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. Author manuscript; available in PMC: 2011 Apr 12.
Published in final edited form as: Electrophoresis. 2010 Apr;31(7):1162–1174. doi: 10.1002/elps.200900739

Figure 6.

Figure 6

The separation of blank apple juice (a) and NCMs pesticides spiked apple juice sample (b) on the AAUA-EDMA monolithic column in CEC-APPI-MS. Experimental conditions: monolithic column, 40 cm (effective length) /60 cm (total length) × 100µm ID; mobile phase, 35% ACN in 5 mM ammonium acetate, pH 6.5; applied voltage, 30 kV; electrokinetic injection, 5 kV for 3s; sample concentration, 100 ng/mL for each. APPI/MS parameters: sheath liquid composition, methanol-water (50:50, v/v), 5mM ammonium, 2% acetone; sheath liquid flow rate, 20 µL/min; drying gas flow rate, 2 L/min; nebulizer pressure, 5 psi; drying gas temperature, 200 °C; vaporizer temperature, 200 °C; capillary voltage, 2500 V; fragment voltage, 60 V; monolithic capillary outlet position, −0.4 mm. The inset table describes the recoveries of the nine NMCs.