Browsing by Author "Ambacha Fufa"

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    Temachwroferrate(III) - Selective Liquid Membhane Electrode Based on Crystal Violet - Studies and Applications.
    (1989-06) Ambacha Fufa; Chandravanshi B.S. (PhD)
    A 7xW-4 M Crystal Violet tetrachloroferrate(III) extract in nitrobenzene has been used to construct tetrachlol~}ferrate(III)-selective liquid IllEITbrane electrode with a PVC support. The electrode body was made fran too concentric Pyrex glass tubes (lengths 120 mn and internal diameters 6 & 12mn) with a 11/23 {ITound glass joint at a canron end and narrower tips at other ends. The experimental conditions have been established to determine 2.5xlU.- 5 -5x10- 2 M iron(I1I), as tetrachloroferrate( III) and were found to be 4.0-5.5 M in total chloride and 0.75-1.5 M in HCI with slope of 56.0 mV decade-1 and a detection limit of 7.9x1l'-6 M iron(III). Selectivity studies with 30 anions and cations have been made to screen the species which may interfere with iron determination. The electro:\e has been used reliably to measure iron in mineralized and vitaminized syrup, haematite, htUnan blood, and standard Sarr[)les with direct standard addition, samDle addition and standard subtraction notentiOOl0tric techniques. EDTA titrations have also shown the feasibility of titration with the proposed electrode do\yn to 1x10-4 M iron( III).