Abstract
This study describes a rapid and sensitive spectrophotometric method for the determination of trace amounts of selenium, using starch and iodine as chromogenic reagents. The proposed method is based on the reaction of selenium with potassium iodide in an acidic medium to liberate iodine. This reacts with starch to form a blue colored species with an absorption maximum of 570 nm. Beer’s Law was obeyed in the range of 2–12 µg of selenium. The molar absorptivity and Sandell’s sensitivity were found to be 1.40×104 L mol−1 cm−1 and 5.45×10−3 µg cm−2 respectively. The proposed method was successfully applied to determine selenium in a sample of natural water, polluted water, soil sludge, biological samples and human hair.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call