Abstract
Lanthanum nitrate solutions have been titrated with a standard solution of potassium ferrocyanide at the dropping mercury electrode at a potential of −1.58 V. The two solutions react in the ratio of 1 : 1 with the formation of the compound LaKFe(CN) 6. Amperometric titration of La(NO 3) 3 and K 4Fe(CN) 6 affords a sensitive method for the estimation of lanthanum.
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