Issue 2, 2012

Coupling of stir bar sorptive extraction with single photon ionization mass spectrometry for determination of volatile organic compounds in water

Abstract

A home-made stir bar sorptive extraction (SBSE) apparatus was combined to a single photon ionization time-of-flight mass spectrometer (SPI-TOFMS) for rapid and sensitive determination of trace volatile organic compounds (VOCs) in water. The home-made SBSE bar, low-cost and disposable, was used for VOCs extraction. A thermal desorption (TD) device was designed to desorb the analytes from the SBSE bar, and a high throughput interface was developed to transfer the analytes into the ionization chamber of the SPI-TOFMS. The combination of large extraction volume of SBSE bar, and the direct measurement power of SPI-TOFMS enable a short analysis time for VOCs in water with high sensitivity, for example the limits of detection (LODs) were in the range of 7.4–11.1 ng L−1 for benzene, toluene, and p-xylene (BTX) within 15 min. BTX aqueous solutions were chosen to demonstrate the quantitative capability, the linear range was from 0.05 to 100 μg L−1 and the correlation coefficients were better than 0.996. The proposed method was successfully applied for the analysis of VOCs in urban river water.

Graphical abstract: Coupling of stir bar sorptive extraction with single photon ionization mass spectrometry for determination of volatile organic compounds in water

Article information

Article type
Paper
Submitted
19 Sep 2011
Accepted
02 Nov 2011
First published
01 Dec 2011

Analyst, 2012,137, 513-518

Coupling of stir bar sorptive extraction with single photon ionization mass spectrometry for determination of volatile organic compounds in water

H. Cui, L. Hua, K. Hou, J. Wu, P. Chen, Y. Xie, W. Wang, J. Li and H. Li, Analyst, 2012, 137, 513 DOI: 10.1039/C1AN15876G

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