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Sewawa K, Mosekiemang T, Dintwe Funding K, Mazrui N, Ngxangxa S, Dikinya O, Sichilongo K, Mbongwe B, Atlhopheng J. Comparison of internal standard and standard additions calibration procedures for the determination of selected heavy metals in treated municipal effluent by MP-AES. RESULTS IN CHEMISTRY 2023. [DOI: 10.1016/j.rechem.2023.100907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023] Open
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Standard dilution analysis using an automatic sampler and a peristaltic pump stopping step for ICP-OES determinations. Microchem J 2023. [DOI: 10.1016/j.microc.2023.108603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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Gonçalves DA, Estadulho GLD, Guima KE, Martins CA. Multi-electrode platform for selective electrochemical sensing: 3D-printed insulating plastic is turned into a five-electrodes chip. Talanta 2022; 250:123705. [PMID: 35759830 DOI: 10.1016/j.talanta.2022.123705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 06/13/2022] [Accepted: 06/16/2022] [Indexed: 10/17/2022]
Abstract
We report a method to turn a 3D-printed plastic piece into a five-electrodes chip for multiple analytes detection. A chip containing Pd, Ni, and Ru working electrodes is used to sense hydroquinone, acetaminophen, salicylic acid, and hydroxychloroquine at once. The analysis is sequentially achieved simply by changing the proper electrode connection, without changing mobile parts, neither adding reactants, nor electrolytes. This strategy is an alternative for low-cost selective electrochemical detection.
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Affiliation(s)
- Daniel A Gonçalves
- Faculty of Exact Sciences and Technology, Federal University of Grande Dourados, 79804-970, Dourados, MS, Brazil.
| | - Glinka L D Estadulho
- Institute of Physics, Universidade Federal de Mato Grosso do Sul, CP 549, 79070-900, Campo Grande, MS, Brazil
| | - Katia-Emiko Guima
- Institute of Physics, Universidade Federal de Mato Grosso do Sul, CP 549, 79070-900, Campo Grande, MS, Brazil
| | - Cauê A Martins
- Institute of Physics, Universidade Federal de Mato Grosso do Sul, CP 549, 79070-900, Campo Grande, MS, Brazil.
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Gonçalves DA, Carmo JS, Zanon LTS, Marangoni BS, Cena C, Camara GA, Donati GL, Trindade MAG. Simultaneous quantification of seven multi-class organic molecules by single-shot dilution differential pulse voltammetric calibration. Talanta 2022; 237:122975. [PMID: 34736697 DOI: 10.1016/j.talanta.2021.122975] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/13/2021] [Accepted: 10/14/2021] [Indexed: 02/05/2023]
Abstract
The contamination of water sources by anthropogenic activities is a topic of growing interest in the scientific community. Therefore, robust analytical techniques for the determination and quantification of multiple substances are needed, which often require complex and time-consuming procedures. In this context, we describe a univariate calibration method to determine emerging multi-class contaminants in different water sources. The instrumental setup is composed of a lab-made glass electrochemical cell with three electrodes: Pt counter, Ag/AgCl reference, and BDD working electrodes. With this system, we were able to simultaneously quantify tert-butylhydroquinone, acetaminophen, estrone, sulfamethoxazole, enrofloxacin, caffeine, and ibuprofen by differential pulse voltammetry. Only two calibration solutions are required for the Single-shot Dilution Differential Pulse Voltammetric Calibration (SSD-DP-VC) method described here, which can significantly improve sample throughput. Two robust univariate calibration strategies were also applied and compared with SSD-DP-VC. The new method is simple, fast, and comparable with traditional calibration methods, showing similar precision and accuracy for all determinations evaluated.
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Affiliation(s)
- Daniel A Gonçalves
- Faculdade de Ciências Exatas e Tecnologia, Universidade Federal da Grande Dourados, Rodovia Dourados-Itahum, km 12, CEP 79804-970, Dourados, MS, Brazil.
| | - Jéssica S Carmo
- Faculdade de Ciências Exatas e Tecnologia, Universidade Federal da Grande Dourados, Rodovia Dourados-Itahum, km 12, CEP 79804-970, Dourados, MS, Brazil
| | - Layne Taynara S Zanon
- Faculdade de Ciências Exatas e Tecnologia, Universidade Federal da Grande Dourados, Rodovia Dourados-Itahum, km 12, CEP 79804-970, Dourados, MS, Brazil
| | - Bruno S Marangoni
- Optics and Photonics Group, Institute of Physics, Federal University of Mato Grosso do Sul - UFMS, Brazil
| | - Cícero Cena
- Optics and Photonics Group, Institute of Physics, Federal University of Mato Grosso do Sul - UFMS, Brazil
| | - Giuseppe A Camara
- Institute of Chemistry/UFMS, Box 549, 79070-900, Campo Grande, MS, Brazil
| | - George L Donati
- Department of Chemistry, Wake Forest University, Salem Hall, Box 7486, Winston-Salem, NC, 27109, USA
| | - Magno A G Trindade
- Faculdade de Ciências Exatas e Tecnologia, Universidade Federal da Grande Dourados, Rodovia Dourados-Itahum, km 12, CEP 79804-970, Dourados, MS, Brazil; Unesp, National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), Institute of Chemistry, CEP 14800-900, Araraquara, SP, Brazil
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Gaikwad R, Thangaraj PR, Sen AK. Microfluidics-based rapid measurement of nitrite in human blood plasma. Analyst 2022; 147:3370-3382. [DOI: 10.1039/d2an00020b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report direct and rapid measurement of nitrite in human blood plasma using a fluorescence-based microfluidic method.
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Affiliation(s)
- R. Gaikwad
- Micro Nano Bio-Fluidics Unit, Fluid Systems Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai-600036, India
| | - P. R. Thangaraj
- Department of Cardiothoracic Surgery, Apollo Hospital, Chennai, 600006, India
| | - A. K. Sen
- Micro Nano Bio-Fluidics Unit, Fluid Systems Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai-600036, India
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