Quantitative analysis of nitro-polycyclic aromatic hydrocarbons in PM2.5 samples with graphene as a matrix by MALDI-TOF MS

Nengxuan Ma, Wei Bian, Ruijin Li, Hong Geng, Jiangang Zhang, Chuan Dong, Shaomin Shuang*, Zongwei CAI

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

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

Original languageEnglish
Pages (from-to)3967-3971
Number of pages5
JournalAnalytical Methods
Volume7
Issue number9
DOIs
Publication statusPublished - 7 May 2015

Scopus Subject Areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Engineering(all)

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