DETERMINATION OF CONSECUTIVE REACTION RATE CONSTANTS BETWEEN GLYCINE AND ISOLEUCINE WITH o-PHTHALDIALDEHYDE AND 2-MERCAPTOETHANOL FROM SINGLE EXPERIMENT DATA

Iip Izul Falah; Triyono Triyono; Catur Atmaji

doi:10.22146/ijc.21414

DETERMINATION OF CONSECUTIVE REACTION RATE CONSTANTS BETWEEN GLYCINE AND ISOLEUCINE WITH o-PHTHALDIALDEHYDE AND 2-MERCAPTOETHANOL FROM SINGLE EXPERIMENT DATA

https://doi.org/10.22146/ijc.21414

Iip Izul Falah^(1*), Triyono Triyono⁽²⁾, Catur Atmaji⁽³⁾

(1) Chemistry Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta 55281
(2) Chemistry Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta 55281
(3) Computer Science and Electronics Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta 55281
(*) Corresponding Author

Abstract

Kinetics study of chemical reaction is important in producing optimum product, designing a reactor, analyzing a compound, and many other purposes. This work presents the result of study of consecutive pseudo first order reaction between glycine and isoleucine with o-phthaldialdehyde and 2-mercaptoethanol in borate buffer solution at pH=9.0. Continuous detection was used to follow the change of fluorescence intensity of formed isoindole during the reaction. Although concentrations of initial compound and its derivative were not known; by using iteration method, the reaction constants could be determined with high precision from single experiment data. Result of the work showed that reaction rate constants k₁ and k₂ for consecutive reaction of glycine with excess of o-phthaldialdehyde and 2-mercaptoethanol were 18.75x10^-3 and 26.70x10^-5 s^-1, respectively; whereas for isoleucine were 6.06x10^-3 and 12.59x10^-5 s^-1, respectively.