Combined Six Cation Standard-I: contains lithium 50mg/L, sodium 200mg/L, ammonium 400mg/L, potassium 200mg/L, magnesium 2

Combined Six Cation Standard-I: contains lithium 50mg/L, sodium 200mg/L, ammonium 400mg/L, potassium 200mg/L, magnesium 200mg/L and calcium
VE: 1