Abstract
Simple titrimetric methods have been described for determination of aluminium and fluorine after selective separation of aluminium from fluorine using TBP-plasticized polyurethane foam sorbents. The extraction of aluminium from 0.20 to 0.30M NaOH solution has been found to be quantitative at 25°C. The sorbed aluminium complex can be eluted with 1M HC1 and determined titrimetrically at pH ∼ 5.3 with EDTA by the back titration method using xylenol orange as indicator. Fluorine left in the aqueous part has been determined titrimetrically with standard thorium nitrate solution in presence of 40% acetone at pH 3.0 ± 0.2 using sodium alizarin sulphonate as indicator. Anions like—PO43-, SiO32-, AsO32-, VO3−, CrO42-, BO33-, MnO42-, MnO4− and GaO2−″ have no effect on the extraction of aluminium as well as on the determination of fluorine. Both the methods have been standardised against standard samples.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
