Differential Pulse Voltammetry Technique Using Ferrocene-Modified Carbon Paste Electrodes for Determination of Pb(II) In Kepok Banana
DOI:
https://doi.org/10.15408/jkv.v6i2.16610Keywords:
Carbon paste electrode, differential pulse voltammetry, Pb(II) ion, ferrocene, kepok bananaAbstract
The voltammetry method is a field of electrochemistry that measures electric current at a certain potential, which can be used to determine the concentration of inorganic and organic compounds that can be oxidized or reduced. In this research, the differential pulse voltammetry (DPV) technique has been used to determine the content of Pb(II). The carbon paste electrode (CPE) and ferrocene-modified carbon paste electrode (CPE-Fc) were used as working electrodes. This study aims to improve the sensitivity of Pb(II) measurement. Two parameters were optimized were ferrocene composition and scan rate. The validation parameters involved the linear concentration range, detection limit, quantization limit, precision and accuracy. The optimum ferrocene composition was found at 6%, and scan rate was 15 mV/s using CPE, increase to 20 mV/s using CPE-Fc. The validation results showed the linearity using CPE-Fc wider than CPE at the peak potential of 0.515 V. The detection and quantization limit values using CPE were 0.1551 µg/L and 0.1556 µg/L, and down to 0.1089 µg/L and 0.1090 µg/L using CPE-Fc. The precision determination for both of CPE and CPE-Fc had good results, indicated by the Horwitz ratio less than two. Percentage of recovery using CPE-Fc of 85.59 8.18%. CPE-Fc at the optimum measurement conditions was used to determine the levels of Pb(II) in kepok banana, and the result was obtained 4.4306 0.0009 mg/kg. The level of Pb content was found to exceed the established threshold based on Standard National Indonesia (ISN) No. 7387:2009 which is 0.5 mg/kg.Downloads
References
Adhani R, Husaini. 2017. Logam berat sekitar manusia.Banjarmasin (ID): Lambung Mangkurat University Press.
Alloway BJ. 2013. Sources of heavy metalloids in soils. Journal of Heavy Metals in Soils. 22:11-50
AOAC (Association of Official Analytical Chemist). 1998. Peer-verified methods program manual policies and procedures. AOAC International. MD. Gaithersburg.
Arduini F, Calvo JQ, Palleschi G, Moscone D, Amine A. 2010. Bismuth modified electrodes for lead detection. Trends in Analytical Chemistry. 29(11): 1295-1304.
Badan Standarisasi Nasional. 2009. SNI;7387 Batas maksimum cemaran logam berat dalam pangan. Jakarta (ID): BSN.
Flores E, Pizzaro J, Godoy F, Segura R, Gomez A, Agurto N, Sepulveda P. 2017. An electrochemical sensor for the determination of Cu(II) using a modified electrode with ferrocenyl crown ether compound by square wave anodic stripping voltammetry. Journal of Sensor and Actuators B. 251:433-439
Gonzales J, Soto CM, Molina A. 2009. Square wave voltammetry and volt coulometry applied to electrocatalytic reactions oxidation of ferrocyanide at a ferrocene modified gold electrode. Journal of Electroanalytical Chemistry. 634: 90-97.
Horwitz W, Albert RJ. 2006. The Horwitz Ratio (HorRat): A useful index of method performance with respect to precision. Association of Analytic Chemistry. 89(4): 1095-1109.
Hseltman. 2012. Chapter 7: ANOVA One Way.. citing at 24th June 2020
Liu L, Du J, Li S, Yuan B, Han H, Jing Min, Xia N. 2013. Amplified voltammetric detection of dopamine using ferrocene-capped gold
nanoparticle/streptavidin conjugates. Journal of Biosensors and Bioelectronics. 41: 730-735
Mielke HW, Laidlaw MAS, Gonzales CR. 2011. Estimation of leaded (pb) gasoline’s continuing material and health impacts on 90 us urbanized areas. Journal of Environment International. 37:248-257
Miller JN, Miller JC. 2010. Statistics and chemometric for analytical chemistry, Sixth Edition. England(UK): Pearson Education Limited.
Raoof JB, Ojani R, Baghayeri M. 2011. Sensitive voltammetric determination of captopril using a carbon paste electrode modified with nano-TiO2/ferrocene carbocyclic acid. Journal of Catalysis. 32: 1685-1692
Wang J. 2001. Analytical electrochemistry. 2nd edition. New York(US): Wiley Publisher.
Wu,J., Fu, Q., Lu, B., Li, H., Xu, Z. 2010. Surfactant associated electrochemical properties of ferrocene adsorbed on a glassy carbon electrode modified with multi-walled carbon nanotubes. Journal of Thin Solid Films. 518:3240-3245
Xing W, Yang H, Ippolito JA, Zhang Y, Scheckel KG, Li L. 2020. Lead source and bioaccessibility in windowsill dusts within a Pb smelting-affected area. Journal of Environment Pollution. 266: 1-9.
Zhang C, Nie S, Liang J, Zeng G, Wu H, Hua S, Liu J, Yuan Y, Xiao H, Deng L, Xiang H. 2016. Effect of heavy metals and soil physicochemical properties on wetland soil microbial biomass and bacterial community structure. Science of the Total Environment. (557-558): 785-790.
