Simultaneous determination of barbiturates in human biological fluids by direct immersion solid-phase microextraction and gas chromatography-mass spectrometry

Department of Legal Medicine, Showa University, Shinagawa, Tōkyō, Japan
Journal of Chromatography B (Impact Factor: 2.73). 07/2004; 806(1):65-73. DOI: 10.1016/j.jchromb.2004.03.016
Source: PubMed


Simultaneous determination of seven barbiturates in human whole blood and urine by combining direct immersion solid-phase microextraction (DI-SPME) with gas chromatography-mass spectrometry (GC-MS) is presented. The main parameters affecting the DI-SPME process, such as SPME fibers, salt additives, pHs, extraction temperatures and immersion times were optimized for simultaneous determination of the drugs. The extraction efficiencies were 0.0180-0.988 and 0.0156-2.76% for whole blood and urine, respectively. The regression equations of the drugs showed excellent linearity for both samples; the correlation coefficients (r(2)) were 0.994-0.999. The detection limits for whole blood were 0.05-1 microg x ml(-1), and those for urine 0.01-0.6 microg x ml(-1). Actual quantitation could be made for pentobarbital in whole blood and urine obtained from volunteers, who had been orally administered a therapeutic dose of the drug. The DI-SPME/GC-MS procedure for barbiturates established in this study is simple and sensitive enough to be adopted in the fields of clinical and forensic toxicology.

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    • "al . , 2009 Hair HS - SPME PDMS ( 100 ) GC - MS Liu et al . , 2001 Nishida et al . , 2006 Saliva HS - SPME DI - SPME PDMS ( 30 ) GC - MS Fucci et al . , 2003 Barbiturates Whole blood DI - SPME PDMS ( 100 ) PDMS / DVB ( 65 ) GC - MS Iwai et al . , 2004 Urine DI - SPME PDMS ( 100 ) PDMS / DVB ( 65 ) PA ( 85 ) GC - MS Iwai et al . , 2004"
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