... and Analysis for MetalsThe ICP discharge is very intense, brilliant white, and teardrop-shaped. Figures 12. 1 and 12. 2illustrate the ICP zones and plasma temperature regions, respectively. 12. 2.3.1 ... standard solution I: Be, Cd, Mn, Pb, Se, and ZnMixed standard solution II: Ba, Co, Cu, Fe, and VMixed standard solution III: As, Mo, and SiMixed standard solution IV: Al, Ca, Cr, K, Na, and ... calibration standard and recalibrate the instrument. If this does not correctthe problem, prepare a new stock solution and a new calibration standard and repeat cali-bration. 12. 6.6 METHOD...