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Multi-stage chromatographic procedure for the isolation of a single oligomeric species (vinyl chloride tetramer) from poly(vinyl chloride) resin used for food packaging applications

Authors
Journal
Journal of Chromatography A
0021-9673
Publisher
Elsevier
Publication Date
Volume
320
Issue
2
Identifiers
DOI: 10.1016/s0021-9673(01)90514-x

Abstract

Abstract A multi-stage chromatographic procedure is described whereby low-molecular-weight material initially obtained by soxhlet diethyl ether extraction from food grade poly(vinyl chloride) (PVC) resin, is fractionated to yield firstly a mixture of vinyl chloride oligomers and then a single species free from other impurities. A number of column chromatographic procedures were evaluated, and a combination of high-performance size exclusion columns using initially tetrahydrofuran solvent followed by toluene solvent were shown to produce the most effective separation. The isolation and purification of a vinyl chloride tetramer was monitored by capillary column gas chromatography with specific chlorine detection (Hall electrolytic conductivity detector) and the identification confirmed by mass spectrometry. Using this newly developed procedure 0.5 mg of vinyl chloride tetramer was isolated from a PVC base resin.

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