Simultaneous determination of nitro group compounds and explosives combined by voltammetry combined with artificial neural network
DOI:
https://doi.org/10.54939/1859-1043.j.mst.IMBE.2025.122-128Keywords:
Nitrophenol; Nitrobenzene; Dinitrotoluene; Trinitrotoluene; ANN.Abstract
Aromatic nitro compounds exhibit strong electrochemical activity on mercury electrodes. The possibility of simultaneous determination of 2-NP, 3-NP, 4-NP, NB, DNT, and TNT in the same mixture using voltammetry was investigated. This method is based on the depolarization process of these substances on a hanging mercury drop electrode (HMDE) in a buffer solution at pH 4.6 with differential pulse voltammetry (DPV) mode. The peak potentials of the compounds are very close, with overlap and interference between the voltammograms, making it impossible to determine each substance separately in the mixture. In this study, a combination of non-linear multivariate regression using an artificial neural network (ANN) model will be employed for the simultaneous determination of these compounds. The relative standard error obtained by the method is 8.2%, and the correlation coefficient (R) for the substances ranges from 9.5 to 9.8.
References
[1]. Pham Luan, “Các phương pháp phân tích hóa học”, Hanoi University of Science and Technology Publishing House, (2018) (in Vietnamese).
[2]. Khuat Hoang Binh, Tran Van Chung, Ta Thi Thao, Nguyen Thu Huong, "Nghiên cứu xác định một số hợp chất hữu cơ nhóm nitro bằng phương pháp Von-Ampe", Journal of Chemistry, Special Issue T.74/53(5e1), 74–77, (2015) (in Vietnemese).
[3]. Ta Thi Thao, “Giáo trình Chemometrics”, VNU University of Science, (2005) (in Vietnamese).
[4]. Filip Ciepiela, Szymon Wójcik, Małgorzata Jakubowska, "Deep neural networks for separation of overlapping voltammetric signals", Expert Systems with Applications, 276, 126985, (2025).
[5]. Youngnian Ni, Ping Qiu, Serge Kokot, "Simultaneous voltammetric determination of four carbamate pesticides with the use of chemometrics", Analytica Chimica Acta, 537, 321–330, (2005).
[6]. Mohammad-Bagher Gholivand et al., "Chemometrics-assisted simultaneous voltammetric determination of ascorbic acid, uric acid, dopamine and nitrite: Application of non-bilinear voltammetric data for exploiting first-order advantage", Talanta, 119, 553–563, (2014).
[7]. Eda Goz et al., "Total Organic Carbon Prediction with Artificial Intelligence Techniques", Computer Aided Chemical Engineering, 46, 889–894, (2019).
