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Utilization of polyethylene glycol for the separation of chlorophenols by capillary isotachophoresis

✍ Scribed by Petr Praus; Václav Dombek

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
414 KB
Volume
283
Category
Article
ISSN
0003-2670

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✦ Synopsis

AbStlWt

The separation of some chlorophenols (CPs) by capillary isotachophoresis using polyethylene glycol (PEG) as a polar additive dissolved in the leading electrolyte was studied. The distribution process of CPs between the PEG polymer network, considered to be the pseudo-stationary phase not bonded on the capillary walls, and the aqueous mobile phase is described. The optimum concentration of PEG for the complete separation of pentachlorophenol, 2,4,5trichlorophenol, 2,4,6-trichlorophenol and 2,4_dichlorophenol was found to be 4% (w/v).

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Simple steam distillation, as a preconcentration step for the isotachophoretic determination of chlorophenols in river and industrial waste waters, was studied. The overall recoveries of the complete analytical method for pentachlorophenol, 2,4,5trichlorophenol, 2,4-dichlorophenol and 2-chlorophenol