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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Determination of amino acids in sugarcane vinasse by ion chromatographic using nickel nanoparticles on reduced graphene oxide modified electrode

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Author(s):
da Silva, Jose Luiz ; Beluomini, Maisa Azevedo ; Sedenho, Graziela Cristina ; Stradiotto, Nelson Ramos
Total Authors: 4
Document type: Journal article
Source: Microchemical Journal; v. 134, p. 374-382, SEP 2017.
Web of Science Citations: 11
Abstract

The present work is aimed at investigating nickel nanoparticles on reduced graphene oxide modified electrode as an amperometric detector along with anion-exchange chromatography. The modified electrode was found to exhibit electrocatalytic oxidation efficiently in relation to amino acids with high stability. The effects of hydroxide and acetate as mobile phase on the retention time, retention factor, separation factor, and peak resolution were subjected to thorough evaluation. The proposed method presented linear ranges from 2.5 x 10(-6) to 1.0 x 10(-3) mol L-1 with excellent correlation coefficient of at least 0.9997 in optimized anion-exchange chromatographic conditions. The limits of detection for all the compounds analyzed ranged from 8.7 x 10(-7) to 2.0 x 10(-5) mol L-1. The amperometric sensitivity was found to be within the range of 3.3 x 10(5) and 5.3 x 10(6) nA ma(-1) L The recovery study showed that the method has good accuracy and repeatability, with recoveries between 95 +/- 4.7 and 100 +/- 1.7%. Experiment results obtained demonstrated that the sensor has relatively good long-term stability, accuracy, and sensitivity, besides being devoid of interference. The proposed analytical method was applied towards the determination of amino acids in sugarcane vinasse sample obtained from a sugar and ethanol plant. (C) 2017 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 14/23846-5 - New methods for determination of carboxylic acids, amino acids and polyols in vinasse of the manufacturing process of ethanol
Grantee:Nelson Ramos Stradiotto
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants