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GB/T 21864-2008Standard test method for molecular weight averages and molecular weight distribution of polystyrene -- High performance size-exclusion chromatography (English PDF)

聚苯乙烯的平均分子量和分子量分布的检测标准方法高效体积排阻色谱法

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Issued by

Standardization Administration of China

Level / Type

National · Recommended

Issue date

May 12, 2008

Implementation date

September 1, 2008

Scope

GB/T 21864-2008 is the English-translated version of 聚苯乙烯的平均分子量和分子量分布的检测标准方法高效体积排阻色谱法.

GB/T 21864-2008 — 1.1 standard specifies the determination of soluble linear polystyrene average molecular weight (M) by high performance size exclusion chromatography (HPSEC) and points the method of molecular weight distribution.

This method is not an absolute method requires the use of a commercially available narrow molecular weight distribution polystyrene standard substance for calibration.

This standard applies to elution volume containing molecular weight components of the sample was measured (polystyrene standard molecular weight in the range of substances identified in the general in 2000g · mol-1 ~ 2000000g · mol-1).

1.2 HPSEC Unlike conventional size exclusion chromatography SEC (reference gel permeation chromatography GPC), Mita per plate is SEC 10 times (See ASTMD883 and ASTMD3016).

HPSEC system consists of a low volume liquid chromatography components, small column filled pores Particles (3µm ~ 20µm). HPLC instrumentation and automatic data processing system for data acquisition and processing.

1.3 standard uses SI units. 1.4 This standard does not give all the relevant security, if there are other security should be combined with use. Responsibility of the user of this standard to build Establish safety and health codes, regulations limit the application of the test during operation. Chapter 9 provides for specific prevention measures.

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Document preview — GB/T 21864-2008

National Standard of the People's Republic of China

ICS: 13.300
Classification: A 80

Issued by: Standardization Administration of China

What this standard covers1
Document data2
Standards quoted by this document3

What this standard covers

This standard specifies performance size exclusion chromatography (HPSEC) Determination of average molecular weight linear soluble polystyrene (Mw) and molecular weight distribution methods. This method is not an absolute method, requires the use of narrow molecular weight distribution polystyrene standards commercially available materials for calibration. This standard applies to the elution volume containing molecular weight components, polystyrene standard material in determining the extent of sample measurement (molecular weight generally 2000g. mol-1 ~ 2000000g. mo1-1).

Document data

International classification (ICS): 13.300.

Chinese classification (CCS): A80.

Estimated length of the Chinese original: 22,266 words.

Adopted international standard: ASTM D5296-2005, IDT.

Standards quoted by this document

ASTM D691; ASTM D883; ASTM D2857; ASTM D3016; ASTM E685

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

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