TABLE II

Instrument Parameters; ICP-MS

ICP-MSAgilent (Santa Clara, CA) 7500A
Forward Power1300 watts
Integration Time0.1 s per point
Rinse Time180 s
Rinse Rate0.5 rps
Uptake Time45 s
Uptake Rate0.5 rps
Stabilization Time20 s
Analysis Pump Rate0.1 rps
All Other SettingsDetermined by Tune
Elements ScannedLi, Be, B, Na, Mg, Al, Si, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, As, Se, Br, Rb, Sr, Y, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Cd, In, Sn, Sb, Te, I, Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg, Tl, Pb, Bi, Th, and U