Serum and urine monitoring of fluoride exposed workers in aluminium smelting factory

To define the relationship between F concentrations in the serum and urine of workers and the amount of gaseous F in the workplace, postshift serum and urine samples of exposed and unexposed workers of an aluminium smelting factory were examined.Average gaseous F concentration in each work environment was 1. 89 mg/m3to 4. 82 mg/m3.Although serum F concentrations in unexposed workers increased with age, those in F exposed workers did not change, and the levels of F in serum and urine of them were more than twice as high as those in the controls. The serum and urinary F of exposed workers were well correlated (r= 0. 66 ) with each other.