空气中苯、甲苯和二甲苯的测定.ppt

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1、空气中苯、甲苯和二甲苯的测定溶剂解吸-气相色谱法实习指导老师：郑丹Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.MOEKeyLaboratoryofEnvironmental&Health,InstituteofEnvironmentalMedicine,SchoolofPublicHealth【目的和要求】掌握气相色谱法测定空气中苯、甲苯和二甲苯的基本原理和操作技术；熟悉气相色谱仪器的基本操作和参数设置；了解玻璃毛细管色谱住条件的

2、优化；出峰时间定性的方法。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.MOEKeyLaboratoryofEnvironmental&Health,InstituteofEnvironmentalMedicine,SchoolofPublicHealth【原理】空气中的苯、甲苯、二甲苯用活性碳管采集，二硫化碳解吸后进样，经色谱柱分离，氢焰离子化检测器检测，以保留时间定性，峰面积定量。Evaluationonly.Createdwi

3、thAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.MOEKeyLaboratoryofEnvironmental&Health,InstituteofEnvironmentalMedicine,SchoolofPublicHealth【仪器及试剂】1.活性碳采样管：6×75mm，溶剂解吸型，内装100mg/50mg活性碳。2.空气采样器：QC-2B型大气采样仪，流量0.1-1.5L/min。3.玻璃器皿：具塞比色管，10ml；移液管，10mL，微量注射器：10、5l。4.二硫化碳：

4、色谱鉴定无干扰杂峰。5.苯、甲苯和二甲苯：分析纯，纯度99.5%以上。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.MOEKeyLaboratoryofEnvironmental&Health,InstituteofEnvironmentalMedicine,SchoolofPublicHealthEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.

5、0.Copyright2004-2011AsposePtyLtd.MOEKeyLaboratoryofEnvironmental&Health,InstituteofEnvironmentalMedicine,SchoolofPublicHealthEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.MOEKeyLaboratoryofEnvironmental&Health,InstituteofEnvironmentalMedicin

6、e,SchoolofPublicHealth6.气相色谱仪（GCAgilent6890N）条件：进样口250℃，分流比（30.0：1），载气：高纯氮气，玻璃毛细管柱：HP-5毛细管色谱柱，恒流模式，流量：1.2ml/min。柱温80℃，保持7min。氢焰离子化检测器（FID）：300℃。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.MOEKeyLaboratoryofEnvironmental&Health,InstituteofE

7、nvironmentalMedicine,SchoolofPublicHealthEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.MOEKeyLaboratoryofEnvironmental&Health,InstituteofEnvironmentalMedicine,SchoolofPu