“…The following elemental isotopes were monitored for analytical determinations: 7 Li, 27 Al, 48 Ti, 51 V, 52 Cr, 55 Mn, 57 Fe, 59 Co, 60 Ni, 63 Cu, 66 Zn, 75 As, 82 Se, 8 8Sr, 111 Cd, 118 Sn, 121 Sb, 137 Ba, 202 Hg, and 208 Pb. The elemental isotopes 45 Sc, 89 Y, 115 In, and 159 Tb were used as internal standards. Limits of detection were calculated as the concentration corresponding to three times the standard deviation of 10 replicate measurements of the blank solution (2% v/v HNO 3 ) and are presented in Table S2.…”