Evaporation of Charged Droplets in Atmospheric Pressure Spray Mass Spectrometry
スポンサーリンク
概要
- 論文の詳細を見る
Ions produced in atmospheric pressure spray (APS) ionization from aqueous solutions of sucrose and alanine are detected with a quadrupole mass spectrometer. The S/N ratios for their mass spectra are analyzed to study the evaporation of charged droplets, since they are detected as random noises. Two kinds of heated sampling orifices with thicknesses of 0.5 and 12.5 mm are compared. Higher ratios are obtained with the thicker one. The solution concentration dependence of the relative intensity of the cationized sucrose molecule suggests that ion evaporation does not take place in the sampling orifice and that the charged droplets produced by adiabatic expansion are suppressed by heating the vaporized solution. At the optimized pressures in the intermediate-pressure regions, 65 fmol of sucrose is detected. However, the noise level is still determined by detecting charged droplets, which are likely to be produced by the spray in the atmospheric-pressure region.
- 日本質量分析学会の論文
著者
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HIRABAYASHI Atsumu
Central Research Laboratory, Hitachi Ltd.
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Sakairi Minoru
Central Research Laboratory, HITACHI, Ltd.
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TAKADA Yasuaki
Central Research Laboratory, Hitachi, Ltd.
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Takada Yasuaki
Central Research Laboratory Hitachi Ltd.
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Hirabayashi Atsumu
Central Research Laboratory Hitachi Ltd.
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