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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.)

Simple and direct potentiometric determination of potassium ions in biodiesel microemulsions at a glassy carbon electrode modified with nickel(II) hexacyanoferrate nanoparticles

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Author(s):
Sedenho, Graziela Cristina [1] ; Paim, Leonardo Lataro [1] ; Stradiotto, Nelson Ramos [1]
Total Authors: 3
Affiliation:
[1] Univ Estadual Paulista, Dept Analyt Chem, Inst Chem, Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: ANALYTICAL METHODS; v. 5, n. 16, p. 4145-4151, 2013.
Web of Science Citations: 8
Abstract

Considering the great importance of the determination of inorganic ions present in fuels, particularly in relation to potassium, the scope of this work was to develop a potentiometric method using a chemically modified electrode with nanoparticles of nickel hexacyanoferrate for the determination of potassium ions in a microemulsion of biodiesel. The electrochemical studies showed the possibility of electrochemical measurements in biodiesel microemulsion and the good stability of the modified electrode in this medium. The modified electrodes (surface excess of 16.1 +/- 1.6 nmol cm(-2)) in a microemulsion composed of biodiesel : propan-1-ol : aqueous phase (5 : 70 : 25 in volume) exhibited a detection limit for potassium ions of 5.3 x 10(-5) mol L-1 and a slope of 58 mV, with a linear response in the concentration range of 5.0 x 10(-5) mol L-1 to 1.0 x 10(-2) mol L-1. The recoveries obtained were between 91 and 106%. Thus, the proposed method using the preparation of a microemulsion of the samples proved to be an efficient method for the determination of potassium in biodiesel. (AU)

FAPESP's process: 11/20416-1 - Development of electrochemical detectors consisting of metal nanoparticles on BDD and CNT for the determination of carbohydrates in lignocellulosic material of sugar cane using HPLC
Grantee:Leonardo Lataro Paim
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 11/11589-0 - Development of a sensor for potentiometric determination of potassium in biodiesel microemulsion
Grantee:Graziela Cristina Sedenho
Support Opportunities: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 12/00258-5 - Development of new methods for determination of sugars, furanic aldehydes and ironic acids from lignocellulosic materials derivatives of cane sugar
Grantee:Nelson Ramos Stradiotto
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants