Table 2

Transition metal content of CB and UfCB particles leached into saline or citrate buffer

Final concentration (ng transition metal/mg particles)
FeCuCrNiCoZn
Elemental analysis of particles:
 CB SalineND80ND85ND35
 CB Citrate50185ND35ND30
 UfCB SalineND55ND105ND90
 UfCB Citrate1003040210ND25