[Detection of exposure in welders by determining manganese contents of biological materials]

The contents of manganese in the biological materials urine, hair and faeces were measured atom-absorption-spectral-photometrically and compared in non-exposed and exposed welders. Significant differences between the two groups in the manganese-urine-excretions and manganese content of the hair were the result. For the industrial medical control of manganese exposed welders for the prevention of professional diseases the routine determination of manganese in the urine is recommended as exposition test.