Department of Chemistry
Quantitative analysis of nitro-polycyclic aromatic hydrocarbons in PM2.5 samples with graphene as a matrix by MALDI-TOF MS
© The Royal Society of Chemistry 2015. In this work, we developed a novel quantitative analysis method for detecting nitropolycyclic aromatic hydrocarbons (nitro-PAHs) in PM2.5 samples with graphene as a matrix using MALDI-TOF MS. A good linearity was obtained for the typical four nitro-PAHs, namely 1-nitropyrene (1-NP), 2-nitrofluorene (2-NFL), 6-nitrochrysene (6-NC) and 9-nitroanthracene (9-NA) with the correlation coefficient better than 0.985 by means of 9-nitroanthracene-d9 as the internal standard. The average recoveries of this method were from 69.2% to 119.4%, and the inter-day precisions were less than 12.3% with intra-day precisions less than 20.7%. The limits of detection for 1-NP, 2-NFL, 6-NC and 9-NA were 0.74, 8.04, 2.67 and 2.31 ng μL-1, respectively. We have validated the practicality by the analysis of nitro-PAHs in PM2.5 samples collected during haze weather in Taiyuan of China. The mass concentrations of Σ-nitropyrene, Σ-nitrofluorene, Σ-nitrochrysene and Σ-nitroanthracene on the collected PM2.5 samples were detected at levels of 0.38 to 3.04 ng m-3, 0.21 to 0.43 ng m-3, 0.19 to 2.38 ng m-3, and 9.55 to 16.52 ng m-3, respectively. The present method proved to be a good candidate for simple, fast and eco-friendly determination of nitro-PAHs by using MALDI-TOF MS coupled with an internal standard method. This journal is
Source Publication Title
Royal Society of Chemistry
Ma, Nengxuan, Wei Bian, Ruijin Li, Hong Geng, Jiangang Zhang, Chuan Dong, Shaomin Shuang, and Zongwei Cai. "Quantitative analysis of nitro-polycyclic aromatic hydrocarbons in PM2.5 samples with graphene as a matrix by MALDI-TOF MS." Analytical Methods 7.9 (2015): 3967-3971.