Micellar Flow Injection Spectrophotometric Determination of Indium and its Application to the Environmental Samples
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.
Submission of a manuscript to the Journal will be taken to imply that:
- The work is original and has not been previously published (except in the form of an abstract or a part of a published lecture, review or thesis).
- It is not being considered for publication elsewhere, and
- If accepted for publication, it will NOT be published commercially elsewhere in the same form, in any language, without the consent of Editor or Publisher.