title: 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.
authors: Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
authors: Huapeng
authors: H
authors: Cui
authors: Lei
authors: L
authors: Hua
authors: Keyong
authors: K
authors: Hou
authors: Jing
authors: J
authors: Wu
authors: Ping
authors: P
authors: Chen
authors: Yuanyuan
authors: Y
authors: Xie
authors: Weiguo
authors: W
authors: Wang
authors: Jinghua
authors: J
authors: Li
authors: Haiyang
authors: H
authors: Li