In order to control the quality of trimethyl-lead determination in urban du
st, the Standards, Measurements and Testing Programme (formerly BCR) of the
European Commission organized interlaboratory studies of which the final a
im was to certify a Reference Material. This paper describes the preparatio
n of an urban dust reference material (CRM 605), the homogeneity and stabil
ity studies, and the analytical work performed for the certification of the
trimethyl-lead content (7.9 +/- 1.2 mu g kg(-1) by mass). Copyright (C) 19
99 John Wiley & Sons, Ltd.