Metabolism of Methyl Mercury (²⁰³Hg) Compounds in Man

Abstract

The oral intake of 2.6μCi of methyl-mercuric nitrate Hg 203 by three clinically healthy, white, male volunteers aged 37 to 44 years resulted in an accumulation in the liver and the head of the ²⁰³Hg. The main excretory route was the feces but the urinary excretion increased with time up to 30 days after the intake. The biological half-life was found with whole body measurements to be 70 to 74 days. The decline of ²⁰³Hg in the head was less rapid than in the rest of the body. No ²⁰³Hg was found in the sperm. A very rapid uptake was found in the erythrocytes. The main activity was localized in the liver (about 50% of the contents of the body) whereas the head contained about 10% of the total body content. After infinite time a weekly unit dose of methyl mercuric nitrate Hg 203 will result in a whole body burden of 15.2 units mercury.