A relatively sharp background
signal was observed early in the atomization stage under
these conditions, causing a slight baseline distortion, which became
more pronounced for higher sample masses. The addition of 0.1%
(v/v)H2O2 to the modifier solution reducedthe backgroundabsorption
significantly and eliminated the associated baseline distortion,
as can be seen in Fig. 1b. In addition, there was a clear increase in
the cadmium absorption signal, both in height and in integrated
absorbance. Gonzalez et al. [36] used a mixture of nitric acid and
hydrogen peroxide in the determination of cobalt, chromium and
nickel in wheat flour samples by SlS-ET AAS as oxidant modifier of
the carbonaceous residues that are retained on the platform due
incomplete destruction of the organic matrix. Cal-Prieto et al. [17]
also encouraged the use of H2O2 to reduce the background and
accumulation of carbonaceous residues of biological materials.