Spectrophotometer method for the Detection of Chemical. Oxygen Demand .... for the following elements: Mn, P, Si, Cr, Ni, Mo, Cu, V, Ti, Al,. Pb, Co, Zr, Cb, Nb, Ta, .... Na, Mg, Al, K, Ca V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, As, Se,. Rb, Sr, Y, Zr, ... Nd, Sm, Eu, Tb, Yb, Lu, Hf, Ta, W, Re, Au, Tl, Pb, Bi, Th, U ...
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