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  • Title: [Determination of four acids in the air of workplace by gas chromatography].
    Author: Li XJ.
    Journal: Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi; 2011 Jun; 29(6):454-6. PubMed ID: 22096864.
    Abstract:
    OBJECTIVE: 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. METHODS: 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. RESULTS: 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%. CONCLUSION: The method is suitable to determine four kinds of acids in the air in a workplace.
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