Rk. Rastogi et al., DETERMINATION OF FLUORIDE BY SPECTROPHOTOMETRY OF ARSENAZO(III) COMPLEX OF THE BACK-EXTRACTED TH(IV), Journal of radioanalytical and nuclear chemistry, 188(4), 1994, pp. 291-298
A method based on the back-extraction of Th(IV) from its TTA complex i
n benzene by aqueous F- followed by spectrophotometric measurement of
Th(IV), for the determination of fluoride has been developed. The coef
ficients of variation obtained are 2.4% and 1.4% in 11 determinations
at F- concentration levels of 1.0 mug ml-1, respectively.