Elements in Indoor Environments

The characterization of elements and their compounds in the indoor environment is a 

Most indoor studies report metal concentrations in vacuum dust samples using mass concentration units (jug g Table 11.1). In studies aimed at estimating residential exposures, settled dust samples typically are col- 

Particle/sieve size Pb range (geo. mean) Cd range (geo. mean) Cu range (geo. mean) Zn range (geo. mean) 

Summary data (Table 11.1) suggest that worldwide geometric mean concentrations of Pb in house dust generally vary between 80 and 1007 ig g while Cd concentrations fall within a tighter range (4.2 to 7.7 Jg g ), as do Cu concentrations (121 to 311 jg g ). An exception is the German survey by Sei- 

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