A Novel Ultrasonic Assisted Dispersive Solid Phase Microextraction for Preconcentration of Beryllium Ion in Real Samples Using CeO2 Nanoparticles and its Determination by Flame Atomic Absorption Spectrometry

Abstract

A simple and highly sensitive dispersive solid phase microextraction method coupled
with flame atomic absorption spectrometry is proposed for preconcentration and
determination of beryllium in real water and alloy samples employing cerium oxide
nanoparticles as novel DSPME sorbent. This sorbent showed to be very effective for
extraction of Be ion at the presence of interfering ions. Different parameters affecting
the microextraction procedure such as nanoparticles amounts, pH, stirring and
centrifuging times and the type and amount of desorption solvent were thoroughly
studied and optimized. Under the optimized conditions, the calibration curve for Be
was linear in the range of 0.05-25 µg L-1 with a correlation coefficient of 0.99. This
method also shows low the relative standard deviation (RSD) and high
preconcentration factor for determination of Be ion in real samples. The effects of
different interfering ions on the Be determination were investigated and the method
was successfully employed for its determination in well, tap and river water samples,
and an alloy. The accuracy of method was also evaluated using a standard reference
material.