Rapid and selective chelatometric titration of aluminium in non-ferrous alloys.
A rapid chelatometric method for the determination of Al (4-20%) in magnesium, copper and chromium-aluminium-iron alloys is proposed. HEDTA is used as titrant and Zn solution as back-titrant, with hydrazidazol as indicator. Mn(II), Cu(II), Cd, Zn, Pb, Co(II), Ni, Hg(II), Fe(III), Bi, Cr(III), Sb(III), Ce(III), La, Sn(IV), Ti(IV), Zr and Mo(VI) do not interfere. High selectivity is achieved by a combination of group separation, masking and interference correction. The coefficient of variation varies from 0.2 to 1%.
Nan
Z
Z
Shanghai Research Institute of Materials, The Ministry of Machine Building Industry, Shanghai, People's Republic of China.
Yuan-Xiang
G
G
Zhi-Ren
L
L
Eei-Yong
C
C