Mercury in Human Hair: A Study of Residents in Madrid, Spain

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Abstract
The mercury content in hair of the population in Madrid (chosen randomly) was in the range of 1.29–129.47 /μg/g (geometric mean = 7.96 μg/g). The mean mercury content in hair of occupationally exposed workers was 12.70 μg/g (range = 2.91–65.43 μg/g). The highest means, which were found in two families (i.e., 67.89 /μg/g and 92.47 μg/g, Families A and B, respectively), probably resulted from external factors. No statistically significant variations in the mercury concentrations in hair were found with regard to sex, age, or dental fillings. A significant correlation (r = 0.785; P < .01) was found between the concentration of the total mercury found in nursing infants and their mothers.