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De Morais CP, Babos DV, Costa VC, Neris JB, Nicolodelli G, Mitsuyuki MC, Mauad FF, Mounier S, Milori DMBP. Direct determination of Cu, Cr, and Ni in river sediments using double pulse laser-induced breakdown spectroscopy: Ecological risk and pollution level assessment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 837:155699. [PMID: 35525359 DOI: 10.1016/j.scitotenv.2022.155699] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 04/25/2022] [Accepted: 04/30/2022] [Indexed: 06/14/2023]
Abstract
Double pulse laser-induced breakdown spectroscopy (DP LIBS) has attracted much attention for analyzing trace elements due to its higher sensitivity when compared to single pulse laser-induced breakdown spectroscopy (SP LIBS). However, the development of quantitative methods in LIBS for the analysis of complex samples, such as sediments, is a great challenge due to the matrix effects that are very accentuated in this technique. In this study, different spectral treatments and calibration strategies were investigated to obtain calibration models that allow determinations with satisfactory accuracy and precision of Cr, Cu, and Ni in river sediments from different hydrographic basins. The best model developed for Cr was using MMC without spectral normalization and for Cu and Ni it was using MMC with spectral normalization, and using inverse regression, an increase in the accuracy of the determinations of all analytes was obtained. These models showed limit of quantification (LOQ) of 7.87 mg kg-1, 1.62 mg kg-1, and 2.21 mg kg-1 and root mean square error of prediction (RMSEP) of 7.54 mg kg-1, 14.53 mg kg-1, and 8.29 mg kg-1 for Cr, Cu, and Ni, respectively. Therefore, the models have adequate sensitivity and precision for the quantification of the potentially toxic elements (PTEs) evaluated, since, according to Brazilian legislation, the lower concentration of threshold effect level (TEL) for Cr, Cu, and Ni is <37.3 mg kg-1, <35.7 mg kg-1, and <18 mg kg-1, respectively. The concentrations of Cr, Cu, and Ni determined by DP LIBS allowed to obtain a partial ecological risk assessment of the studied sediments. Also, the chemometric tool Kohonen self-organizing map (KSOM) were used for data interpretation.
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Affiliation(s)
- Carla Pereira De Morais
- São Carlos Institute of Chemistry, University of São Paulo, 13566-590 São Carlos, São Paulo, Brazil; University of Toulon, Aix Marseille University, CNRS/INSU, IRD, MIO UM 110, Mediterranean Institute of Oceanography, CS 60584 83041 Toulon CEDEX 9, France; Embrapa Instrumentation, 13560-970 São Carlos, São Paulo, Brazil.
| | | | | | - Jordan Brizi Neris
- Department of Chemistry, Federal University of São Carlos, 13565-905 São Carlos, São Paulo, Brazil
| | - Gustavo Nicolodelli
- Department of Physics, Federal University of Santa Catarina, 88040-900 Florianópolis, Santa Catarina, Brazil
| | | | - Frederico Fabio Mauad
- São Carlos School of Engineering, University of São Paulo, 13566-590 São Carlos, São Paulo, Brazil
| | - Stéphane Mounier
- University of Toulon, Aix Marseille University, CNRS/INSU, IRD, MIO UM 110, Mediterranean Institute of Oceanography, CS 60584 83041 Toulon CEDEX 9, France.
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Mazzilli BP, Lavieri LGS, Soares JS, Rocha FR, Angelini M, Favaro DIT. Trace and major elements, natural and artificial radionuclides assessment in bottom sediments from Tietê River basin, São Paulo State, Brazil: part III. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-08094-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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