Application of Cloud Point Method for Spectrophotometric Determination of Salbutamol Sulphate and Methyldopa

Abstract

A simple and efficient cloud point spectrophotometric method has been used for the determination of salbutamol sulphate andmethyldopa both in pure and pharmaceutical preparations.The procedurewas based on the ion association formation with eosin Y. The extraction of ion association, drown to Triton X-114 micelles,wasmeasured spectrophotometrically. The phase separationwas studied and optimized.Beer's law was rectilinear over the concentration ranges of 0.1-20 and 0.3-10 μg/mLwithmolar absorptivity 4x10⁴ and 5.7x10⁴ L.mol^-1 cm^-1 and average recovery 98.21% and 101.27% for the above drugs, respectively. The method was applied successfully for the determination of salbutamol sulphate and methyldopa in pharmaceuticals