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Concentrations of arsenic measured in serum, whole blood, and clotted erythrocyte fraction of Sprague Dawley rats at varying doses of sodium arsenite exposure by oral gavage. Concentrations of arsenic in serum were found to be orders of magnitude lower (~200 μg/L) compared to whole blood and clotted erythrocyte fraction suggesting the overwhelming majority of arsenic in whole blood is partitioned to erythrocytes. Error bars represent ±1 SD of triplicate analytical measurements.
