摘要
[目的]通过实验检测溶剂解析气相色谱法测定室内空气中苯系物的有效性。[方法]采用活性炭管吸附空气中苯系物,经二硫化碳解析后通过气相色谱(DB-FFAP色谱柱,FID检测器)检测苯系物浓度。[结果]苯、甲苯、乙苯、邻二甲苯、间二甲苯、对二甲苯在DB-FFAP色谱柱上分离良好,标准曲线的线性相关系数均为0.9999,质控样品浓度在标样定值范围内,相对标准偏差为0.55%～0.87%,样品平均解析效率为90.5%～101.5%。某用户新装修房屋的卧室、客厅及书房等室内二甲苯浓度均超过0.20mg/m^3,苯、甲苯、乙苯浓度较低。[结论]溶剂解析气相色谱法准确性好,适用于室内空气中苯系物的浓度测定。
[ Objective ] Using solvent desorption gas chromatography to estimate the concentration of the benzene series chemicals in room air. [ Methods ] Charcoal absorption and carbon disulfide desorption were used for the sampling of benzene series chemicals and analysis was performed by gas chromatography （ DB-FFAP column, FID ）. [ Results ] Benzene, toluene, ethylbenzene, o-xylene, m-xylene, and p-xylene were well separated in the DB-FFAP column. The correlation coefficients of regression curves of benzene series chemicals were all greater than 0.9999. The concentration of the quality control samples was within the framework of the certified value. The relative standard deviation 0.55%-0.87% was obtained. The effieieneies of carbon disulfide desorption were between 90.5%-101.5%. The total xylene concentrations of the bedroom, sitting room and study room in a newly renovated house were exceeding 0.20 mg/m^3, while the concentrations of benzene, toluene, and ethylbenzene were low. [ Conclusion ] The method is compatible with concentration detection of benzene series chemicals in room air.
出处
《环境与职业医学》
CAS
北大核心
2011年第4期247-249,252,共4页
Journal of Environmental and Occupational Medicine
关键词
气相色谱
苯系物
室内空气
gas chromatography
benzene series
room air
