Journal
TALANTA
Volume 68, Issue 2, Pages 416-421Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2005.09.002
Keywords
sequential injection analysis; lab-at-valve; on-line liquid-liquid micro-extraction
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Sequential injection analysis (SIA) with lab-at-valve (LAV) approach for on-line liquid-liquid micro-extraction has been exploited. Sample, reagent and organic solvent were sequentially aspirated into a coil attached to a central port of a conventional multiposition selection valve, where the extraction process was performed. The aqueous and organic phases were separated in a conical separating chamber LAV unit attached at one port of the valve. The organic phase containing extracted product was then monitored spectrophotometrically. The system offers a novel alternative on-line automated extraction in a micro-scale and has been successfully demonstrated for the assays of diphenhydramine hydrochloride (DPHH) in pharmaceutical preparations and anionic surfactant in water samples. (c) 2005 Published by Elsevier B.V.
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