The pesticides were extracted from apples, beans, lettuce, peppers, potatoes. Aldicarb, aldicarb sulfoxide, bufencarb, carboxin, chlorbromuron, diuron, linuron, methiocarb, methomyl, metobromuron, monuron, neburon, oxamyl, propoxur, and thiodicarb were analysed by MS in the positive ion mode. Fenvalerate, folpet, iprodione, and oryzalin were analysed in the negative ion mode. The limits of detection of the pesticides in the crops were in range 0.025-1 ppm.