[Stable carbon isotope analysis method for the atmospheric formaldehyde].
A method of compound-specific stable carbon isotopic analysis for the research about the sources of atmospheric formaldehyde was preliminary studied using gas chromatography/combustion/isotope ratio mass spectrometry (GC/C/IRMS) via 2, 4-dinitrophenylhydrazine (DNPH) derivatization. In order to evaluate the reproducibility, the accuracy and the carbon isotope effects of the method, formaldehyde with different delta 13C values were used to simulate the sampling procedure. The results show that the maximal analytical deviation for all formaldehyde 2, 4-dinitrophenylhydrazone is 0.3 per thousand and the average deviations between the determined and theoretical delta 13C values of them are 0.24 per thousand +/- 0.14per thousand (ranged from 0.03 per thousand to 0.35 per thousand), less than 0.5 per thousand the technical specifications of the GC/C/IRMS system. These mean that no carbon isotopic fractionation occurred during the procedure. The study for the indoor and outdoor atmospheric formaldehyde in the restaurant show that the stable carbon isotopic compositions are significant different for different sources of formaldehyde. The present method could provide valuable information about the sources of atmospheric formaldehyde.
Yu
Ying-Xin
YX
Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200072, China.
Wen
Sheng
S
Feng
Yan-Li
YL
Bi
Xin-Hui
XH
Wang
Xin-Ming
XM
Sheng
Guo-Ying
GY
Fu
Jia-Mo
JM
D000393:Air Pollutants / Q000032:analysis*; D002247:Carbon Isotopes / Q000032:analysis; D005557:Formaldehyde / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D010659:Phenylhydrazines / Q000032:analysis*
D000393:Air Pollutants; D002247:Carbon Isotopes; D010659:Phenylhydrazines; D005557:Formaldehyde; C004787:2,4-dinitrophenylhydrazine