7 components: Fluorides (F-) 5mg/l Chlorites (ClO2-) 5mg/l Chlorides (Cl-) 30mg/l Chlorates (ClO3-) 5mg/l Bromides (Br-) 50mg/l Nitrates (NO3-) 50mg/l Sulphates (SO42-) 150mg/l in Water, CRM, ISO 17034 and ISO 17025 1 * 250 mL