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Design and evaluation of a sandwich phase separator for on-line liquid/liquid extraction

โœ Scribed by C. De Ruiter; J.H. Wolf; U.A. Th. Brinkman; R.W. Frei

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
611 KB
Volume
192
Category
Article
ISSN
0003-2670

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โœฆ Synopsis

Sandwich phase separators with various groove dimensions were constructed and tested as part of a post-column extraction detector for liquid chromatography and for a flow-injection system. The construction materials are stainless steel and PTFE, no membranes are used. The groove volumes vary between 8 and 43 ~1; the dimensions of the groove are not critical. Several aqueous (acetonitrile/water and methanol/water mixtures) and organic (1,2-dichloroethane and n-heptane) phases were successfully separated by gravity as well as by wetting. Measurement of statistical second moments showed the total dispersion of the extraction system to be 2.5-4 s at the optimum separation efficiency (organic flow through detector/total organic flow) of 0.3-0.4.

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