摘要
采用气相色谱法定量分析了地下车库空气中苯系物（苯、甲苯、二甲苯）的浓度并于不同时间段采集地下车库的空气样品,研究了地下车库内苯系物的浓度随时间的变化特征及污染状况.研究结果表明：①在实验色谱条件下,用外标法测定苯系物的准确度较高,回收率为90％ ～ 110％；②苯系物浓度随时间的变化呈现明显的周期性,苯系物单体浓度与总量浓度随时间的分布特征相似,表现为早晨的浓度大于中午及傍晚；③苯系物总量和单体浓度远远高于室外；④地下车库苯系物浓度低于中国室内空气质量标准限值,但检测结果表明地下车库存在苯系物的污染,长期累积对人体健康构成潜在威胁.
The quantitative analysis for benzenes homologues （benzene,toluene,o.p.m-xylene） from air of underground garage and the distribution characteristic of benzenes concentration with time were studied by the result showed：①The veracity of quantitative analysis for benzenes homologues is good with 90％-110％ recoveries using external standard way under the GC condition.②The characteristic of benzenes homologues concentration with time showed periodicity.The single and total compounds had similar result that the concentration in the morning is greater than it at noon and in the evening.③Benzene and total monomer concentration much higher than outdoor.④Underground garage benzenes homologues concentrations lower than China＇s indoor air quality standards limit,but the test results show that the presence of underground garage of BTEX pollution,long-term accumulation of human health and pose potential threat.
出处
《中国环境监测》
CAS
CSCD
北大核心
2013年第5期32-37,共6页
Environmental Monitoring in China
基金
国家自然科学基金(21075024)
广州市科技计划(2010Y1-C021)
关键词
气相色谱法
苯系物
浓度随时间分布特征
污染
GC
benzene homologues
distribution character of concentration with time
pollution
