Secondary Drinking Water Metals, Matrix per Volume 2% HNO3 per 100mL, Concentration of Element: 100g/mL Copper, 30g/mL Iron, 5 µg/mL Manganese, and 500 g/mL Zinc. Recommended for use in procedures for compliance monitoring of drinking water. Recommended for the analysis of ground and surface water where determination at the drinking water containment levels is required. Supplied in two bottles.