کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1195960 | 964434 | 2009 | 10 صفحه PDF | دانلود رایگان |
A general and sensitive method for detecting divalent anions by ESI-MS and LC/ESI-MS as positive ions has been developed. The anions are paired with tricationic reagents to form positively charged complexes. In this study, four tricationic reagents, 2 trigonal and 2 linear, were used to study a wide variety of anions, such as disulfonates, dicarboxylates, and inorganic anions. The limits of detection for many of the anions studied were often improved by tandem mass spectrometry. Tricationic pairing agents can also be used with chromatography to enhance the detection of anions. The tricationic reagents were also used to detect monovalent anions by monitoring the doubly charged positive complex. The limits of detection for some of the divalent anions by this method are substantially lower than by other current analytical techniques.
Graphical AbstractTricationic ion-pairing agents are used for the detection of divalent anions as singly charged complexes in positive ion mode ESI-MS.Figure optionsDownload high-quality image (95 K)Download as PowerPoint slide
Journal: Journal of the American Society for Mass Spectrometry - Volume 20, Issue 3, March 2009, Pages 529–538