The determination of contents of more than 10 trace elements in scalp hair collected from the juveniles living in the endemic arsenism area of Huhhot

Inner Mongolia （disease area group） ih 1994-1995 by means of instrumental neutron activation analysis （INAA） has been reported. A compariaon of the data from the disease area group with those from the control group

i.e. the juveniles living in Beijing area

has also been made. It ia found that besides the significantly higher hair arsenic content for the disease group than that for the conttol

there are significant differences in contents of some other elements

especially iron and the rare-earth elements such as La ahd Sm. The diffetence in hair elemental eontents between the two groups reflects the difference in environmental and nutritional status of the two areas.