Development of a Selective and Sensitive Spectrophotometric Method for the Trace Determination of Thallium(III) Using 3-Methyl-2-benzothiazolinone Hydrazone Hydrochloride and N-(1-naphthyl)-ethylenediamine Dihydrochloride

Abstract

A simple, selective, sensitive, and rapid spectrophotometric method has been developed for the determination of thallium(III) using 3-methyl-2-benzothiazolinone hydrazone hydrochloride and N-(1-naphthyl)-ethylenediamine dihydrochloride. The obtained product had an absorption maximum of 590 nm. Beer's law was valid over the concentration range of 0.158 g/mL. The molar absorptivity and Sandell's sensitivity of the colored system were 2.93 104 L/molcm and 0.00723 g/mL, respectively. The effect of different acids on the sensitivity of the method, interference by foreign substances, the optimum reaction conditions, and other analytical parameters were evaluated. The proposed method has been successfully applied in the analysis of Tl(III) in standard reference materials, synthetic mixtures, and water and urine samples. The performance of the proposed method was evaluated in terms of Student's t-test and variance ratio F-test, which indicated the significance of the proposed method over reported methods.

Optimized production, purification, and radiolabeling of the 203Pb/212Pb theranostic pair for nuclear medicine

“…To further improve recycling yield, the load and wash of the PB resin can be evaporated which results in a Tl recovery of 94.8 ± 1.0% (n = 4). The recovered Tl was confirmed to be in the + 1 oxidation state as TlNO 3 by using a colorimetric method 23 . The recovered TlNO 3 was successfully electroplated, with the resulting targets showing no statistical difference in final target mass, or 203 Pb produced at EOB, compared to non-recycled TlNO 3 or Tl 2 SO 4 .…”

“…The recovered Tl (I) nitrate was then added to a plating bath solution and was used for target plating. The oxidation state and yield of the recovered thallium was determined via colorimetry 23 . Briefly, this method is based on the in-situ generation of a diazonium cation of MBTH by Tl 3+ , which reacts with NEDA to produce a blue-coloured product, whose absorbance at 590 nm is dependent on the concentration of Tl 3+ .…”