摘要：As one of fundamental experimental conditions in the activation analysis of human hair, examination was made on changes in the concentration of trace elments by washing hair samples. External contamination of hair samples was easily removed by washing with organic solvents but some amount manganese and sodium was washed out by this treatment. Easily water-soluble elements were removed by washing with a detergent or deionized water. Use of city water instead of deionized water resulted in absorption of zinc into hair samples. Washing of hair samples with organic solvents was adopted for examination of trace elments in human hair, because the washing procedure is easy, washing experiments can be repeated with minimum of error, and easily water-soluble components are useful for individualization of human hair.
