The technique of liquid chromatography with electrochemical detection has been applied to the determination of alkylphenols in refinery effluents. Specific problems addressed were the trace enrichment of low-level phenols and the simultaneous detection of meta- and para-cresols which are difficult to separate chromatographically. The former problem was solved using C18 Sep Pak(TM) cartridges followed by controlled evaporation of the eluant. Separate responses for the meta and para cresols were achieved by using two different potentials. The fully developed method is sensitive and selective in the determination of alkylphenols in environmental waters.
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Cardwell et al. (1986) studied this question.
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