1、理理HLn假想:22212)(16)(54.5)(WtWttnRRR理uCuBAH/split mode的注射方式应用于浓度较高的分析样品 Split less Mode 在样品于衬管中汽化及进入柱期间保持关闭,在进样后指定时间打开分流阀,这可避免由于进样体积大和柱流量小引起的溶剂拖尾。适合于低浓度的样品测试。PartitionKCCSGCS=Analyteconcentration in Sample,CG =Analyte Conc.in Gas Phase原理原理1、恒温阶段2、加压阶段3、进样阶段静态顶空采用气体压力平衡,时间进样系统,瓶内和色谱柱由于有压力差,自动进样,用进样时间来控
2、制进样量。Sampling headSampling needleSample vialAdsorbent trapGC columnDesorption flow inletIsolation gas inletMain gas inletVentSampling headNeedle purgecolumndetectorsealvialovenvalvetrapcolumndetectorsealvalvevialoventrapcolumn isolationcolumndetectorsealvalvevialoventrapcolumndetectorsealvalvevialoventrapcolumndetectorsealvalvevialoventrap