170135_inorganicventures_flipping

7:9 Stability of elements at ppb concentra8on levels

Stability study: (results )

§ Hg was not stable long enough to measure (minutes). § Au was the next most unstable element showing instability at the 2, 20, and 100 ppb levels at 3 days.

§ Ag showed instability only at the 10 and 100 ppb levels at 137 days. § Pd showed instability only at the 2 and 10 ppb levels at 3 days.

7:10 Stability of elements at ppb concentration levels

Stability study: (results)

§ Pt and Ta showed instability only at the 2 and 10 ppb levels at 137 days. § Ir showed instability only at the 2 ppb level at 300 days. § Mo , Sn , and Hf showed instability only at the 2 ppb level at 375 days.

§ All other elements showed no instability at 375 days which includes: Ce, Dy, Er, Eu, Gd, Ho, La, Lu, Nd, Pr, Sm, Sc, Tb, Th, Tm, U, Yb, Y, Re, Rh, Ru, Te, Ge, Nb, Ti, W, Zr, Sb, As, Ba, Be, Bi, B, Cd, Ga, In, Pb, Se, Tl, V, Al, Ca, Cs, Cr+3, Co, Cu, Fe, Li, Mg, Mn, Ni, K, Rb, Na, Sr, and Zn.