7 components: Calcium (Ca) 100mg/l Chlorides (Cl-) 50mg/l Sulphur (S) 25mg/l Magnesium (Mg) 10mg/l Sodium (Na) 25mg/l Potassium (K) 5mg/l Carbon (C) 10mg/l in Nitric Acid 5% Hydrofluoric acid 0.1% CRM, ISO 17034 and ISO 17025,,,, Conser 1 * 500 mL