Spectrophotornetric determination of beryllium with Pontacyl Violet 4BSN

Abstract

A new method for the spectrophotometric determination of beryllium was studied, using Pontacyl Violet 4BSN (Color index 16580) as a reagent. Berylliumreacted with the reagent at pH 6.57.4 to form a colored complex having an absorption maximum at 620 mμ, which can be used for the determination of beryllium. Beer's law was followed up to 0.3 ppm of beryllium and the molar extinction coefficient was 24, 600 at 620 mμ in 10% (v/v) acetone solution. Aluminum, iron(III), copper(II), chromium(III), scandium and phosphate interfered with the determination of beryllium. The addition of 10% of acetone increased the sensitivity of the reagent on beryllium, and it reduced the interfering effects of aluminum, scandium, iron(III) and nickel when determining beryllium.