GB/T 27810-2011
Binders for paints and varnishes.Gel permeation chromatography(GPC).Tetrahydrofuran(THF) as eluent (English Version)
- Standard No.
- GB/T 27810-2011
- Language
- Chinese, Available in English version
- Release Date
- 2011
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 27810-2011
- Scope
- CAUTION—This standard may involve hazardous substances, procedures, and equipment. This standard does not intend to address all safety issues related to its use (if any), so it is the responsibility of the user of this standard to establish appropriate safety and health measures and ensure compliance with any national regulations. See Chapter 6 for specific hazard statements. This standard specifies the method for determining the molecular weight distribution, number average molecular weight Mn and weight average molecular weight Mw of polymers dissolved in THF (tetrahydrofuran) by gel permeation chromatography (GPC). Even though good reproducibility can be obtained with this method, the method cannot be used for certain polymers where special interactions occur, such as adsorption between the sample/eluent/column system. This method is not an absolute determination method, it needs to be calibrated with a commercially available unbranched polystyrene standard substance, and the molecular weight of this standard substance has been measured by an absolute method. Therefore, except for polystyrene, the determination results of polymer samples should only be used for comparison between groups of samples of the same type. The conditions specified in this standard are not applicable to the analysis of polymer samples with Mw value greater than 106 by GPC (see Appendix C). There are no correction methods in this standard, such as eliminating peak broadening. If you want to get the absolute molecular weight value, you need to use absolute method to measure, such as Mn by membrane permeation method or Mw by light scattering method.
GB/T 27810-2011 Referenced Document
- ISO 1513 Paints and varnishes - Examination and preparation of test samples
- ISO 15528 Paints, varnishes and raw materials for paints and varnishes — Sampling*， 2020-05-13 Update
- ISO 5725-1 Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definitions*， 2023-07-01 Update
GB/T 27810-2011 history
- 2011 GB/T 27810-2011 Binders for paints and varnishes.Gel permeation chromatography(GPC).Tetrahydrofuran(THF) as eluent
