RASIO ASAM NITRAT DAN SULFAT DALAM ANALISIS LOGAM KADMIUM, TEMBAGA, BESI, DAN TIMBAL PADA LIMBAH CAIR MENGGUNAKAN ICPE

Efficiency of chemical uses in the analysis process is necessary and thus needs to be developed. In this study, we investigated nitric and sulfuric acid ratio (v/v) used in wet digestion process to analyze Cd, Cu, Fe and Pb metals in waste water. The research found that the best analytical results were obtained when 1.5 mL nitric acid and 0.5 mL sulfuric acid were used for digesting Cd, Cu, and Pb metals, or 2.0 mL nitric acid for Fe. With this protocol, total acid that can be saved is 8 mL per sample and liquid waste is reduced by 40 mL per sample. Keywords: Wet digestion, Metal Analysis, Plasma Emission Spectroscopy