How suitable are scalp hair and toenail as biomonitors?

This paper describes the assessment of exposure levels to metals and possible workers' contamination in three galvanizing factories applying the same processes. Concerning the elements determined in air filters, 92.3% of them were also determined in hair and toenail samples: Ag, Al, As, An, Cl, Cr, Cu, Fe, Mn, Na, Sb and Zn. These result point out that hair and toenail reflect the influence of the polluted environment on workers' health and can be useful as bioindicators in epidemiological studies. Instrumental neutron activation analysis was applied to all matrices which confirms its status as one of the most versatile analytical techniques.