Spectrophotometric Determination of Trace Amounts of Scandium with Molybdate, Nile Blue, and Poly(vinyl alcohol)

Abstract

A sensitive method for the determination of trace amounts of scandium by spectrophotometry is described, based on the formation of the ion associate between scandium(III), molybdate and Nile Blue in the presence of poly(vinyl alcohol). The molar absorptivity at 585 nm is 3.59X105 dm3 mol -' cm -'. Beer's law is obeyed over the range 0 -2.0 µg scandium per 25 ml. Optimal conditions for the determination and the interferences from foreign ions are reported.Ten-fold amounts of rare earth elements do not interfere with the determination of scandium, except cerium. The proposed method has been applied successfully for the spectrophotometric determination of scandium in some geological samples.

Photoexcitation of Nile Blue Dye in Aqueous Solution: Td-DFT Study

“…NB сhromophore is a part of sensors [44][45][46][47]. The change in the optical characteristics of the NB upon its binding with inorganic compounds is used to detect their traces [48][49][50][51][52]. The NB is also used for optical analysis of the content of anionic surfactants in a sample [53].…”

Untitled

“…NB сhromophore is a part of sensors [44][45][46][47]. The change in the optical characteristics of the NB upon its binding with inorganic compounds is used to detect their traces [48][49][50][51][52]. The NB is also used for optical analysis of the content of anionic surfactants in a sample [53].…”