6 components: Lithium (Li+) 50mg/l ; Sodium (Na+) 200mg/l ;Ammonium (NH4+) 250mg/l ; Potassium (K+) 500mg/l ; Calcium (Ca 2+) 500mg/l ; Magnesium (Mg 2+)250mg/l in Water (pH 3.0 ± 0.3, acidified with HCl acid), 50mL