“…(Hao & March, 2001b), but also by the redox reactions which the solvent undergoes at the capillary of the spray (Gatlin, Turecek, & Vaisar, 1994;Wang & Agnes, 1999a,b). Redox reactions may be experienced also by redox-active ligands as N,N-diethyldithiocarbamate and glutathione (Ross, Ikonomou, & Orians, 2000b), and by metal ions as Cu(II) (Xu, Zhang, & Yergey, 1996;Ross et al, 1998;Bartoszek et al, 1999;Lavanant, Hecquet, & Hoppilliard, 1999;Shen & Brodbelt, 1999;Ross, Ikonomou, & Orians, 2000a;Gianelli et al, 2001;Woodcock et al, 2001;Schroder, Weiske, & Schwarz, 2002;Cerchiaro et al, 2004;Lyapchenko et al, 2004;Franski, 2004a), Fe(III) (Mollah et al, 2000;Ross, Ikonomou, & Orians, 2000a;Neubert, Hider, & Cowan, 2002), Cr(VI) (Sahureka, Burns, & von Nagy Felsobuki, 2002), In(III) (Vasca et al, 2003), Co(III) (Ralph et al, 1996b), Ni(II) (Olesik, Thaxton, & Olesik, 1997), Eu(III) and U(IV) (Stewart & Horlick, 1996). Redox reactions may occur also in other parts of the ES chamber and not only at the capillary tip (Gianelli et al, 2001).…”