Thermal Desorption-Gas Chromatography or Gas Chromatograph-Mass Spectrometry for Analysis of Semi-Volatile Compounds on Atmospheric Particulate Matters
10.11895/j.issn.0253-3820.131094
- VernacularTitle:热解析-气相色谱或气相色谱-质谱法分析大气可吸入颗粒物中的半挥发性有机化合物
- Author:
Hu MENG
;
Jinghong ZHAO
;
Chunfeng DUAN
;
Liang HAO
;
Yafeng GUAN
- Publication Type:Journal Article
- Keywords:
Atmospheric particulate matter;
Semi-volatile organic compound;
Thermal desorption;
Particulate matter 2.5
- From:
Chinese Journal of Analytical Chemistry
2014;(7):931-936
- CountryChina
- Language:Chinese
-
Abstract:
A thermal desorption ( TD) device was developed and coupled to gas chromatography ( GC) or gas chromatography-mass spectrometry ( GC-MS ) for the qualitative and quantitative analysis of semi-volatile organic compounds on atmospheric particulate matters ( PM ) . The TD was operated by direct heating and placed on the GC injector, leading to high heating rate and easy transfer of analytes to GC without focusing of analytes by cold trap. For establishing the TD-GC method, the materials used for supporting PM samples, temperature and time of thermal desorption, and types of sample injection were investigated for detection of sixteen polycyclic aromatic hydrocarbons ( PAHs) and nine n-alkanes. The limits of detection of the proposed TD-GC method were in the range of 0. 014-0. 093 ng for PAHs, and 0. 016-0. 026 ng for n-alkanes, respectively, with the correlation coefficients of correlation above 0. 9975. The TD-GC method was applied to the determination of trace PAHs and n-alkanes on PM10 samples from three cities. The recoveries were in the range of 95%-135% ( PAHs) and 95%-115% ( n-alkanes) , respectively. Finally, the TD was coupled to GC-MS for comparison of the contents of PAHs and n-alkanes on PMx with different particulate size ( x=10 , 5, 2, 1, 0. 5, 0. 25, 0. 1).
