my colleagues?

Answer: Yes. The purchased PDF of SN/T 3344-2012_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.