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- W2109780143 abstract "Abstract A new, simple and rapid procedure for the determination of dimethoate in urine and blood samples was developed using direct immersion solid‐phase microextraction and gas chromatography/mass spectrometry. This technique required only 0.1 mL of sample, and ethion was used as internal standard. Two types of coated fibre were compared (100 µm polydimethylsiloxane, and 65 µm Carbowax™/divinylbenzene). Other parameters, such as extraction temperature, adsorption and desorption time, salt addition, agitation and pH, were optimized to enhance the sensitivity of the method. Limits of detection (LODs) and quantitation (LOQs) were 50 and 100 ng/mL for urine and 200 and 500 ng/mL for blood, respectively. The method was found to be linear between the LOQ and 40 µg/mL for urine, and between the LOQ and 50 µg/mL for blood, with correlation coefficients ranging from 0.9923–0.9996. Precision (intra‐ and interday) and accuracy were in conformity with the criteria normally accepted in bioanalytical method validation. The mean absolute recoveries of dimethoate were 1.24 and 0.50% for urine and blood, respectively. Because of its simplicity and the fact that small volumes of sample are used, the described method can be successfully used in the diagnosis of poisoning by this pesticide, namely in those situations where the sample volume is limited, as frequently occurs in forensic toxicology. Copyright © 2006 John Wiley & Sons, Ltd." @default.
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- W2109780143 date "2006-02-08" @default.
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- W2109780143 title "Solid-phase microextraction for gas chromatographic/mass spectrometric analysis of dimethoate in human biological samples" @default.
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- W2109780143 doi "https://doi.org/10.1002/rcm.2388" @default.
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