摘要
采用实验室自行研制飞行时间质谱仪对二噁英常见的关联产物多环芳烃进行了在线检测,选取二环至四环的多环芳烃芴、菲、蒽、萘、芘进行了测量并分析了仪器检测得到的信号。结果表明,该仪器对实验选取的多环芳烃具有良好的响应特性,检测浓度可达到25nmol/L(即体积浓度500ppbv),检测结果与实际物质浓度间具有良好的线性关系。使用最小二乘法拟合了浓度和信号强度的线性方程,实现了25～500nmol/L(体积浓度0.5～10ppmv)之间检测物质浓度的标定,为进一步发展烟气中的实际多环芳烃测量和浓度标定提供了参考。
Time-of-flight mass spectrometer （TOF-MS） was utilized for monitoring typical polycyclic aromatic hydrocarbons （PAHs） which are important correlation compounds of polychlorinated dibenzofurans （PCDD/Fs）. Fluorene, phenanthrene, anthracene, naphthalene and pyrene were measured in certain concentration. The signals were analyzed to assess the performance of the instrument to detect correlation compounds. Experimental results showed that TOF-MS has a good response capability to the tested PAHs. The limit of detection could reach 25×10-9 mol/L（volume concentration is 500 part-per-billion level （ppbv）. The signal intensity showed a good linear relation with real concentration levels5. The mass calibration from 25×10-9 mol/L to 500×10-9 mol/L（volume concentration from 0.5 to 10 ppmv （volume concentration of part-permillion level）） was carried out preliminary by fitting between on-line test signal intensity and concentration using the method of least square. The results supplied a feasibility to investigate the on-line monitoring method of PAHs in flue gas.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2010年第6期859-863,共5页
Chinese Journal of Analytical Chemistry
基金
国家高科技研究发展计划(No.2007AA061302)
国家高科技研究发展计划(No.2007AA06Z336)资助项目
关键词
飞行时间质谱仪
在线检测
多环芳烃
Time-of-flight mass spectrometer
On-line monitoring
Polycyclic aromatic hydrocarbons
