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Miranda JLA, Mesquita RBR, Leite A, Silva AMN, Rangel M, Rangel AOSS. Non-transferrin-bound iron determination in blood serum using microsequential injection solid phase spectrometry- proof of concept. Talanta 2023; 257:124345. [PMID: 36791595 DOI: 10.1016/j.talanta.2023.124345] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 02/07/2023] [Accepted: 02/09/2023] [Indexed: 02/12/2023]
Abstract
Non-transferrin-bound iron (NTBI) is a group of circulating toxic iron forms, which occur in iron overload or health conditions with dysregulation of iron metabolism. NTBI is responsible for increased oxidative stress and tissue iron loading. Despite its relevance as a biochemical marker in several diseases, a standardized assay is still lacking. Several methods were developed to quantify NTBI, but results show high inter-method and even inter-laboratory variability. Thus, the development of a consistent NTBI assay is a major goal in the management of iron overload and related clinical conditions. In this work, a micro sequential injection lab-on-valve (μSI-LOV) method in a solid phase spectrophotometry (SPS) mode was developed for the quantification of NTBI, using a bidentate 3,4-hydroxypyridinone (3,4-HPO) ligand anchored to sepharose beads as a chromogenic reagent. To attain SPS, the functionalized beads were packed into a column in the flow cell, and the analyte, NTBI retained as iron (III), formed a colored complex at the beads while eliminating the sample matrix. The dynamic concentration range was 1.62-7.16 μmol L-1 of iron (III), with a limit of detection of 0.49 μmol L-1 and a limit of quantification of 1.62 μmol L-1. The proposed μSI-LOV-SPS method is a contribution to the development of an automatic method for the quantification of the NTBI in serum samples.
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Affiliation(s)
- Joana L A Miranda
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho, 1327, 4169-005, Porto, Portugal
| | - Raquel B R Mesquita
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho, 1327, 4169-005, Porto, Portugal.
| | - Andreia Leite
- REQUIMTE - LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal
| | - André M N Silva
- REQUIMTE - LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal; REQUIMTE - LAQV, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - Maria Rangel
- REQUIMTE - LAQV, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - António O S S Rangel
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho, 1327, 4169-005, Porto, Portugal.
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2
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Pagliano E, Keegan E, Varga Z, Nadeau K, Meija J, Wong H, Vardanega C, Wallenius M, Mayer K, Cochrane C, El-Jaby A, Mester Z. Determination of inorganic anions in uranium ore concentrate reference materials. J Radioanal Nucl Chem 2023. [DOI: 10.1007/s10967-023-08837-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
AbstractThe determination of inorganic anions in uranium ore concentrates (UOCs) is useful to nuclear forensics for establishing the provenance of sample materials. In this collaborative study, quantitation of inorganic anions was carried out on three UOC reference materials from the National Research Council Canada: UCLO-1 (https://doi.org/10.4224/crm.2020.uclo-1), UCHI-1 (https://doi.org/10.4224/crm.2020.uchi-1), and UPER-1 (https://doi.org/10.4224/crm.2020.uper-1). The analytes were extracted into water and characterized by ion chromatography with combined standard uncertainties (uc) between 1.6 and 11%. The highest contributor to uc was homogeneity. Sulfate was the most abundant anion (2000–12,000 mg/kg SO42−). Other anions were in the 15–500 mg/kg range.
