A New Method for Monitoring the Contamination of Glycerol with Diethylene Glycol

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 contac...

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Bibliographic Details
Published in:Journal of pharmacy and pharmacology 1999-02, Vol.51 (2), p.233-236
Main Authors: GOMES, M. T. S. R., VERÍSSIMO, M. I. S., OLIVEIRA, J. A. B. P.
Format: Article
Language:English
Subjects:
Analysis
Biological and medical sciences
Biosensing Techniques - instrumentation
Biosensing Techniques - methods
Chemistry, Pharmaceutical
Ethylene Glycols - analysis
General pharmacology
Glycerol - analysis
Glycerol - isolation & purification
Medical sciences
Pharmacology. Drug treatments
Quartz
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Summary: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.
ISSN:0022-3573
2042-7158
DOI:10.1211/0022357991772196