大体积程序升温汽化进样技术用于柴油机多环芳香烃的检测  

Optimization and Application of Programmable Temperature Vaporization Large-Volume Injection on the Analysis of PAH Emissions from Diesel Engine

作　　者：何浩然[1] 宋崇林[1] 张华伟[1] 吕刚[1] 宋金瓯[1] 王林[1] 裴毅强[1] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072

出　　处：《内燃机学报》2012年第2期149-153,共5页Transactions of Csice

基　　金：国家自然科学基金资助项目(51076115);天津市应用基础及前沿技术研究计划资助项目(09JCZDJC25100)

摘　　要：为了降低气相色谱-质谱联用法(GC-MS)中多环芳香烃(PAHs)的检测限,使GC-MS技术能够更准确地检测柴油机燃烧生成的痕量PAHs,选择了程序升温汽化(PTV)进样与GC-MS技术联用(PTV-GC-MS),并对PTV进样参数进行了优化.结果表明,进样初始温度为40,℃、出口时刻为0.55,min及出口流量为10,mL/min时,与分流/不分流进样相比,PTV进样对16种PAHs检测限降低,相对标准偏差(RSD)在1.12%～6.07%,完全满足柴油机燃烧过程痕量PAHs的检测要求.The programmable temperature vaporizing（PTV）large-volume injection and GC-MS method（PTV-GC-MS）was employed in this study to decrease the detection limit of trace polycyclic aromatic hydrocarbons（PAHs）,which detects the trace PAHs more accurately from diesel engine exhaust.After optimization of PTV injection parameters,the sample initial temperature,exporting time and exporting flow rate are set at 40,℃,0.55,min and 10,mL/min respectively.Compared with the split/splitless,the detection limits of 16 PAHs are extended after PTV injection,and the average relative standard deviation（RSD）values varies within the range of 1.12%-6.07%,which meet fully the requirements for the detection of trace substances.

关 键 词：柴油机 多环芳香烃 程序升温汽化 气相色谱-质谱联用 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]