Cation Multi-Element IC Standard Solution, 5 cations (NH4+, Ca2+, K+, Mg2+Cation Multi element standard (IC), ROTIStar 5 cations, concentration in mg l, (NH4+ (100), Ca2+ (200), K+ (100), Mg2+ (100), Na+ (400)) in water, Density (D) ~1 g cm, Boiling point (bp) 100 C The standard solution is certified and can be traced to NIST standard reference solutions. The solution is produced according to ISO 17034 in an accredited environment, tested in a laboratory accredited to ISO IEC 17025 and supplied with a detailed, batch