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SN/T 2492-2010 English PDF

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US$159.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
SN/T 2492-2010: Determination of molecular weight of liquefied petroleum gas. Gas chromatography
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 2492-2010	159	Add to Cart	3 days	Determination of molecular weight of liquefied petroleum gas. Gas chromatography	Valid

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Basic data

Standard ID: SN/T 2492-2010 (SN/T2492-2010)
Description (Translated English): Determination of molecular weight of liquefied petroleum gas. Gas chromatography
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: E30
Classification of International Standard: 75.080
Word Count Estimation: 6,620
Date of Issue: 2010-03-02
Date of Implementation: 2010-09-16
Quoted Standard: GB/T 9722
Regulation (derived from): National Quality Inspection (2010) 98; industry standard filing Notice 2010 No. 5 (No. 125 overall)
Issuing agency(ies): General Administration of Customs
Summary: This standard specifies the average molecular weight of liquefied petroleum gas chromatographic method. This standard applies to the following liquefied petroleum hydrocarbons C5 average molecular weight determination.

SN/T 2492-2010: Determination of molecular weight of liquefied petroleum gas. 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 molecular weight of liquefied petroleum gas.Gas chromatography Exit inspection and quarantine industry standard book People's Republic of China LPG molecular weight was measured by gas chromatography Issued on. 2010-03-02 2010-09-16 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released

Foreword

Appendix A of this standard is an informative annex. 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, People's Republic of China Zhejiang Entry-Exit Inspection and Quarantine Bureau, People's Republic of China Guangdong Entry Inspection and Quarantine Bureau. The main drafters of this standard. Wang Hongwei, Wang Hua, Hou Jin, Zheng Jianguo, Zhang Xiao radon, Zhang Aiping, Wang Yun, Wang Aiguo. This standard is the first release of the entry-exit inspection and quarantine industry standards. LPG molecular weight was measured by gas chromatography

1 Scope

This standard specifies the gas chromatographic determination of the average molecular weight of liquefied petroleum gas. This standard applies to the determination of LPG C5 or less an average molecular weight hydrocarbons.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 9722 General chemical reagent gas chromatography

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 And an average molecular weight of the product mixture of the components is equal to that occupied molecular weight substances mole fraction.

4 Method summary

By gas chromatograph with a flame detector, the samples of the components are separated by columns, with area normalization method to calculate the components The mass fraction, based on the mass fraction of each component and the corresponding molecular weight, calculated from the average molecular weight of liquefied petroleum gas.

5 Reagents and materials

5.1 Standard mixture. Group into methane, ethane, ethylene, propane, propylene, isobutane, n-butane, acetylene, iso-pentane, n-pentane. 5.2 polyethylene gas sample bags or sealed plastic bag.

6 instruments and equipment

Gas chromatograph. with a flame ionization detector and a six-way valve, its performance parameters in line with the provisions of GB/T 9722 requirements.

7 sample preparation

The gas sample bag (or plastic bag sealed polyethylene) vacuum, charge into the amount of liquefied sample, the sample fully gasified and set aside. Analysis Step 8 8.1 Gas chromatographic conditions 8.1.1 Column. Alumina/KCl50m × 0.53mm (. I.d) or equivalent person. Column flow. 3mL/min; Column temperature. initial temperature of 50 ℃ Holding 5min, with a heating rate of 10 ℃/min heating to 150 ℃, maintained 1min. 8.1.2 Inlet. temperature 180 ℃, split ratio 50.1. 8.1.3 Detector. Hydrogen flame ionization detector (FID), a temperature of 220 ℃. 8.1.4 Sampling methods. six-way valve gas autosampler injection volume of 0.5mL. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of SN/T 2492-2010_English be delivered?

Answer: Upon your order, we will start to translate SN/T 2492-2010_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 2492-2010_English with my colleagues?

Answer: Yes. The purchased PDF of SN/T 2492-2010_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.