GB/T 21864-2008
Standard test method for molecular weight averages and molecular weight distribution of polystyrene.High performance size-exclusion chromatography (English Version)
- Standard No.
- GB/T 21864-2008
- Language
- Chinese, Available in English version
- Release Date
- 2008
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 21864-2008
- Scope
- 1.1 This standard specifies the method for determining the average molecular weight (Mw) and molecular weight distribution of linear soluble polystyrene by high performance size exclusion chromatography (HPSEC). This method is not absolute and requires the use of commercially available narrow molecular weight distribution polystyrene standards for calibration. This standard is applicable to the determination of the eluting volume of the molecular weight components within the range determined by the polystyrene standard substance (the molecular weight is generally 2 000 g·mol-1～2 000 000 g·molmark-1). 1.2 HPSEC is different from traditional size exclusion chromatography SEC (refer to gel permeation chromatography GPC), and the number of plates per meter is 10 times that of SEC (see ASTM D 883 and ASTM D 3016). The HPSEC system consists of low-volume liquid chromatography components, and the chromatographic column is filled with small microporous particles (3 μm to 20 μm). High-performance liquid chromatography instrumentation and an automated data processing system were used for data acquisition and processing. 1.3 This standard uses SI units. 1.4 This standard does not give all the relevant safety, if there are other safety should also be used in combination. It is the responsibility of the user of this standard to establish safety and health practices and to test specified application limits during operation. Chapter 9 specifies specific precautions.
GB/T 21864-2008 Referenced Document
- ASTM D2857 Standard Practice for Dilute Solution Viscosity of Polymers
- ASTM D3016 Standard Practice for Use of Liquid Exclusion Chromatography Terms and Relationships*， 2018-11-01 Update
- ASTM D691
- ASTM D883 Standard Terminology Relating to Plastics*， 2024-02-01 Update
- ASTM E685 Standard Practice for Testing Fixed-Wavelength Photometric Detectors Used in Liquid Chromatography*， 2021-04-01 Update
GB/T 21864-2008 history
- 2008 GB/T 21864-2008 Standard test method for molecular weight averages and molecular weight distribution of polystyrene.High performance size-exclusion chromatography
