Quantitative Determination of Aquo Ammono Sulfuric Acids by Paper Chromatography

Abstract

A procedure for quantitative separation of aquo ammono sulfuric acids by paper chromato-graphy was described. The paper chromatography was accomplished by ascending technique with a solvent mixture, dioxane-water-conc. aqueous ammonia(68.5: 31.4: 1), reported by Lehmann and Kempe. The chromatograms of aquo ammono sulfuric acid mixtures were developed and visualized with bromophenol blue spray reagent(yellow color of the components was appeared clearly in blue ground on standing overnight).For the quantitative determination, the yellow bands due to NH4-salts of aquo ammono sulfuric acid and selfaryl diamide zone in the chromatograms were cut off, and the componeat were extaracted with water. The sulfur in each separatedsubstance was conveted into SO42-/by the nitrous acid decomposition method and determined by turbidimetry.Pure aquo ammono sulfuric acids mixtures and reaction products containing aquo ammono sulfuric acids such as thermal oligomerization product of sulfaryl diamide, reaction product between SO2-Cl2gaseous mixture or SO2Cl2 and NH3, and reaction product between NH3and SO3 were analyzed by the present chromatographic procedure.The results demonstrate that the method gives reproducible results, and reliable for the quantitative analysis.A simultaneous extraction device(Fig.1)was also described.