The diphenyl-thiocarbazone extraction and spectrophotometry were developed for indirect determination of residual chlorine in water distribution system.
It was studied that the process conditions of treating fluobenzene wastewater with acidification, extraction, inorganic fluoride removal and electrocatalysis.
Ingredients: Rose essence oil, ultraviolet radiation absorbefacient, super-tiny pearl powder, natural beautifying and whitening agent, Vitamin C Extraction.
Objective:to study the chemical constituents of the essential oil of Inula helenium L.were extracted by steam distillation(SD)and supercritical-CO2 fluid(SFE).