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目的探讨空气中二硫化碳的气相色谱检测的计算方法。方法采用气相色谱分离,FPD检测器检测,并考察了甲苯作解吸液从活性炭上解吸二硫化碳的解吸效率。结果采用毛细管柱分离、FPD检测器时,峰面积和浓度关系以采用二次方程的拟合方式更为恰当,回归方程:y=0.001 x2+0.081 x+0.118 7,r=1,计算的浓度和配制浓度偏差小于6%,重复测定的RSD小于2%,定量下限为0.21μg/ml,用来测定溶液中二硫化碳的浓度能满足工作要求。采用甲苯作解吸液测定的解吸效率在20%～27%之间。结论建立的GC-FPD分离检测,二次方程拟合标准曲线法可以应用于溶液中二硫化碳的定量测定,但用甲苯作解吸液的条件甚至是其他的解吸液来解吸活性炭上的二硫化碳的技术还需要进一步的研究。
Objective To investigate the gas chromatographic method for the determination of carbon disulfide in air. Methods Gas chromatography and FPD detector were used to detect the desorption efficiency of carbon disulfide from activated carbon. Results When capillary column separation and FPD detector were used, the relationship between peak area and concentration was more fitting with the quadratic equation. The regression equation was: y = 0.001 x2 + 0.081 x + 0.118 7, r = 1, calculated concentration The RSDs of less than 6%, less than 2% RSD and the lower limit of quantification were 0.21μg / ml, which were used to determine the concentration of carbon disulfide in the solution to meet the working requirements. Desorption efficiency measured with toluene for desorption was between 20% and 27%. Conclusion The established GC-FPD separation and calibration curve fitting method of quadratic equation can be applied to the quantitative determination of carbon disulfide in solution. However, the technology of desorbing carbon disulfide on activated carbon by using toluene as the desorption solution or even other desorption solution Need further research.