Determination of Morin by Using a Briggs-Rauscher Oscillator

作者：Uddin, Waqar; Hu, Gang^*; Sun, Xuanxuan; Ullah, Sail; Sardar, Saira; Zhang Wangning; Nawabi, Muhammad Yasir

来源：International Journal of Electrochemical Science, 2018, 13(1): 598-609.

DOI：10.20964/2018.01.82

• Briggs-Rauscher
• Electrochemical Oscillator
• Morin
• Inhibitory effect

A suitable and convenient method for the analytical determination of morin was established by using Briggs-Rauscher chemical matrix (BR) in the paper. The macrocyclic Ni-complex [NiL](ClO4)(2) was used as catalyst. The ligand L in the complex is 5,7,7,12,14,14-hexamethy1-1,4,8,11-tetraazacyclotetradeca-4,11-diene. Experimental data has absolutely indicated the inhibitory effect caused by morin on the active BR system. Different concentrations of morin ranging from 2.44 x 10(-6) mol/L to 1.30 x 10(-5) mol/L have been tested. As a result, oscillating system stopped to oscillate for some instant and then successfully regenerated. Such phenomenon has concentration dependent, meaning as the concentration of morin were increased, the inhibition time (tin) of the system were increased and vice versa. Thus, by plotting tin against concentrations of morin, a linear regression curve was obtained over a concentration range from 2.44 x 10(-6) mol/L to 1.30 x 10(-5) mol/L of morin with correlation coefficient of 0.98. The calculated RSD value is 2.56 %, which was obtained by the 5-measurements of 1.30 x 10(-5) mol/L morin. Although the reaction of morin and KIO3 was confirm through cyclic voltammetry experiment, actually the t(in) was caused due to the reaction of morin with HOO center dot radical (produced during oscillatory reaction).

• 出版日期2018-1
• 单位安徽大学