Method of determining the molecular weight distribution of carboxymethylcellulose or a salt thereof
US5521100A · kind A · utility
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Key dates
| Filing date | Aug 31, 1994 |
| Grant date | May 28, 1996 |
| Priority date | — |
| Expiry date | Aug 31, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/201666
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The molecular weight distribution of carboxymethylcellulose or its salt is determined by gel permeation chromatography using a metal-amine complex and/or a metal-alkali complex as the mobile phase solvent. The column geometry (inside diameter/length) and flow rate for this determination are 1:40-100 and 0.2-0.5 ml/min., respectively. According to this method, the GPC determination of molecular weight distribution can be performed under the same conditions for both starting pulp and CMC.
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