International Journal of Analytical Chemistry / 2015 / Article / Fig 1

Research Article

Fast Differential Analysis of Propolis Using Surface Desorption Atmospheric Pressure Chemical Ionization Mass Spectrometry

Figure 1

Schematic diagram of SDAPCI source and optimization of SDAPCI source conditions. (a) Schematic diagram of SDAPCI source for measurement of propolis. (b)–(e) Optimization of SDAPCI source conditions including the effect of discharge voltage on signal intensity (b), the effect of the angles α (c), the effect of the distance between the discharge tip and the ion entrance (d), and the effect of the temperature of the heated capillary (e). All the optimization experiments were based on the signal intensity of the peak signal at 121 m/z for sample 1 (HLJ). Each point represents an average of six measurements.

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