Affiliation:
1. Department of Chemistry, University of Aveiro, 3810 Aveiro, Portugal
Abstract
Abstract
A quartz crystal microbalance has been used to check the purity of glycerol.
The experimental procedure involves no derivatization or other preliminary step except determination of water content. The protocol consists of the direct reading of the frequency of a quartz crystal with one face in contact with an aqueous solution of the glycerol to be tested.
The method is inexpensive, simple, rapid, and highly sensitive; diethylene glycol contamination at the 3.61% level could be detected.
Publisher
Oxford University Press (OUP)
Subject
Pharmaceutical Science,Pharmacology
Reference4 articles.
1. Inactive ≠ inert, progress in pharmaceutical excipients;Blecher;Pharm. Technol.,1998
2. Quantification of glycerol contamination by diethylene glycol;Davies;Int. Lab.,1998
3. Frequency shifts of piezoelectric quartz crystals immersed in organic liquids;Nomura;Anal. Chim. Acta.,1982
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