Preparation And Application Of Di-hydroxy Stainless Steel Stirring Rod

In this thesis, Sol-gel method was used to prepare stirring extraction coating material.Tetraethoxy silane and 3-(2,3-epoxypropoxy) propyl trimethoxy silane (KH560) were used as precursors, ethanol as a solvent and hydrochloric acid as a catalyst to prepare sol-gel at room temperature. Then the sol was coated at the surface of magnetic stainless steel wire and then preparation containing epoxy groups of the sol, and then coated onto magnetic stainless steel wire surface, and was then heated to polymerization. The optimum reaction conditions were determined by optimizing the experimental conditions. Rinsing the stirring rod with hexane, ethanol and pure water successively and then opening the epoxy group in aqueous solution.The di-hydroxy stainless steel stirring rod is prepared. Characterizing the stirring rod with electron microscope and the coating material with infrared spectrum.Epoxy group stirring rod without opening loop was used to the extraction of naphthalene in water. By the optimization of such experimental condition as extraction time, stirring speed, desorption time the best conditions are agitation extraction rate 250r/min, stirring extraction time 40min, ultrasonic desorption lOmin and the amount of salt 0.01g/5mL and ultimately determine for stirring extraction speed 250rpm, stirring extraction time 40min by the naphthalene content in the optimal conditions, ultrasonic desorption of 10min, salt content 0.01g/5mL. Under the optimal conditions, the method was studied. The recovery rate of naphthalene was 77%-102%, and the relative standard deviation (RSD) is 4.9%-10%.Di-hydroxy stainless steel stirring rod was utilized to extract phenolic estrogens in water such as diethylstilbestrol, hexestrol and dienoestrol. The optimal conditions that methanol as desorption solvent, ultrasonic desorption 10min, extraction 40min,sodium chloride 0.3g/5mL, stirring speed 300r/min were determined through the optimization of experimental conditions. A methodology study was carried out under the optimal conditions. Recovery experiments of well water and tap water were carried out.The recovery rate is between 57% and 93%. and the RSD is less than 15%.The prepared di-hydroxy stainless steel stirring rod was used to determine I-naphthylamine in water. The optimal conditions that with methanol as desorption solvent, ultrasonic desorption lOmin, extraction 40min. sodium chloride 0.4g/5mL. stirring speed 400r/min by optimizing the experimental conditions. A methodology study was carried out under the optimal conditions. Recovery experiments of well water and tap waterwere carried out.The recovery rate is between 75% and 93%, and the RSD is less than 11%.