SOME OBSERVATIONS ON THE DETERMINATION OF IRON AND COPPER IN BIOLOGICAL MATERIAL BY PHOTOELECTRIC COLORIMETRY

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Abstract
The dipyridyl method of estimating available iron has been modified so that it can be applied directly to coloured extracts of plant tissues. By combining the dipyridyl method for iron with the carbamate method for copper, interference of iron with the copper determination has been eliminated and the simultaneous estimation of iron and copper on the same simple made possible.