THE EFFECT OF DIFFERENT MINERAL ACIDS ON EMISSION INTENSITY IN ICP SPECTROCHEMISTRY

HNO3, HCl, H2SO4, HClO4, and H3PO4 were investigated for their effects on the emission intensities of some transition and rare earth elements. The mixture solutions of Co, Cu, La, Mo, V, Y, and Zn were prepared with these acids and determined by ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectrometry). The acids of HNO3, HCl, and HClO4 have showed similar effect on the emission intensities. The extent of signal suppressions were large in H2SO4 compared with the other acids. The relative standard deviations range from 0.03 to 5.40%. Recoveries of Co, Cu, La, Mo, Y, V, and Zn were in the range of 97.0-105.1%, 93.0-101.2%, 95.5-110.3%, 76.2-96.8%, and 96.8-134.5% for HNO3, HCl, HClO4, H2SO4, and H3PO4 respectively.