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Aguinaga Martínez MV, Jozičová N, Dušek J, Horstkotte B, Pávek P, Miró M, Sklenářová H. Real-time monitoring of Metridia luciferase release from cells upon interaction with model toxic substances by a fully automatic flow setup - A proof of concept. Talanta 2022; 245:123465. [PMID: 35427949 DOI: 10.1016/j.talanta.2022.123465] [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: 02/15/2022] [Revised: 04/04/2022] [Accepted: 04/05/2022] [Indexed: 11/25/2022]
Abstract
This manuscript reports on a fully automatic sequential injection system incorporating a 3D printed module for real-time monitoring of the release of Metridia luciferase from a modified liver epithelial cell line. To this end, a simple and effective approach for the automation of flash-type chemiluminescence assays was developed. The 3D printed module comprised an apical and a basal compartment that enabled monitoring membrane processes on both sides of the cell monolayer aimed at elucidating the direction of luciferase release. A natural release was observed after transfection with the luciferase plasmid by online measurement of the elicited light from the reaction of the synthesized luciferase with the coelenterazine substrate. Model substances for acute toxicity from the group of cholic acids - chenodeoxycholic and deoxycholic acids - were applied at the 1.0 and 0.5 mmol L-1 levels. The tested cholic acids caused changes in cell membrane permeability that was accompanied by an increased luciferase release. The obtained kinetic profiles were evaluated based on the delay between the addition of the toxic substance and the increase of the chemiluminescence signal. All experiments were carried out in a fully automatic system in ca. 5 min per sample in 30 min intervals and no manual interventions were needed for a sampling period of at least 6 h.
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Affiliation(s)
- Maite V Aguinaga Martínez
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Akademika Heyrovského 1203, 500 05, Hradec Králové, Czech Republic; INQUISUR, Departamento de Química, Universidad Nacional del Sur (UNS)-CONICET, Av. Alem 1253, 8000, Bahía Blanca, Argentina
| | - Natali Jozičová
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Akademika Heyrovského 1203, 500 05, Hradec Králové, Czech Republic
| | - Jan Dušek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Králové, Charles University, Akademika Heyrovského 1203, 500 05, Hradec Králové, Czech Republic
| | - Burkhard Horstkotte
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Akademika Heyrovského 1203, 500 05, Hradec Králové, Czech Republic
| | - Petr Pávek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Králové, Charles University, Akademika Heyrovského 1203, 500 05, Hradec Králové, Czech Republic
| | - Manuel Miró
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Akademika Heyrovského 1203, 500 05, Hradec Králové, Czech Republic; FI-TRACE Group, Department of Chemistry, University of the Balearic Islands, Carretera de Valldemossa km 7.5, E-07122, Palma de Mallorca, Spain
| | - Hana Sklenářová
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Akademika Heyrovského 1203, 500 05, Hradec Králové, Czech Republic.
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Zhang M, Smejkal P, Bester N, Robertson J, Atia MA, Townsend AT, Guijt RM, Breadmore MC. Inexpensive Portable Capillary Electrophoresis Instrument for Monitoring Zinc(II) in Remote Areas. J Chromatogr A 2022; 1668:462895. [DOI: 10.1016/j.chroma.2022.462895] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 02/01/2022] [Accepted: 02/10/2022] [Indexed: 11/28/2022]
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Kościelniak P, Dębosz M, Wieczorek M, Migdalski J, Szufla M, Matoga D, Kochana J. The Use of an Acylhydrazone-Based Metal-Organic Framework in Solid-Contact Potassium-Selective Electrode for Water Analysis. MATERIALS 2022; 15:ma15020579. [PMID: 35057298 PMCID: PMC8781722 DOI: 10.3390/ma15020579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/16/2021] [Accepted: 01/10/2022] [Indexed: 01/27/2023]
Abstract
A solid-contact ion-selective electrode was developed for detecting potassium in environmental water. Two versions of a stable cadmium acylhydrazone-based metal organic framework, i.e., JUK-13 and JUK-13_H2O, were used for the construction of the mediation layer. The potentiometric and electrochemical characterizations of the proposed electrodes were carried out. The implementation of the JUK-13_H2O interlayer is shown to improve the potentiometric response and stability of measured potential. The electrode exhibits a good Nernstian slope (56.30 mV/decade) in the concentration range from 10−5 to 10−1 mol L−1 with a detection limit of 2.1 µmol L−1. The long-term potential stability shows a small drift of 0.32 mV h−1 over 67 h. The electrode displays a good selectivity comparable to ion-selective electrodes with the same membrane. The K-JUK-13_H2O-ISE was successfully applied for the determination of potassium in three certified reference materials of environmental water with great precision (RSD < 3.00%) and accuracy (RE < 3.00%).
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Affiliation(s)
- Paweł Kościelniak
- Department of Analytical Chemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland; (M.D.); (M.W.); (J.K.)
