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目的:建立毛细管柱气相色谱法同时测定工作场所空气中丙酮、乙酸乙酯、苯、甲苯、对二甲苯、间二甲苯、邻二甲苯、苯乙烯、环己酮等多组分有机化合物的方法。方法:采用活性炭管吸附工作场所空气中丙酮、乙酸乙酯、苯、甲苯、对二甲苯、间二甲苯、邻二甲苯、苯乙烯、环己酮,用二硫化碳解吸后进样,经HP-INNOWAX(30 m×320μm×0.25μm)毛细管柱分离,初温60℃保持10 min,升温速率10℃/min至100℃保持2 min,分流比:12∶1。结果:该法分离效果好,各组分在测定的线性范围内,相关系数均大于0.9997,各组份方法检出限在0.26μg/ml～0.72μg/ml之间,保留时间相对标准偏差在0.000%～0.021%之间,峰面积相对标准偏差在0.23%～0.51%之间。结论:该方法适合工作场所空气中丙酮、乙酸乙酯、苯、甲苯、对二甲苯、间二甲苯、邻二甲苯、苯乙烯、环己酮的同时测定。
OBJECTIVE: To establish a method for simultaneous determination of multi-component organic compounds such as acetone, ethyl acetate, benzene, toluene, paraxylene, metaxylene, ortho-xylene, styrene and cyclohexanone in the air by capillary gas chromatography . Methods: Activated charcoal tubes were used to adsorb acetone, ethyl acetate, benzene, toluene, p-xylene, m-xylene, o-xylene, styrene and cyclohexanone in the air of the workplace and desorbed with carbon disulfide. (30 m × 320 μm × 0.25 μm) capillary column. The initial temperature was maintained at 60 ℃ for 10 min. The temperature was raised from 10 ℃ / min to 100 ℃ for 2 min. The split ratio was 12: 1. Results: The method has good separation efficiency. The correlation coefficient of each component in the linear range of the determination is greater than 0.9997. The detection limits of each component are between 0.26μg / ml and 0.72μg / ml. The relative standard deviations 0.000% ~ 0.021%, the relative standard deviation of peak area is between 0.23% ~ 0.51%. Conclusion: This method is suitable for the simultaneous determination of acetone, ethyl acetate, benzene, toluene, p-xylene, m-xylene, o-xylene, styrene and cyclohexanone in the air of workplace.