170135_inorganicventures_flipping

7:6 Stability of elements at ppb concentra7on levels

Stability study:

A blend of 65 elements from INORGANIC VENTURES / IV LAB’S INC. cat # : CMS-SET was prepared at the 0, 2, 10, and 100 ppb concentraMon level in 1 % (v/v) HNO3 at the start of the study. The set consists of the following: • CMS-1 = 10 μg/mL Ce, Dy, Er, Eu, Gd, Ho, La, Lu, Nd, Pr, Sm, Sc, Tb, Th, Tm, U, Yb, Y in 3.5 % HNO3 • CMS-2 = 10 μg/mL Au, Ir, Pd, Pt, Re, Rh, Ru, and Te in 3.5 % HCl • CMS-3 = 10 μg/mL Ge, Hf, Mo, Nb, Ta, Sn, Ti, W, and Zr in 3.5 % HNO3 tr. HF • CMS-4 = 10 μg/mL Sb, As, Ba, Be, Bi, B, Cd, Ga, In, Pb, Se, Tl, and V in 3.5 % HNO3 • CMS-5 = 10 μg/mL Ag, Al, Ca, Cs, Cr+3, Co, Cu, Fe, Li, Mg, Mn, Ni, K, Rb, Na, Sr, and Zn in 3.5 % HNO3

7:7 Stability of elements at ppb concentration levels

Stability study: (cont.)

§ New blends prepared in the same way were compared to the original prepara5on at 1, 3, 25, 75, 137, 300, and 375 days. § The New blends were compared to the original blend using ICP-MS and the rela5ve % loss was calculated. § Only LDPE boLles (500 mL) were used. § The LDPE boLles were acid leached with 1% nitric acid for 59 hours at 60 0C. § The ICP-MS used is in a clean room limi5ng environmental contamina5on. § Measurements of each blend were made in the same LDPE boLle.