- Correspondence:
| | - Marek Dębosz
- Department of Analytical Chemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland; (M.D.); (M.W.); (J.K.)
| | - Marcin Wieczorek
- Department of Analytical Chemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland; (M.D.); (M.W.); (J.K.)
| | - Jan Migdalski
- Department of Analytical Chemistry and Biochemistry, Faculty of Materials and Ceramics, AGH University of Science and Technology, A. Mickiewicza 30, 30-059 Kraków, Poland;
| | - Monika Szufla
- Department of Inorganic Chemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland; (M.S.); (D.M.)
| | - Dariusz Matoga
- Department of Inorganic Chemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland; (M.S.); (D.M.)
| | - Jolanta Kochana
- Department of Analytical Chemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland; (M.D.); (M.W.); (J.K.)
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6
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Bi Y, Hao X, Dai L, Peng Y, Tie J, Tian Y, Liao F, Li Y, He W, Li S, Zhang L, Zhao Z, Wu J, Wang H. Variable Selection for Referenceless Multivariate Calibration: A Case Study on Nicotine Determination in Flue-Cured Tobacco Powder by Near-Infrared (NIR) Spectroscopy. ANAL LETT 2021. [DOI: 10.1080/00032719.2021.1974028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Yiming Bi
- Technology Center, China Tobacco Zhejiang Industrial Company, Hangzhou, Zhejiang, China
| | - Xianwei Hao
- Technology Center, China Tobacco Zhejiang Industrial Company, Hangzhou, Zhejiang, China
| | - Lu Dai
- Technology Center, China Tobacco Zhejiang Industrial Company, Hangzhou, Zhejiang, China
| | - Yuhan Peng
- Technology Center, China Tobacco Zhejiang Industrial Company, Hangzhou, Zhejiang, China
| | - Jinxin Tie
- Technology Center, China Tobacco Zhejiang Industrial Company, Hangzhou, Zhejiang, China
| | - Yunong Tian
- Technology Center, China Tobacco Zhejiang Industrial Company, Hangzhou, Zhejiang, China
| | - Fu Liao
- Technology Center, China Tobacco Zhejiang Industrial Company, Hangzhou, Zhejiang, China
| | - Yongsheng Li
- Technology Center, China Tobacco Zhejiang Industrial Company, Hangzhou, Zhejiang, China
| | - Wenmiao He
- Technology Center, China Tobacco Zhejiang Industrial Company, Hangzhou, Zhejiang, China
| | - Shitou Li
- Technology Center, China Tobacco Zhejiang Industrial Company, Hangzhou, Zhejiang, China
| | - Lili Zhang
- Technology Center, China Tobacco Zhejiang Industrial Company, Hangzhou, Zhejiang, China
| | - Zhenjie Zhao
- Technology Center, China Tobacco Zhejiang Industrial Company, Hangzhou, Zhejiang, China
| | - Jizhong Wu
- Technology Center, China Tobacco Zhejiang Industrial Company, Hangzhou, Zhejiang, China
| | - Hui Wang
- Technology Center, China Tobacco Zhejiang Industrial Company, Hangzhou, Zhejiang, China
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Azevedo AMO, Vilaranda AG, Neves AFDC, Sousa MJ, Santos JLM, Saraiva MLMFS. Development of an automated yeast-based spectrophotometric method for toxicity screening: Application to ionic liquids, GUMBOS, and deep eutectic solvents. CHEMOSPHERE 2021; 277:130227. [PMID: 33794429 DOI: 10.1016/j.chemosphere.2021.130227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 03/09/2021] [Accepted: 03/10/2021] [Indexed: 06/12/2023]
Abstract
Saccharomyces cerevisiae has been used as a eukaryotic model organism for studying the toxic effects of various compounds. In this context, an automated spectrophotometric method based on the enzymatic reduction of methylene blue dye to a colorless product by living yeast cells was implemented in a sequential injection analysis system. Loss of yeast viability/impaired metabolic activity was monitored by an increase in optical density at 664 nm. To prove the usefulness of this approach, the toxicity of ILs (ionic liquids), GUMBOS (group of uniform materials based on organic salts), and DESs (deep eutectic solvents) was examined. Differences obtained between IC50 values confirmed the impact of structural elements on each compounds' toxicity. While DESs appeared to be less toxic than ILs, GUMBOS were found to be among the most toxic compounds to yeast cells and thus can be viewed as promising antimicrobial candidates. The automated methodology showed satisfactory repeatability and reproducibility (RSD < 9%), which is in good agreement with Green Chemistry principles. In fact, the method required consumption of only 40 μL of reagents and produced less than 2 mL of effluents per cycle. Thus, the developed assay can be used as an alternative tool for toxicity screening.
