Desolvation gas flow was set at 1000 L/h at 600°C for US mode, and at 800 L/h at 600°C for ESI mode, with ion source temperature at 150°C. The capillary voltage was 3.0 kV (Figure 1). Figure 1. Samples were analyzed [...] ............................................ 118-122 Wicka M, Grucza K, Stanczyk D, Drapala A, Konarski P, Wojtkowiak K, Burstein K, Kwiatkowska D: Study of doping substance isomers – the possibility of [...] ................................................. 230-231 Kwiatkowska D, Grucza K, Chajewska K, Konarski P, Wojtkowiak K, Drapala A, Wicka M: Ecdysterone - possible sources of origin in urine.........