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Spectrophotometric Determination of U(VI) with Rifampicin in Soil Samples
Author(s) -
Sharma Saurabh,
Rahmafisur,
Hejaz Azmi Syed Najmul
Publication year - 2011
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201190068
Subject(s) - chemistry , uranyl , absorbance , molar absorptivity , uranium , detection limit , ion , spectrophotometry , methanol , analytical chemistry (journal) , nuclear chemistry , chromatography , physics , materials science , organic chemistry , optics , metallurgy
A validated spectrophotometric method has been developed for the determination of uranyl ion in soil samples. The method is based on the complexation reaction between uranyl ion and rifampicin in methanol‐water medium at room temperature. The method is followed spectrophotometrically by measuring the absorbance at 375 nm. Under the optimized experimental conditions, Beer's law is obeyed in the concentration range of 1.35–20.25 μg mL ‐1 with apparent molar absorptivity and Sandell's sensitivity of 8.0 × 10 3 L mol ‐1 cm ‐1 and 0.042 μg/cm 2 /0.001 absorbance unit, respectively. The interference of a large number of anions and cations has been investigated and the optimized conditions developed have been utilized for the determination of uranium(VI) in soil samples. The three sigma detection limit (n = 9) for uranyl ion was found to be 0.20 μg mL ‐1 . The proposed method was successfully applied to the determination of uranyl ion in soil samples.