A simple, sensitive and direct procedure for the determination of
Sn in whole blood and urine was developed. Just a dilution step
with Triton X100 was necessary as sample pre-treatment as well as
the use of a Pd/Mg solution as modifier. Multiplicative matrix effects
were observed, impairing the use of aqueous calibration solutions.
However, the similarity of the analyte addition curves slopes of a series
of samples supported the use of matrix matched calibration solutions,
and, in this way, following the optimized temperature program, an
agreement statistically significant was observed between experimental
and reference values in the analysis of reference materials Also, limits of
detection obtained showed that the methodology can be used for the