Analysis And Removing By Electrochemical Method Of Trace Ions In Tetrabutyl Ammonium Bromide

Analysis of trace ions in tetrabutyl ammonium bromide (TBAB) by ion chromatography and removing trace ions by electrochemical method was studied.Firstly, a novel pretreatment was set up to remove the TBA+in TBAB. D155, a weak acid resin, has both good adsorption of Na+and TBA+and good desorption of Na+but bad desorption of TBA+. After the pretreatment with D155, the concentration of Na+is about130μg/kg in TBAB with a concentration about0.54mol/L. The method has a good precision and the recovery of Na+is between97.96%and99.11%.The method of electrochemical method with two membranes was used to remove the Na+in TBAB. The membrane of CF was used to purify TBAB. The research results show that high current density has good effect of sodium removal. Removal rate of Na+is29%at100A/m2. Removal rate of sodium will reach38.4%when the concentration of TBAB is1.6mol/L.The trace ions in the samples were tested by ion chromatography. The precision of this analysis method is high and its linear correlation is good.