摘要
目的建立工作场所空气中乙酸、丙酸、丙烯酸及甲基丙烯酸4种羧酸同时测定的毛细管柱气相色谱方法。方法硅胶管吸附空气中乙酸、丙酸、丙烯酸及甲基丙烯酸，用丙酮解吸后毛细管柱气相色谱（FID）测定。结果乙酸、丙酸、丙烯酸及甲基丙烯酸浓度分别在3．4-500．0、2．1—500．0、2．9—500．0及1．6-500．0μg／ml范围内线性关系良好；线性方程分别为：y=-4．3＋1．46x（r=0．999）；y=0．4＋2．37x（r=0．999）；y=10．4＋1．73x（r=0．999）；y=-2．3＋3．21x（r=0．999）；检出限分另0为3．4、2．1、2．9及1．6μg／ml。若采集15L空气样品，最低检出浓度分别为0．2、0．1、0．2及0．1mg／m^3；平均解吸效率分别为92．2％-92．8％、94．1％-97．4％、94．8％-95．4％及94．1％-98．3％；相对标准偏差分别为1．1％-4．0％、1．2％-7．8％、0．9％-4．0％及1．6％-4．8％。结论本方法适用于工作场所空气中4种羧酸浓度的同时测定。
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 μg/mL, 2.1 μg/mL, 2.9 μg/mL and 1.6 μg/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.
出处
《中华劳动卫生职业病杂志》
CAS
CSCD
北大核心
2011年第6期454-456,共3页
Chinese Journal of Industrial Hygiene and Occupational Diseases
关键词
乙酸
丙酸
丙烯酸
甲基丙烯酸
工作场所空气
色谱法
气相
Acetic acid
Propionic acid
Acrylic acid
Methylacrylic acid
Workplace air
Silica gel
Gas chromatography
