A highly sensitive spectrophotometric determination of sodium 2-sulfanylethanesulfonate in pharmaceutical preparations

Abstract

The aim of this research was to develop a new sensitive and simple spectrophotometric method for the determination of sodium 2 sulfanylethanesulfonate (SSES) with leucocrystal violet. The procedure is based on a redox reaction occurring between the SSES and potassium iodate in an acidic medium. Formed in stoichiometric quantity iodine oxidizes leucocrystal violet to the crystal violet dye, whose coloring is a base of the spectrophotometric measurements. The crystal violet dye formed shows maximum and stable absor bance at pH = 4.1 ± 0.1 and λ = 590 nm. The molar absorptivity, limit of detection and limit of determination of the method were calculated to be 6.98 × 10 4 L/mol cm, 0.10 and 0.13 μg/mL, respectively. The color system obeys Beer's law in the range 0.2-2.0 μg/mL of SSES. The optimum analytical conditions were evaluated. The proposed method has been successfully applied to the determination of SSES in pharmaceutical prepa rations, without the need of any complicated instrumentation. Reliability of determination was confirmed applying standard iodometric method, recommended by European and Polish Pharmacopoeia.

A novel gold-nanocluster-based fluorescent sensor for detection of sodium 2-mercaptoethanesulfonate

“…To address these shortcomings, spectrophotometric methods for the detection of MES were established. [28][29][30][31] Vaishnav et al 28 developed a simple colorimetric sensor based on the aggregation of spherical Ag NPs caused by MES. Ma et al 29 and Sroka et al 30 achieved the quantication of MES by measuring the ultraviolet absorbance of colored substance generated from reaction with MES.…”

“…[28][29][30][31] Vaishnav et al 28 developed a simple colorimetric sensor based on the aggregation of spherical Ag NPs caused by MES. Ma et al 29 and Sroka et al 30 achieved the quantication of MES by measuring the ultraviolet absorbance of colored substance generated from reaction with MES. Vallvey et al 31 developed the chemiluminescence (CL) method for MES detection based on the reaction of the MES with Ce(IV).…”