A Novel Method for the Spectrophotometric Determination of Thallium Using Methiomeprazine Hydrochloride

Thallium is commonly found with lead, zinc, iron, tellurium and the alkalis . It is normally present only at trace level (¡10 μg L−1) in natural waters. It is toxic and is on several regulatory lists . Determination of trace amounts of thallium is of great importance because of its toxic nature and also because of its increasing industrial applications . The main sources of thallium pollution at present are cement production and fossil fuel combustion. Owing to its increasing use in the semiconductor and electrical engineering industries, leading to increasing emissions into the environment, thallium has acquired growing importance as a pollutant. Both Tl and Tl are biologically active . Recently, Hoffman 5 has reported a case study and a comprehensive literature review on thallium poisoning during pregnancy. Numerous methods have been proposed for the spectrophotometric determination of thallium 6−9, most of which are based on extraction of ion-associates formed by basic dyes and thallium. These methods, however, are time consuming, ∗Corresponding author