CHROMABOND QuEChERS Mix I, citrate extraction mix KIT, consisting of:, - 4000 mg MgSO4, - 1000 mg NaCl, - 500 mg Na2H citrate x 1.5 H2O, - 1000 mg Na3 citrate x 2 H2O, individually weighed and filled into aluminium packets, incl. 50 empty 50 mL centr 1 * 6,5 g