工作场所空气中己二腈气相色谱测定方法研究

Study on determination methods by gas chromatography for hexanedinitrile in workplace air

目的:建立工作场所空气中己二腈气相色谱的检测方法。方法:硅胶管吸附空气中己二腈,无水乙醇解吸液解吸,氢焰离子化检测器检测。结果:标准曲线回归方程为Y=0.125X-3.55,相关系数r=0.9999;检出限为1.6μg/ml;高、中、低3个浓度6 d 6次测定的变异系数分别为1.3%、1.5%、2.1%;平均解吸效率为95.1%;穿透容量大于12.8 mg己二腈(200 mg硅胶);采样效率100%,室温下采样后硅胶管可放置7 d。结论:本方法适用于工作场所空气中己二腈浓度的测定。

Objective ：To establish determination methods by gas chromatographyfor hexandinitrile in workplace air, Methods： The analyle of hexanedinitrile in air was adsorbed by blangle tube and desorbed absolute alcohol, diction was performed by flame ionization（FID）. Results： Recursive equation of standard curve： Y = 0, 125X - 3.55, the correlation coefficients r = 0. 9999. The detection limit was 1.6 μg/ml. Relative standard deviations were 1.3%, 1, 5% ,2. 1%. Mean desorption efficiency was 95. 1%. The breakthrough capacity of 200 mg blangel for hexanedinitrile was above 12, 8 mg. The sampling rate was 100%. Hexanedinitrile of the blangel tube was sable for 7 days, Conclusion：The methods can be adapted to detect hexanedinitrile in workplace air.