Page 94 - Pharmaceutical Analytical Chemistry III

 * DETERMINATION :

 "Aluminone reagent" :

 Aluminium reacts with ammonium salt of
aurintricarboxylic acid "Aluminon, to form a
red lake.

HO HO

H4NOOC H4NOOC

C O H4NOOC CO
HO Al3
H4NOOC ONH4 + Al3+
HO O
O O

Red lake