GC Determination of Acetone, Butanone, Methyl Isobutyl Ketone and Cyclohexanone in Air of Workplace

Contents of acetone, butanone, methyl isobutyl ketone and cyclohexanone in air of workplace were determined by gas chromatography. Air sample containing the 4 ketones was collected by adsorption with activated carbon tube, and desorbed with CS2. HP-FFAP column was used for separation, and FID was used for determination. Values of detection limit (2S/N) of acetone, butanone, methyl isobutyl ketone, cyclohexanone found were 9, 5, 1 and 0.4 mg·L-1 respectively. Values of recovery and RSD′s (n=8) found were in the ranges of 87.8%-105% and 3.6%-5.2% respectively. Values of rate of desorption efficiency were in the range of 88.6%-98.8%.