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[目的]研究并建立适用于工作场所空气中正丙醇的定量检测方法。[方法]工作场所空气中正丙醇由活性炭管采集,经体积比为1∶100的异丙醇-二硫化碳混合溶剂解吸后,经石英弹性毛细管柱HP-INNOWAX(30.0 m×0.53 mm×1.0μm)分离,氢焰离子化检测器检测,标准曲线法定量。[结果]正丙醇浓度在10~500μg/m L范围内和峰面积呈线性关系,回归方程y=2.12 x+1.96,相关系数r=0.999 9(P<0.05)。以3.0 L采样量计,方法最低检出浓度0.09 mg/m3,最低定量浓度0.30 mg/m3;不同浓度加标样品测定结果的相对标准偏差为1.7%~3.6%,解吸效率89.3%~94.7%,采样效率>96%,100 mg活性炭对正丙醇的穿透容量为16 mg;采样后的活性炭管在室温条件下至少可放置7 d。[结论]建立的工作场所空气中正丙醇溶剂解吸-气相色谱测定方法准确可靠、灵敏度高、稳定性良好,适用于工作场所空气中正丙醇的现场检测。
[Objective] The research aimed to study and establish the quantitative detection method for n-propanol in the air of workplace. [Method] The n-propanol in the air of the workplace was collected by activated charcoal tube and desorbed by isopropyl alcohol-carbon disulfide mixed solvent with a volume ratio of 1: 100. The sample was purified by quartz capillary column HP-INNOWAX (30.0 m × 0.53 mm × 1.0 μm) Separation, hydrogen flame ionization detector detection, standard curve method. [Result] The linear relationship between n - propanol concentration and peak area in the range of 10 ~ 500 μg / m L was obtained. The regression equation was y = 2.12 x + 1.96 and the correlation coefficient was 0.999 9 (P <0.05). The minimum detectable concentration was 0.09 mg / m3 and the lowest concentration was 0.30 mg / m3 with 3.0 L sample volume. The relative standard deviations (RSDs) were 1.7% ~ 3.6% and the desorption efficiencies were 89.3% ~ 94.7% , The sampling efficiency was> 96%, the permeation volume of 100 mg activated carbon to n-propanol was 16 mg, and the sampled activated carbon tube could be placed for at least 7 days at room temperature. [Conclusion] The n-propanol solvent-desorption-GC method established in the workplace was accurate, reliable, sensitive and stable. It was suitable for on-site detection of n-propanol in the air of workplace.