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

[摘要] 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.

[学科分类] 分析化学

[关键词] ultrasonic assisted dispersive solid phase microextraction;Cerium oxide nanoparticles;Beryllium ion;flame atomic absorption spectrometry