A procedure for trapping tetraalkyl-lead (TAL) compounds in air is des
cribed. The system consists of a solid cartridge containing a mixture
(65:35, w/w) in series of Porapak and Tenax. A contaminated atmosphere
with a known concentration of TAL was generated in the laboratory. Th
is atmosphere was trapped in the solid cartridge. After passing synthe
tic air through the system, the cartridge was extracted with hexane in
an ultrasonic bath. The organic extract was concentrated under nitrog
en current and the compounds were analyzed by GC-MS-SIM.Each step of t
he process was studied independently. Losses of volatile compounds in
the evaporation step, the storage of the cartridge over 45 days before
the extraction step and the breakthrough volumes have been establishe
d in order to achieve optimization of the whole process. The analytica
l conditions of the final quantification include a linear range betwee
n 1.32 pg and 50.10 ng for Et(4)Pb, and 5.30 pg and 51.40 ng for Me(4)
Pb. The detection limits are 0.66 pg, 3.40 pg, 1.07 pg, 1.05 pg and 2.
60 pg for Et(4)Pb, Et(3)MePb, Et(2)Me(2)Pb, EtMe(3)Pb and Me(4)Pb, res
pectively.