A new, simple, fast and inexpensive method has been developed for the preconcentration of trace amounts of antimony(III) ions using nickel/nickel boride nanoparticles prior to their determination by hydride generation atomic absorption spectrometry. Optimization of the analytical parameters including initial pH, sorbent amount, contact time, sample volume, eluent type, and interference effects have been performed. Under the optimized conditions, the enrichment factor was 25 and the limit of detection was 0.02 µg/L. Calibration graph was obtained in the range of 0.08-0.80 µg/L with a correlation coefficient of 0.9924. The sorption capacity of the nickel/nickel boride nanoparticles was found to be as high as 2500 mg/g. The proposed method was applied to tap water and bottled drinking water. The quantitative recovery values were obtained in the range of 95-104 %. Langmuir and Freundlich adsorption models were evaluated and the results showed that the sorption process fitted the Langmuir isotherm and monolayer adsorption process occurred. The proposed method was validated with a certified reference material. With the high capacity of the novel nickel/nickel boride nanosorbent, dynamic calibration range with suitable limit of detection and quantification, suitable enrichment factor, rapidity and cost-effectiveness, the proposed method is ideal for the preconcentration and determination of antimony(III).
Primary Language | English |
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Subjects | Chemical Engineering |
Journal Section | Research Article |
Authors | |
Publication Date | March 29, 2020 |
Published in Issue | Year 2020 Volume: 3 Issue: 1 |