A novel method for determination of inorganic oxyanions by electrospray ionization mass spectrometry using dehydration reactions

Journal of Mass Spectrometry : JMS
Hirochika KojimaHiroki Hotta

Abstract

Novel methods for the determination of inorganic oxyanions by electrospray (ES) ionization mass spectrometry have been developed using dehydration reactions between oxyanions and carboxylic acids at the ES interface. Twelve oxyanions (VO3 (-) , CrO4 (2-) , MoO4 (2-) , WO4 (2-) , BO3 (3-) , SiO3 (2-) , SiO4 (4-) , AsO4 (4-) , AsO2 (-) , SeO4 (2-) , SeO3 (2-) and NO2 (-) ), out of 16 tested, reacted with at least one of four aminopolycarboxylic acids, i.e. iminodiacetic acid (IDA), nitrilotriacetic acid (NTA), trans-1,2-diaminocyclohexane-N,N,N',N'-tetraacetic acid and triethylenetetramine-N,N,N',N″,N'″,N'″-hexaacetic acid, at the ES interface to produce the dehydration products that gave intense mass ion responses, sufficient for trace analysis. As examples, trace determinations of Cr(VI) and silica in water samples were achieved after online ion exchange chromatography, where the dehydration product of CrO4 (2-) and NTA (m/z 290) and that of SiO4 (4-) and IDA (m/z 192) were measured. The limits of detection of the respective methods were 17 nM (0.83 ng Cr/ml) for Cr(VI) and 0.17 μM (4.8 ng Si/mL) for SiO4 (4-) .

References

Mar 13, 2003·Journal of the American Chemical Society·Tom WatersAnthony G Wedd
Feb 18, 2006·Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences·Kayoko MinakataOsamu Suzuki
Aug 23, 2007·Analytical Chemistry·P Kalyani Martinelango, Purnendu K Dasgupta
Apr 13, 2010·Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences·Kayoko MinakataOsamu Suzuki
Sep 13, 2011·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Hiroki HottaKin-Ichi Tsunoda
Aug 15, 2012·The Journal of Physical Chemistry. a·Benjamin L HarrisRichard A J O'Hair
Mar 21, 2015·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Hiroki Hotta, Kin-ichi Tsunoda

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