Having established the concentration of the KCN according to the procedure set out in 5.1, prepare a standard solution containing 30 ml/l hydrocyanic acid (30 ml HCN [cong ] 72,3 ml KCN).
Bereid, op basis van de overeenkomstig punt 5.1 bepaalde KCN-titer, een ijkoplossing die per liter 30 mg waterstofcyanide bevat (30 mg HCN [cong ] 72,3 mg KCN).