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Citation: HU Bin, YANG Shui-Ping, ZHANG Xie, HU Xiu-Li, CHEN Huan-Wen. Multiple Stage Electrospray Ionization Mass Spectrometry of Arsenazo Ⅲ[J]. Chinese Journal of Applied Chemistry, ;2008, 25(5): 510-513. shu

Multiple Stage Electrospray Ionization Mass Spectrometry of Arsenazo Ⅲ

HU Bin ^a ,
YANG Shui-Ping ^a ,
ZHANG Xie ^a ,
HU Xiu-Li ^b ,
CHEN Huan-Wen ^a,b,,

1.
a East China Institute of Technology, Fuzhou 344000;
2.
b Chemistry College, Jilin University, Changchun 130023

Corresponding author: CHEN Huan-Wen,
Received Date: 6 May 2007
Available Online: 29 August 2007
Fund Project: 国家自然科学基金(20505003) (20505003)国家科技部公益基金(2005DIB6J232)资助项目 (2005DIB6J232)

Electron spray ionization mass spectrometry (ESI-MS) was employed for direct investigation of arsenazo Ⅲ aqueous solutions.Experimentally,it was found that arsenazo Ⅲ formed singly (m/z 775) or doubly charged ions (m/z 387) by deprotonation in the ESI process.Under the experimental conditions,the signal of m/z 387 was 20 times higher than that of m/z 775.The formation of the negative ions of arsenazo Ⅲ was favored in weakly acidic solution.The characteristic fragmentation patterns of the anions (i.e.,m/z 775,m/z 387) of arsenazo Ⅲ were obtained by multiple stage tandem mass spectrometry with a collision energy of 15%~25%,providing evidence for identifying arsenazo Ⅲ in a complex mixture.The data showed that a low limit detection of 0.74×10^-15 g was obtained with tandem mass spectrometry for the doubly charged anions (m/z 387),showing that electrospray ionization tandem mass spectrometry is a useful tool for the study and detection of arsenazo Ⅲ.
- arsenazo Ⅲ,
- ESI,
- tandem mass spectrometry
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