引用本文:
胡斌, 杨水平, 张燮, 胡秀丽, 陈焕文. 偶氮胂Ⅲ的电喷雾质谱行为[J]. 应用化学,
2008, 25(5): 510-513.
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.
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.
偶氮胂Ⅲ的电喷雾质谱行为
English
Multiple Stage Electrospray Ionization Mass Spectrometry of Arsenazo Ⅲ
Abstract:
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.
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Key words:
- arsenazo Ⅲ
- / ESI
- / tandem mass spectrometry
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