Determination of lithium by potentiometry using fluoride ion selective electrode

Abstract

A potentiometric method was developed for the determination of lithium in ethanol medium using ammonium fluoride as titrant and fluoride ion selective electrode for end point detection. The precision of the measurements for samples containing 1 to 3 mg of Li was found to be better than 0.5%. The developed methodology was then employed for the determination of concentration of lithium (Li) in a complex chemical mixture containing hexamethylenetetramine (HMTA), formaldehyde and ammonium nitrate, which are the wash streams generated in the sol-gel process employed for preparation of Li 2 TiO 3 microspheres. The concentration data profile agreed with the isotopic profile obtained by thermal ionization mass spectrometry.

Sensitive and direct determination of lithium by mixed-mode chromatography and charged aerosol detection

“…Currently, there are various analytical techniques for lithium analysis including flame-AES [10,11], flame-AAS [12], ICP-AES [3,13], ICP-MS [14,15], spectrofluometry [16,17], flow through optode [18] and potentiometry with ion selective electrodes [19]. ICP spectroscopy is widely used for elemental analysis.…”