2.2.2. AAS Apparatus
Measurements were carried out using a Perkin-Elmer
Precisely AA800 atomic absorption spectrometer with an
HGA 400 air-acetylene flame and graphite furnace at-
omiser, AS-93 plus autosampler, deuterium background
correction and equipped with WinLab 32™ for AA Ver-
sion 6.5 software, which features all the tools needed to
analyze samples. Hollow cathode lamps were used as
radiation sources for Sn, Cu and Zn determinations. Sn
was analyzed on a nitrous oxide-acetylene flame and Cu
and Zn were analyzed on an air-acetylene flame. The
main resonance line at 286.3 nm for Sn, 324.8 nm for Cu
and 213.9 nm for Zn were used for all determinations,
with a spectral bandwidth of 0.7 nm for Sn, Cu and