Sequential titration of iron(II), antimony(III) and arsenic(III) in binary or ternary mixture.
A simple titrimetric procedure for the determination of iron(II), antimony(III) and arsenic-(III) in a mixture, with cerium(IV) sulphate as titrant, is proposed. The end-points can all be detected with ferroin or potentiometrically. Phosphoric acid medium is used for titration of the iron(II), then acetic acid medium for the titration of antimony(III), and finally the arsenic(III) is titrated in presence of iodine as catalyst. The procedure utilizes a single portion of test solution; it can be adopted for the analysis of binary mixtures.
Sriramam
K
K
Department of Chemistry, Nagarjuna University, Nagarjunanagar, 522 510 (A.P.), India.
Sarma
B S
BS
Sastry
N R
NR
Prasad
A R
AR