Comb.Six Cation Standard-II contains lithium 50 mg/L, sodium 200mg/L, ammonium 250 mg/L, potassium 500 mg/L,

Comb.Six Cation Standard-II contains lithium 50 mg/L, sodium 200mg/L, ammonium 250 mg/L, potassium 500 mg/L,
VE: 1