HRGC-QMS筛查焚烧炉排放废气中PCDD/Fs的技术  

Screen-Level Determination of PCDD/Fs in Flue Gases from Waste Incinerators by the Use of HRGC-QMS

作　　者：任玥[1] 许鹏军[1] 周志广[1] 李楠[1] 齐丽[1] 刘爱民[1] 黄业茹[1] 

机构地区：[1]国家环境分析测试中心,国家环境保护二噁英污染控制重点实验室,北京100029

出　　处：《环境科学研究》2012年第11期1265-1271,共7页Research of Environmental Sciences

基　　金：国家环境保护公益性行业科研专项(200709057;200909095)

摘　　要：建立并优化了应用HRGC-QMS(高分辨气相色谱-四极杆质谱)对废弃物焚烧设施排放废气中17种2,3,7,8-PCDD/Fs进行筛查测定的方法,并对其关键技术进行了研究.结果表明,严格的样品净化程序和优化的仪器参数提高了低分辨质谱在二英类定量分析中的准确性和精密度,仪器检出限为0.5～5 pg,方法检出限为0.9～20 pg,提取内标回收率符合二英类分析要求.利用该方法对57个废弃物焚烧设施排放的废气样品进行检测,得到的毒性当量(TEQ)浓度与高分辨磁质谱(标准分析仪器)的测定结果具有良好的线性关系(R2=0.978 5).An analytical method was established and optimized for determining seventeen 2,3,7,8-substituted congeners of PCDD/Fs in flue gases from municipal and hazardous waste （including medical waste） incinerators by using a High Resolution Gas Chromatography- Quadrupole Mass Spectrometer （HRGC-QMS）. Key procedures during pre-treatments and analysis processes were investigated. The results showed that the accuracy and precision of dioxin quantification by QMS were enhanced if strict clean-up procedures coupled with optimized instrument parameters were followed. The instrument and method detection limits of tetra- to octa-CDD/Fs were 0. 5-5 pg and 0.9-20 pg, respectively. Recoveries of LCS fell in the acceptable ranges of dioxin analysis. Fifty-seven flue gases were analyzed with this method, and the results were compared with those measured by High Resolution Gas Chromatography-High Resolution Mass Spectrometer （HRGC-HRMS）. The I-TEQ concentrations of the samples obtained from the two methods showed a good linear relationship （R2 = 0. 9785）.

关 键 词：高分辨气相色谱-四极杆质谱(HRGC-QMS) 废弃物焚烧设施 废气 二英类 

分 类 号：X502[环境科学与工程—环境工程]