Many countries worldwide are increasing awareness of environmental
problems and seeking the way to decrease environmental
pollutions. In particular, the contamination of heavy metals in
environment is one of the serious problems because even low contents
of heavy metal can cause harmful effects to plants, animals
and human. Among heavy metals, lead is a common toxic pollutant
in the environment as a result of its use in storage batteries,
cable sheath, gasoline antiknock products and paint pigments. The
widespread uses cause environmental and health problems such
as the cumulative poison and the retention of lead in the body for
long periods [1].
The majority of lead determinations at the ppm–ppb levels are
usually performed by using atomic absorption spectrometry (AAS).
However, the detection limit of the instrument is not suitable with
the presence of lead in environmental samples. Thus, the preconcentration
step followed by spectrometric determinations and flow
injection spectrometric methods have been employed [2–6]. Thus,