Abstract
A selective and fairly sensitive automatic spectrophotometric method for the determination of indium by flow injection analysis (FIA) has been developed. Anionic micellar medium of sodium dodecyl sulfate has been used for the system Indium reacts with 1,5-diphenylthiocarbazone (dithizone) at pH 7.00 in micellar medium, to give red-violet chelate, which absorb at 530 nm. The molar absorpitivity and Sandell’s sensitivity were found to be 6.7103 l mol-1 cm-1 and 20 ng cm2of indium, respectively. Linear calibration graph was obtained for 0.25 to 6.0 g ml-1 of indium. The reaction is instantaneous and absorbance remain stable for 45 h. Various analytical parameters, such as effect of pH, flow rate, sample volume, dispersion coefficient, time and reagent concentration were studied. The interference of over 40 anions, cations and complexing agents has been studied at 1 g ml-1. Method has been applied to determine indium in synthetic mixture and water samples.
NAJMA MEMON, ISSN-1680-9955Pak. J. Anal. Chem. Vol. 6, No. 1, (2005)16 –21 Micellar Flow Injection Spectrophotometric Determination ofIndium and its Application to the Environmental SamplesNAJMA MEMON1, , M. J. AHMED, M. I. BHANGER. (2005) Micellar Flow Injection Spectrophotometric Determination of Indium and its Application to the Environmental Samples, Pakistan Journal of Analytical & Environmental Chemistry, Volume 6, Issue 1.
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