Determination of Alizarin Red S using a novel B-Z oscillation system catalyzed by a tetraazamacrocyclic complex |
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| Authors: | Gang Hu Lulu Chen Jinfeng Zhang Panpan Chen Wei Wang Jimei Song Lingguang Qiu Juan Song Lin Hu |
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| Affiliation: | (1) Department of Chemistry, Anhui University, Hefei, 230039, P. R. China;(2) Institute of Applied Chemistry, East China Jiaotong University, Nanchang, 330013, P. R. China |
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| Abstract: | A new and convenient method for the determination of Alizarin Red S by the perturbations caused by different amounts of Alizarin Red S on a novel B-Z oscillating system is proposed. This new type Belousov-Zhabotinskii involves a macrocyclic copper(II) complex [CuL](ClO4)2 as catalyst and malic acid as the substrate. The ligand L in the complex is 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradeca-4,11-diene. It is found that the relationship between the change in the oscillation amplitude and the logarithm of the Alizarin Red S concentration in the range of 1.5 × 10−7 to 1 × 10−3 M fits a polynomial model: ΔA = 659 + 184.2 log [Alizarin Red S]+ 12.9 log2 [Alizarin Red S]. The RSD obtained with ten samples is 4.4%. The probable mechanism involving the perturbation of Alizarin Red S on the oscillating chemical system is also discussed.  |
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| Keywords: | Kinetic determination Alizarin Red S Tetraazamacrocyclic complex Belousov-Zhabotinskii reaction |
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