Analysis of benzene polycarboxylic acids and nitro-benzene polycarboxylic acids as molecular tracers of black carbon by using liquid chromatography-mass spectrometry

doi:10.3724/SP.J.1123.2015.10045

Abstract

Abstract:

The benzene polycarboxylic acid (BPCA) method is an important molecular marker method for black carbon and dissolved black carbon quantification while the separation and quantification of benzene polycarboxylic acids and nitro-benzene polycarboxylic acids are the key process. In order to use mass spectrometer to solve the issue of identification of benzene polycarboxylic acids and nitro-benzene polycarboxylic acids due to the lack of the standards of some of the target compounds, a liquid chromatography-mass spectrometry method was proposed. It made the experimental procedures easier and faster than using the gas chromatography mass spectrometry, and would promote the use of the BPCA method. A Phenomenex Synergi Polar RP column was used. The digestion productions of black carbon and dissolved black carbon were gradiently eluted by the mobile phases of 0.5%(v/v) aqueous formic acid solution and methanol with the flow rate of 0.5 mL/min at 35 ℃. The determination was conducted by an ion trap mass spectrometer in negative electrospray ionization (ESI) mode under full scan and selected ion monitoring (SIM) modes. Simultaneously the three-dimensional ultraviolet spectra were collected by a photo diode array detector. The LC-MS method was proved to be suitable for the analysis of environmental black carbon and dissolved black carbon.

Key words: benzene polycarboxylic acids, black carbon, dissolved black carbon, liquid chromatography-mass spectrometry (LC-MS), nitro-benzene polycarboxylic acids

CLC Number:

O658

HUANG Guopei, CHEN Yingjun, TIAN Chongguo, LIU Ying. Analysis of benzene polycarboxylic acids and nitro-benzene polycarboxylic acids as molecular tracers of black carbon by using liquid chromatography-mass spectrometry[J]. Chinese Journal of Chromatography, 2016, 34(3): 306-313.

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