[Mercury concentrations in blood and urine in persons with and without amalgam fillings]

Using flameless atom-absorption spectroscopy, the mercury concentration in the urine and in the blood of 102 persons was determined in a double-blind experiment. The subjects were divided into four groups: persons with and without amalgam fillings as well as persons with and without occupational contact with mercury and amalgam. Mercury concentrations in the blood and the urine were the same in relation to the presence or absence of amalgam fillings. The individual values varied, depending on the nutrition, and did not correlate with the number of amalgam fillings present in the individual case. Persons with occupational contact with mercury and amalgam excreted slightly more mercury in the urine. Even these values however were far below the upper limits of the range of normalcy.