Application of microwave-assisted micellar extraction combined with solid-phase microextraction and high-performance liquid chromatography with UV detection for the determination of organochlorine pesticides in different mud samples |
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Authors: | Daura Vega Zoraida Sosa |
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Affiliation: | Faculty of Marine Sciences, Department of Chemistry , University of Las Palmas de Gran Canaria , 35017 Las Palmas de Gran Canaria, Spain |
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Abstract: | Abstract A sequential injection analysis method for the simultaneous spectrophotometric determination of phosphate and silicate has been developed. The method is based on the different reaction rates of the heteropolymolybdate formation reactions. Concentrations within the range 0.026—0.485 mmol P l?1 and 0.125—2.848 mmol Si l?1 have been determined at a frequency of 30 samples per hour. An R.S.D. of 2.1% was obtained for 0.162 mmol P l?1 and of 1.1% for 1.424 mmol Si l?1. The method was found to be suitable for the determination of phosphate and silicate in wastewater. |
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Keywords: | Microwave Micellar solution Solid-phase microextraction Organochlorine pesticides Mud samples |
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