Masti Saraswati P, Seetharamappa Jaldappa, Melwanki Mahaveer B
Department of Chemistry, Karnatak University, Dharwad-580 003, India.
Anal Sci. 2002 Aug;18(8):913-5. doi: 10.2116/analsci.18.913.
Ethopropazine hydrochloride (EPH) has been proposed as a sensitive reagent for the spectrophotometric determination of tungsten(VI). The method is based on the formation of a chloroform-soluble yellow-colored ternary complex by the interaction of EPH and thiocyanate with tungsten(V). The complex exhibits the absorption maximum at 404 nm with Sandell's sensitivity value of 20.03 ng cm-2. The complex obeyed Beer's law in the concentration range of 1-15 micrograms ml-1 with an optimum concentration range of 2.3-12.9 micrograms ml-1. The effects of foreign ions in the determination of tungsten(VI) were investigated. The method has also been successfully applied to the analysis of alloy steels.
