Investigation on the interaction between dihydroxybenzene and Fe3+- H2O2-Rh6G system based on enhancing chemiluminescence.
A highly sensitive flow-injection chemiluminescence (FI-CL) method has been developed for the determination of dihydroxybenzene, based on the hydroxyl radical reaction. Hydroxyl radical (.OH) produced by the reaction of Fe(3+) and H(2)O(2) oxidize rhodamine 6G to produce weak CL. It was observed that catechol and hydroquinone greatly enhanced the weak CL reaction. However, the proposed CL system is not suitable for determination of resorcinol because the enhancement reaction is very slow. The proposed procedure has a linear range of 0.01-2 mg/L for catechol, with a detection limit of 0.006 mg/L, and 0.008-1 mg/L for hydroquinone, with a detection limit of 0.004 mg/L. The possible mechanism of the CL system is discussed.
He
Deyong
D
Institute of Analytical Science, The Key Laboratory of Analytical Chemistry of Chongqing, Southwest Normal University, Beibei, Chongqing 400715, People's Republic of China.
Zhang
Zhujun
Z
He
Chao
C
D002396:Catechols / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D049449:Luminescence
D002396:Catechols; D005290:Ferric Compounds; D006861:Hydrogen Peroxide; C034221:catechol