Abstract
Simple and accurate methods are described for the microdetermination of arsenate and arsenite ions using 12- and 14-fold amplification reactions. The arsenate method is based upon reaction with calcium iodate and iodometric titration of the liberated iodate, whereas the arsenite method depends upon reaction with iodine and oxidation of the resulting iodide with bromine. This is followed by iodometric titration of the iodate in addition to the arsenate present in solution. The overall recovery amounts to 99.51 and 99.63% for arsenate and arsenite respectively.
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