The effect of the presence of foreign salts on the formation of gaseous ions for electrospray and laser spray

Rapid Communications in Mass Spectrometry : RCM
Kenzo HiraokaAtsushi Takamizawa

Abstract

The effect of the presence of foreign salts (NaCl, aerosol OT, tetra-n-hexylammonium bromide, and CH3COONH4) on the formation of gaseous ions for electrospray (ES) and laser spray (LS) was studied in the positive and negative modes of operations. The ion signals for amino acids show sudden decrease with the concentration of foreign salts greater than 10(-5) M for both ES and LS. When the surface-active counter ions were added, the signal intensities showed a marked decrease for both ES and LS. This may be due to the enrichment of the surface-active counter ions on the surface of the charged droplets. When CH3COONH4 was added to an aqueous solution of 10(-6) M lysozyme chloride, an increase of the signal intensities for (lysozyme+nH)n+ and a decrease in the values of n were observed. The decrease in n may be due to the salt formation of (lysozyme+nH)n+ with the negative acetate ion leading to the reduction of positive charges.

References

Jun 29, 1999·Journal of the American Society for Mass Spectrometry·T L ConstantopoulosC G Enke
Oct 19, 1999·Rapid Communications in Mass Spectrometry : RCM·T KojimaK Hiraoka
Aug 10, 2000·Rapid Communications in Mass Spectrometry : RCM·I KudakaK Hiraoka
Oct 25, 2001·Rapid Communications in Mass Spectrometry : RCM·K HiraokaK Ueda
Apr 23, 2004·Journal of Mass Spectrometry : JMS·Kenzo Hiraoka

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Citations

May 24, 2005·Journal of the American Society for Mass Spectrometry·Atsushi TakamizawaKenzo Hiraoka
Apr 15, 2014·Journal of the American Society for Mass Spectrometry·Anna C SusaEvan R Williams
Mar 24, 2009·Journal of Mass Spectrometry : JMS·Kentaro YoshimuraSen Takeda
Apr 12, 2007·Electrophoresis·Chiu-Tang ChienGuor-Rong Her
Jul 11, 2006·Journal of Mass Spectrometry : JMS·Xiangguo ShiSatoko Akashi
Jul 18, 2008·Rapid Communications in Mass Spectrometry : RCM·Atsushi TakamizawaKenzo Hiraoka
Feb 24, 2012·Journal of Mass Spectrometry : JMS·Atsushi TakamizawaKenzo Hiraoka
Oct 14, 2016·Journal of the American Society for Mass Spectrometry·Anna C SusaEvan R Williams

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