Atmospheric pressure glow discharge desorption mass spectrometry for rapid screening of pesticides in food

Flowing afterglow atmospheric pressure glow discharge tandem mass spectrometry (APGD-MS/MS) is used for the analysis of trace amounts of pesticides in fruit juices and oil fruit peel. The APGD source was rebuilt after Andrade et al. (Andrade et al.,Anal. Chem. 2008; 80: 2646-2653; 2654-2663) and mounted onto a hybrid quadrupole time-of-flight mass spectrometer. Apple, cranberry, grape and orange juices as well as fruit peel and salad leafs were spiked with aqueous solutions containing trace amounts of the pesticides alachlor, atrazine, carbenclazim, carbofuran, dinoseb, isoproturon, metolachlor, nietolcarb, propoxur and simazine. Best limits of determination (LODs) of pesticides in the fruit juices were achieved for metoicarb (I mu g/L in apple juice), carbofuran and dinoseb (2 mu g/L in apple juice); for the analysis of apple skin best LODs were 10 Pg/cm(2) of atrazine, nietolcarb and propoxur which corresponds to an estimated concentration of 0.01 mu g/kg apple, taking into account