Development of electrochemical detector for high performance liquid chromatography based on a modified electrode with metal nanoparticles for carboxylic acids determination in sugar cane vinasse

• Grant number: 13/09833-5
• Support type: Scholarships in Brazil - Master
• Effective date (Start): August 01, 2013
• Effective date (End): January 31, 2016
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Principal Investigator: Nelson Ramos Stradiotto
• Grantee: Graziela Cristina Sedenho
• Home Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
• Associated scholarship(s): 14/10391-0 - Study of influence of substituents in carboxylic acid structure in the electrochemical oxidation of these compounds in nickel and platinum nanoparticles modified boron-doped diamond electrodes, BE.EP.MS

Abstract

Ethanol is an important component of the Brazilian energy matrix, being produced from sugar cane by fermentation of sugars and subsequent distillation. In the distillation step, an important generated by-product is the vinasse, which for every 1 L of ethanol is generated from 12 to 18 L. Due to its composition is basically composed of organic compounds and nitrogen compounds and salts of potassium, calcium and magnesium, the vinasse has been widely used in the fertigation soils, however, if it is not dosed properly, it may have high power pollutant. Among the organic compounds, carboxylic acids are important because they are present in significant concentrations in the sugar cane vinasse and present significant industrial importance.Among the analytical methods for determination of carboxylic acids, those involving high performance liquid chromatography (HPLC) with electrochemical detection have been highlighted because they allow the separation of complex mixtures, qualitative and quantitative analysis, present good sensitivity, selectivity and wide linear range of response. Chemically modified electrodes with metal nanoparticles have gained ground in electrochemical detection by improving the analytical signal, becoming advantageous it use.Thus, the goal of this project is the development of an electrochemical detector based on an electrode chemically modified with nanoparticles of nickel and copper for the determination of carboxylic acids in sugar cane vinasse using the technique of high performance liquid chromatography by ion exchange.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SEDENHO, GRAZIELA C.; DA SILVA, JOSE LUIZ; BELUOMINI, MAISA A.; DE SA, ACELINO C.; STRADIOTTO, NELSON R. Determination of Electroactive Organic Acids in Sugarcane Vinasse by High Performance Anion-Exchange Chromatography with Pulsed Amperometric Detection Using a Nickel Nanoparticle Modified Boron-Doped Diamond. ENERGY & FUELS, v. 31, n. 3, p. 2865-2870, MAR 2017. Web of Science Citations: 6.

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

SEDENHO, Graziela Cristina. Desenvolvimento de detector eletroquímico para cromatografia líquida de alta eficiência baseado em um eletrodo modificado com nanopartículas metálicas para determinação de ácidos carboxílicos em vinhaça de cana-de-açúcar. 2016. 124 f. Master's Dissertation - Universidade Estadual Paulista "Júlio de Mesquita Filho" Instituto de Química..