Platinum concentrations in sera of catalyst production workers are not predictive of platinum salt allergy.

Platinum (Pt) salts are potent occupational allergens in precious metal refineries and catalyst productions. The threshold limit value of 2000 ng soluble Pt/m3 enforced in many countries has been questioned because there is still a high incidence of Pt salt allergy. The objective of the present case series is to define the predictive value of biological monitoring by relating Pt in the serum of catalyst production workers and control subjects to sensitization to Pt salts as assessed by skin prick testing.