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GB/T 27843-2011 English PDF

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US$279.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 27843-2011: Chemicals -- Determination of the low molecular weight content of a polymer using -- Gel permeation chromatography (GPC)
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 27843-2011	279	Add to Cart	3 days	Chemicals -- Determination of the low molecular weight content of a polymer using -- Gel permeation chromatography (GPC)	Valid

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Basic data

Standard ID: GB/T 27843-2011 (GB/T27843-2011)
Description (Translated English): Chemicals -- Determination of the low molecular weight content of a polymer using -- Gel permeation chromatography (GPC)
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A80
Classification of International Standard: 13.300
Word Count Estimation: 12,133
Date of Issue: 2011-12-30
Date of Implementation: 2012-08-01
Quoted Standard: DIN 55672-1-2007
Regulation (derived from): Announcement of Newly Approved National Standards No. 23 of 2011
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the use of gel permeation chromatography (gel permeation chromatography, GPC) a low molecular weight component content of the polymer was measured approach. This standard applies to the determination of low molecular weight polymer content of the component. Diverse nature of the polymer material, the low molecular weight substances contained in, a number of polymers due to a special structure suitable for use of complex gel permeation chromatography to determine the content of low molecular weight, can be measured using other methods, as measured according to the polymeric material details, select the appropriate measurement instrument.

GB/T 27843-2011: Chemicals -- Determination of the low molecular weight content of a polymer using -- Gel permeation chromatography (GPC)

---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.
Chemicals. Determination of the low molecular weight content of a polymer using. Gel permeation chromatography (GPC) ICS 13.300 A80 National Standards of People's Republic of China Determination of low molecular weight polymer component content of chemicals Gel permeation chromatography (GPC) polymerusingGelpermeationchromatography (GPC) Issued on. 2011-12-30 2012-08-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. The technical content of this standard and the Organization for Economic Cooperation and Development (OECD) chemical testing methods No.119 (1996 Nian) "gel permeation chromatography Spectroscopy (GPC) determination of low molecular weight component polymer "(in English) the same. The editorial changes made the following standard. --- Increasing the scope section; --- Rearrange the page; --- Of the original re-numbered. This standard is managed by the National Standardization Technical Committee chemicals dangerous (SAC/TC251) and focal points. This standard was drafted. Chinese Academy of Inspection and Quarantine, China Chemical Technology Development Center of Jiangsu Coal Chemical Engineering Research Institute Limited, the Chemical Institute of Standardization. The main drafters of this standard. Song Naining, Falls Apart, Wang Xiaobing, Yang Ting, Guo Xinyu.

Introduction

This method is included in the original proposal of the European Commission (EC) working paper on the characteristics of the polymer method. The proposal in 1993 April was submitted to the Committee of Experts on the OECD held in Japan, and is recommended as a basis for the development of OECD test method. In 1994, The proposal by the Secretariat formatting OECD test methods to be distributed to Member States to EC text. Then in 1994, OECD/EC Joint Meeting of Experts on the proposal test methods were discussed and proposed modifications. The modified proposal no longer be distributed to the Member States For further discussion. After two rounds of discussions, the draft test method in its current form is completed. The method is based on DIN55672-1.2007. Specific measurement methods and data processing methods in DIN standards are introduced. In real Intertemporal changes in measurement conditions shall be adjusted accordingly. If there are other complete reference method may be used. This method describes the use of Polystyrene samples of known polydispersity do a calibration curve. This method can do the corresponding modification to suit the particular polymer, such as a water-soluble polymer And long-chain branched polymers. Determination of low molecular weight polymer component content of chemicals Gel permeation chromatography (GPC)

1 Scope

This standard specifies the determination of low molecular weight polymers using gel permeation chromatography (gelpermeationchromatography, GPC) The method of component content. This standard applies to the determination of low molecular weight components of the polymer. Since the diverse nature of the polymer material, also contained low molecular weight material Different, because some polymers having a particularly complex structure is not suitable to determine the content of the low molecular weight using gel chromatography, may be employed other parties Determination, when measured in accordance with the details of the polymeric material, select the appropriate measurement instrument.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. DIN55672-1.2007 gel permeation chromatography (GPC) - Part 1. as an elution solvent (Gelper- with tetrahydrofuran (THF) meationchromatography (GPC) -Part 1. Tetrahydrofuran (THF) aselutionsolvent).

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Polymer has a number average molecular weight (Mn) and weight average molecular weight (Mw) thenumber-averagemolecularweightMnandthe weight-averagemolecularweightMw Mn = i = 1 Hi i = 1 Hi/Mi Mw = i = 1 Hi × Mi i = 1 Hi Where. Hi --- elution volume Vi baseline to the height detection signal; Mi --- elution volume Vi molecular weight polymers; n --- The number of measured data obtained. 3.2 Molecular weight distribution width thebreadthofthemolecularweightdistribution Measure the degree of dispersion of the molecular weight of the polymer, the weight average molecular weight and number average molecular weight ratio Mw/Mn expressed. 3.3 Low molecular weight lowmolecularweight Molecular weight less than 1000Da (1Da = 1u = 1.66054 × 10-27kg).

4 reference substance

The average molecular weight of the polymer measured by GPC is a relative method, calibration curve correction required. Usually known number average molecular weight ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 27843-2011_English be delivered?

Answer: Upon your order, we will start to translate GB/T 27843-2011_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 GB/T 27843-2011_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 27843-2011_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.