[Determination of trace iron by catalytic spectrophotometry with nile blue].
A new method is developed for the determination of trace iron, which is used to catalyze the discoloring reaction of KBrO3 oxidizing nile blue in acid medium in the presence of NTA. The kinetics is studied. The method has high sensitivity and the range of determination is 0-0.4 microgram/25 mL for iron. The detection limit of the method is 4.73 x 10(-10) g/mL. Satisfactory results are obtained for the determination of trace iron in food and water.
Luo
Chuannan
C
Department of Applied Chemistry, Shandong Building Industry Institute, Jinan 250022, China.
Zhou
Changli
C
Wei
Qin
Q
Yan
Yonghong
Y
D002384:Catalysis; D005456:Fluorescent Dyes; D007501:Iron / Q000032:analysis*; D010078:Oxazines; D013053:Spectrophotometry / Q000379:methods*
D005456:Fluorescent Dyes; D010078:Oxazines; C008619:Nile Blue; D007501:Iron