Abstract
Small quantities of chlorate may be determined in the presence of perchlorate, bromate, iodate, periodate, and many other substances by measurement of the 20·4-μ chlorate absorption band. Quantities of potassium chlorate ranging from about 0·1 to 1·0 mg in 300-mg potassium bromide disks can be determined with errors of about 2%. The disk technique is applicable to aqueous solutions via the freeze-drying process. Cations affect the measured absorbance values, but this problem is easily circumvented by a simple ion-exchange step.
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