Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
582698 | Journal of Hazardous Materials | 2009 | 5 Pages |
Abstract
A new, simple and highly selective method for spectrophotometric determination of selenium in waste water samples is described. Selenium(IV) oxidizes Iâ ions into I2 which subsequently reacts with excess of Iâ ion in the acidic media to give tri-iodide ions (I3â), and it further reacts with cetylpyridinium cation (CP+) to give a violet colored species. The value of molar absorptivity of the ion-associate species in terms of selenium is 1.80 Ã 104 L molâ1 cmâ1 at λmax 510 nm. The detection limit of the method is 10 ng mLâ1 Se. The calibration curve is linear over 50-1000 ng mLâ1 Se with slope, intercept and co-relation coefficient of 0.23, â4.0 Ã 10â4 and +0.99, respectively. None of the tested diverse ions interfered in the present method. The method has been tested for the determination of selenium in waste water samples.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Health and Safety
Authors
Kavita Agrawal, Khageshwar Singh Patel, Kamlesh Shrivas,