Determination of four acids in the air of workplace by gas chromatography / 中华劳动卫生职业病杂志

ABSTRACT

<p><b>OBJECTIVE</b>Four kinds of acids (acetic acid, propionic acid, acrylic acid and methylacrylic acid) in the air in a workplace were quantitatively determined by gas chromatography synchronously.</p><p><b>METHODS</b>Four acids in the air were adsorbed by silica gel tube sampling and solvent desorption using acetone, then analyzed by GC with FFAP capillary column.</p><p><b>RESULTS</b>To acetic acid, propionic acid, acrylic acid and methylacrylic acid, the linear regression equations were respectively y = -4.3+1.46x (r = 0.999), y = 0.4+2.37x (r = 0.999), y = 10.4+1.73x (r = 0.999) and y = -2.3+3.21x (r = 0.999). The detection limits were respectively 3.4 microg/mL, 2.1 microg/mL, 2.9 microg/mL and 1.6 microg/mL. The average desorption efficiencies were respectively 92.2%-92.8%, 94.1%-97.4%, 94.8%-95.4% and 94.1%-98.3%. The relative standard deviations were 1.1%-4.0%, 1.2%-7.8%, 0.9%-4.0% and 1.6%-4.8%.</p><p><b>CONCLUSION</b>The method is suitable to determine four kinds of acids in the air in a workplace.</p>