期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 244, 期 -, 页码 949-957出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.01.093
关键词
Glycerol; Biodiesel; Electrochemical sensor; Copper oxide nanoparticles; Multiwalled carbon nanotubes
资金
- Agencia Nacional de Promocion Cientifica y Tecnologica (FONCYT) [PICT CAMEB - 2012 - No 0855]
- SER-CONACYT No 187488 (Mexico)
- Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET) [PIP 112-201101-00184]
- Ministerio de Ciencia y Tecnologia de la Provincia de Cordoba (MINCyT) [PID 050/2010]
- Secretaria de Ciencia y Tecnica (SECyT) from Universidad Nacional de Rio Cuarto [PPI 2012-2015 Res 328/12]
- Consejo Interuniversitario Nacional (CIN) [Res 2028/15]
A very sensitive electrochemical sensor to determine glycerol (GLY) in biodiesel samples has been developed. It is based on the electrochemical oxidation of GLY at glassy carbon electrodes modified with copper oxide nanoparticles supported on multiwalled carbon nanotubes/pectin composite. The electrochemical oxidation of GLY was studied in pH 8 phosphate buffer solutions. The quantification of GLY was performed by amperometric measurements. The proposed electrochemical sensor improves the performance of others methods developed for the quantitation of GLY. A low limit of detection of 5.8. x 10(-6)g dm -3 and a percent coefficient of variation smaller than 10% was found, along with a reasonable linear range of 9 x 10(-6)-1 x 10(-3) g dm -3. The proposed electrochemical sensor exhibited good performance, stability, reproducibility, repetitiveness and a good detection limit and a linear concentration range to quantify GLY in biodiesel samples. (C) 2017 Elsevier B.V. All rights reserved.
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