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• W2037650104 abstract "The present article reports on the application of modified multiwalled carbon nanotubes (MMWCNTs) as a new, easily prepared and stable solid sorbent for the preconcentration of trace rhodium ion in aqueous solution. Rhodium ions were complexed with 1-(2-pyridylazo)-2-naphthol (PAN) in the pH range of 3.2–4.7 and then the formed Rh-PAN complex was adsorbed on the oxidized MWCNTs. The adsorbed complex was eluted from MWCNTs sorbent with 5.0 mL of N,N-dimethylformamide (DMF). The rhodium in eluted solution was determined by flame atomic absorption spectrometry (FAAS). Linear range for the determination of rhodium was maintained between 0.16 ng mL−1 and 25.0 μg mL−1 in initial solution. Relative standard deviation for the 10 replicated determination of 4.0 μg mL−1 of rhodium was ±0.97%. Detection limit was 0.010 ng mL−1 in initial solution (3Sbl, n = 10) and preconcentration factor was 120. Sensitivity for 1% absorbance of rhodium (III) was 0.112 μg mL−1. The sorption capacity of oxidized MWCNTs for Rh (III) was 6.6 mg g−1. The effects of the experimental parameters, including the sample pH, flow rates of sample and eluent solution, eluent type, breakthrough volume and interference ions were studied for the preconcentration of Rh3+. The proposed method was successfully applied to the extraction and determination of rhodium in different samples." @default.
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• W2037650104 date "2009-11-15" @default.
• W2037650104 modified "2023-10-10" @default.
• W2037650104 title "Flame atomic absorption spectrometry for the determination of trace amount of rhodium after separation and preconcentration onto modified multiwalled carbon nanotubes as a new solid sorbent" @default.
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• W2037650104 doi "https://doi.org/10.1016/j.talanta.2009.06.049" @default.
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