论文部分内容阅读
目的:用静态染毒柜进行正己烷染毒,研究染毒柜内正己烷浓度变化与时间关系。方法:分别在染毒后0、60、120、180和240 min吸取静态染毒柜中的气体,用气相色谱仪测定正己烷浓度。结果:低剂量正己烷(2.0g/m3)在染毒0~180 min内浓度相对较稳定,不同时间段正己烷浓度没有显著性差别(P>0.05),直到240 min时浓度才有明显下降(P<0.05)。中剂量正己烷(10.0 g/m3)在染毒0~60 min时间浓度变化较小(P>0.05),120 min时浓度明显下降(P<0.05),但120~180 min浓度又趋于稳定。高剂量正己烷(50.0 g/m3)染毒,其浓度随染毒时间延长明显下降,各检查点浓度都有显著性差别(P<0.05)。结论:使用静态染毒柜染毒低剂量正己烷浓度能维持较长时间的恒定,中剂量维持浓度恒定时间较短,高剂量正己烷染毒不适合用静态染毒柜。
OBJECTIVE: To study the effect of n-hexane concentration on the concentration of n-hexane in a toxin cabinet with time. Methods: The gas in static exposure cabinet was drawn at 0, 60, 120, 180 and 240 min after exposure respectively, and the concentration of n-hexane was determined by gas chromatography. Results: The concentration of n-hexane (2.0 g / m3) was relatively stable within 0-180 min after exposure, and there was no significant difference between n-hexane concentrations at different time points (P> 0.05) (P <0.05). The concentration of n-hexane (10.0 g / m3) changed little from 0 to 60 min after exposure (P> 0.05), but decreased significantly at 120 min (P <0.05) . High concentration of n-hexane (50.0 g / m3) exposure, its concentration decreased significantly with the exposure time, the concentration of each checkpoint was significantly different (P <0.05). Conclusion: The concentration of low-dose n-hexane in a static toxin cabinet can be kept constant for a long time, the concentration of the middle dose to maintain a constant time is short, and high-dose n-hexane is not suitable for use in a static toxin cabinet.