Abstract
Methods are described for the determination of chlorine, bromine, and iodine in biological material by neutronactivation analysis. The ultimate limits of detection of the method are approximately 10/sup -8/ g for chlorine, 10/sup -9/ g for bromine, and 10/sup -10/ g for iodine. The three halogens have been determined in seeds of the tomato (Lycopersicum esculentum) and in the nutrient solution on which the plant subsisted. Both bromine and iodine are concentrated relative to chlorine in the seeds, suggesting a physiological need for these elements. The mean values for the three halogens in whole human blood were found to be 2730 mu g/g (Cl; 7 patients), 2.75 mu g/g (Br; 7 patients) and 0.0419 mu g/g (I; 3 patients. The method is particularly recommended for the determination of bromine, since it is more sensitive and less subject to interference by other halogens than are other current methods.
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