Optimization of solid-phase microextraction conditions for gas chromatographic determination of ethanol and other volatile compounds in blood.
A procedure for the determination of acetaldehyde, acetone, methanol, ethanol, 1-propanol and 2-propanol in blood was developed. Separation of analytes was carried out on DB-wax capillary column (l = 30 m, I.D. = 0.32 mm, dF = 0.5 microm) at 40 degrees C, hydrogen was used as a carrier gas (at 30 kPa) and FID as a detector. Quantification was performed with the use of 2-butanol as an internal standard. Headspace solid-phase microextraction was applied as the sample preparation technique. The usefulness of most commercially available fiber coatings was checked and 65 microm Carbowax/DVB proved most effective. Microextraction was carried out from the headspace at 60 degrees C for 10 min. The sample was stirred at 750 rpm. In order to improve the extraction efficiency of analytes, salting-out agents were also applied. Potassium carbonate turned out to be the most efficient. A 1.0-g amount of this salt and 0.1 ml of I.S. were added to 0.5 ml of sample. Validation of the worked-out method was performed. For each analyte, the limits of detection and quantification, linearity, working range, accuracy and precision were determined or tested.
Zuba
Dariusz
D
Institute of Forensic Research, Westerplatte 9, PL 31-033, Krakow, Poland.
Parczewski
Andrzej
A
Reichenbächer
Manfred
M
D000079:Acetaldehyde / Q000097:blood; D000096:Acetone / Q000097:blood; D000438:Alcohols / Q000097:blood; D002849:Chromatography, Gas / Q000379:methods*; D000431:Ethanol / Q000097:blood*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014835:Volatilization
D000438:Alcohols; D000096:Acetone; D000431:Ethanol; D000079:Acetaldehyde