Electrochemical quantification of mercury (II) in aqueous medium on carbon fiber microelectrode modified with gold nanoparticles
Article Sidebar
Main Article Content
Abstract
Mercury is considered a highly dangerous pollutant due to its high toxicity and its cumulative nature. It has several effects on human health, such as: nervous system disorders, intellectual disorders, gastrointestinal problems, and cancer. The use of electrochemical techniques is an alternative for the determination of mercury due to its low cost and good sensitivity. This research evaluated a carbon fiber microelectrode modified with gold nanoparticles for the quantification of Mercury (II) in aqueous medium. The modification of the carbon fiber was carried out by electrodepositing gold nanoparticles on the surface, imposing -0.1 V for 100 s. Scanning electron microscopy and cyclic voltammetry was used to confirm the presence of gold nanoparticles. The Mercury (II) signal was measured by differential pulse anodic stripping voltammetry (DPASV). In the calibration curve, a linear response was obtained in the range of 50 - 100 µg L-1. The detection and quantification limits obtained were 38 and 46 µg L-1, respectively. The validation of the methodology was performed using the recovery percentage, obtaining recovery between 94 and 104 % and Relative Standard Deviation (RSD) between 3.6 and 4.7 %. The proposed method shows useful characteristics for monitoring mercury.
Downloads
Article Details
- The authors agree to respect the academic information of other authors, and to assign the copyrights to the journal infoANALÍTICA, so that the article can be edited, published and distributed.
- The content of the scientific articles and the publications that appear in the journal is the exclusive responsibility of their authors. The distribution of the articles published in the infoANALÍTICA Journal is done under a Creative Commons Reconocimiento-CompartirIgual 4.0 Internacional License.
References
Abollino, O., Giacomino, A., Malandrino, M., Piscionieri, G., & Mentasti, E. (2008). Determination of mercury by anodic stripping voltammetry with a gold nanoparticle-modified glassy carbon electrode. Electroanalysis, 20(1), 75–83. https://doi.org/10.1002/elan.200704044
Bader, M. (1980). A systematic approach to standard addition methods in instrumental analysis. Journal of Chemical Education, 57(10), 703
Badilla Méndez, C. (2018). Evaluación del grado de contaminación con mercurio (Hg) en Laguna La Señoraza agua, sedimentos y biota. Universidad de Concepción. Facultad de Ciencias Ambientales.
Bernalte, E., Marín Sánchez, C., & Pinilla Gil, E. (2012). Gold nanoparticles-modified screen-printed carbon electrodes for anodic stripping voltammetric determination of mercury in ambient water samples. Sensors and Actuators, B: Chemical, 161(1), 669–674. https://doi.org/10.1016/j.snb.2011.10.088
Bernalte, E., Sánchez, C. M., & Gil, E. P. (2011). Determination of mercury in ambient water samples by anodic stripping voltammetry on screen-printed gold electrodes. Analytica Chimica Acta, 689(1), 60–64. https://doi.org/10.1016/j.aca.2011.01.042
Berrazueta Lanas, M. E. (2015). Desarrollo y validación de un método para la determinación de mercurio en aguas residuales, por voltamperometría (Master's thesis, Quito: UCE.).
Borja Vera, A. R. (2019). Determinación de Pb (II), Zn (II) en cervezas artesanales de Quito, mediante voltametría de redisolución anódica (Bachelor's thesis, PUCE-Quito).
Carrera, P., Espinoza-Montero, P. J., Fernández, L., Romero, H., & Alvarado, J. (2017). Electrochemical determination of arsenic in natural waters using carbon fiber ultra-microelectrodes modified with gold nanoparticles. Talanta, 166, 198–206. https://doi.org/10.1016/j.talanta.2017.01.056
Guan, P., Guo, P. R., Liu, N., Zhang, F., & Lei, Y. Q. (2018). The preparation of a flexible AuNP modified carbon cloth electrode and its application in electrochemical detection of Hg(ii) by continuous flow in environmental water. Analyst, 143(18), 4436–4441. https://doi.org/10.1039/c8an01284a
Hezard, T., Fajerwerg, K., Evrard, D., Collière, V., Behra, P., & Gros, P. (2012). Influence of the gold nanoparticles electrodeposition method on Hg(II) trace electrochemical detection. Electrochimica Acta, 73(Ii), 15–22. https://doi.org/10.1016/j.electacta.2011.10.101
INEN. (2014). Agua Potable. Requisitos. Nte Inen 1108. Retrieved from https://bibliotecapromocion.msp.gob.ec/greenstone/collect/promocin/index/assoc/HASH01a4.dir/doc.pdf%0Ahttp://normaspdf.inen.gob.ec/pdf/nte/1108-5.pdf
Li, Z., Xia, S., Wang, J., Bian, C., & Tong, J. (2016). Determination of trace mercury in water based on N-octylpyridinium ionic liquids preconcentration and stripping voltammetry. Journal of Hazardous Materials, 301, 206–213. https://doi.org/10.1016/j.jhazmat.2015.08.061
Martínez, X. G. (2004). El mercurio como contaminante global: Desarrollo de metodologías para su determinación en suelos contaminados y estrategias para la reducción de su liberación al medio ambiente. Universitat Autònoma de Barcelona, 0, 246. https://doi.org/http://hdl.handle.net/10803/3174
Méndez, C. (2018). Evaluación del grado de contaminación con mercurio (Hg) en Laguna La Señoraza agua, sedimentos y biota (Doctoral dissertation, Universidad de Concepción. Facultad de Ciencias Ambientales)
Richter, P., Toral, M. I., & Abbott, B. (2002). Anodic stripping voltammetric determination of mercury in water by using a new electrochemical flow through cell. Electroanalysis, 14(18), 1288–1293. https://doi.org/10.1002/1521-4109(200210)14:18<1288::AID-ELAN1288>3.0.CO;2-5
Sabino, J. F. P., Valladares, B., Hernández, E., Oliva, B., Del Cid, M., & Reyes, P. J. (2015). Determinación de arsénico y mercurio en agua superficial del lago de Atitlán. Ciencia, Tecnología y Salud, 2(2), 37–44.
Tafur, J., Espinoza-Montero, P., Manciati, C., Fierro-Naranjo, C., Swain, G. M., & Fernández, L. (2018). Evaluation of BDD electrode in the determination of Cd(II), Pb(II) and Hg(II) in wastewater mining (Portovelo – Zaruma, Provincia de El Oro, Ecuador). Rev. Téc. Ing. Univ. Zulia, 41(2). Retrieved from http://produccioncientificaluz.org/index.php/tecnica/article/view/23484