M. Ue et al., High sensitive detection of impurities in nonaqueous electrolyte solutionsby a rotating disk electrode, ELECTROCH, 69(6), 2001, pp. 458-461
A rotating disk electrode technique was applied to the detection of the kno
wn impurities in a nonaqueous electrolyte solution used for electrochemical
capacitors. Propylene glycol and fluoride ion, which are both hydrolysis p
roducts of the nonaqueous electrolyte solution composed of propylene carbon
ate solvent and triethylmethylammonium tetrafluoroborate salt, were quantit
atively detected by a glassy carbon based rotating disk electrode in the co
ncentration range of 10 to 100 ppm, where normal linear sweep voltammetry c
annot be applied.