EN
This paper describes, a new, sensitive, and low cost solid-phase extraction
(SPE) method using a poly(N-phenylethanolamine) /multi-walled carbon
nanotubes (MWCNTs) nanocomposite for extraction, pre-concentration,
and flame atomic absorption spectrometric (FAAS) determination of trace
level palladium in distilled water, tap water, Caspian sea water, Persian
Gulf water, spring water, lake water and soil samples, as well as real
samples. The poly(N-phenylethanolamine)/MWCNTs nanocomposite
were characterized using Fourier Transform-infrared (FT-IR) spectroscopy,
thermo-gravimetric analysis (TGA) and scanning electron microscopy
(SEM). Factors affecting the pre-concentration of palladium, including
sample pH, flow rate, and type and volume of eluent, were investigated.
The effect of interfering ions and break through volume on the separation
and determination of palladium ions was also determined. The maximum
sorbent capacity of the poly (N-phenylethanolamine)/MWCNTs
nanocomposite was calculated to be 101.5 mg g−1. The pre-concentration
factor, relative standard deviation, and limit of detection of the method
were found to be 150, 2.8% (n=10), and 0.09 ng mL−1, respectively. The
presented method was compared to certified reference materials, and
finally, the presented technique was applied to different matrices spiked
with 5 ng mL−1 of analyte.