Estimation of Sulphur by Messenger Method Index.

Abstract

The quantitative estimation of sulphur in organic compounds is an important aspect of elemental analysis in organic chemistry. The Messenger method is a classical and reliable analytical technique used for the determination of sulphur content. In this method, the organic compound is heated with fuming nitric acid in the presence of potassium chlorate, leading to the oxidation of sulphur into sulphate ions. The formed sulphate is then precipitated as barium sulphate using barium chloride solution, which is subsequently filtered, dried, and weighed. The amount of sulphur present in the sample is calculated gravimetrically from the mass of barium sulphate obtained.
This study focuses on the principles, procedure, and accuracy of the Messenger method in sulphur estimation. The method is advantageous due to its simplicity, reproducibility, and applicability to a wide range of organic compounds. However, careful control of experimental conditions is necessary to avoid errors caused by incomplete oxidation or loss of precipitate. The results demonstrate that the Messenger method provides reliable and precise estimation of sulphur when performed under controlled laboratory conditions.