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Affiliation(s)
- Ana M O Azevedo
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal
| | - André G Vilaranda
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal
| | - Ana F D C Neves
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal
| | - Maria João Sousa
- CBMA, Departamento de Biologia, Universidade do Minho, Braga, Portugal
| | - João L M Santos
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal
| | - M Lúcia M F S Saraiva
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal.
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8
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Application of thymine-based copolymers in the quantification of organic pollutants in water by sensitized fluorescence. Microchem J 2020. [DOI: 10.1016/j.microc.2020.104625] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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10
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Marinho OR, Lima MJA, Reis BF. Automatic multicommuted flow-batch setup for photometric determination of mercury in drinking water at ppb level. Talanta 2020; 206:120207. [PMID: 31514857 DOI: 10.1016/j.talanta.2019.120207] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 07/30/2019] [Accepted: 07/31/2019] [Indexed: 11/24/2022]
Abstract
Herein, a multicommuted flow-batch setup and a photometric procedure for the determination of mercury at the ppb level in aqueous samples are described. The setup was designed to implement a versatile solvent extraction and pre-concentration strategy by combining flow-batch and multicommuted flow analysis approaches. The photometric method was based on Hg(II) reaction with dithizone in a chloroform medium, which was also used as the extracting organic solvent. The flow analysis system was composed of a homemade syringe pump module, a set of solenoid valves, two Aquarius mini-pumps, and a flow-batch chamber. The homemade photometer was comprised of a light emitting diode (LED), photodiode, and homemade flow cell (50 mm length). The flow system and photometer were controlled using an Arduino Due board, running custom-written software. After optimizing the operational conditions, the effectiveness of the developed system was evaluated for the determination of the mercury concentration in drinking water. For accuracy assessment, samples were analyzed using a spiking methodology and an independent method, yielding a recovery ranging from 92% to 108%. Other important characteristics of the proposed method were found as follows: linear response range, 0.5-10.0 μg L-1 (r = 0.9984); limit of detection 0.38 μg L-1 Hg(II); consumption of dithizone and chloroform, 1.85 μg L-1 and 0.8 mL per analysis, respectively; coefficient of variation, 2% (n = 10); sampling throughput, 20 determinations per h.
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Affiliation(s)
- Oziel R Marinho
- Department of Chemistry, Federal University of São Carlos, São Carlos, SP, 13560-970, Brazil; Center for Nuclear Energy in Agriculture, University of São Paulo, Piracicaba, SP, 13416-000, Brazil.
| | - Manoel J A Lima
- Center for Nuclear Energy in Agriculture, University of São Paulo, Piracicaba, SP, 13416-000, Brazil.
| | - Boaventura F Reis
- Center for Nuclear Energy in Agriculture, University of São Paulo, Piracicaba, SP, 13416-000, Brazil.
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Exploitation of reaction mechanisms for sensitivity enhancement in the determination of phosphorus by sequential injection analysis. Talanta 2019; 209:120589. [PMID: 31892016 DOI: 10.1016/j.talanta.2019.120589] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 11/21/2019] [Accepted: 11/22/2019] [Indexed: 11/24/2022]
Abstract
The molybdenum blue method using antimony and ascorbic acid was studied for the determination of phosphorus (as orthophosphate) by means of sequential injection analysis (SIA). In order to avoid the interference of the Schlieren effect in the photometric measurements a stopped-flow kinetic approach was adopted monitoring the absorbance of the reaction bolus inside the flow cell. Aiming at enhancing the sensitivity of the method, the effect of the order of addition of the reactants was studied. It was found that the best sensitivity was attained by adding separate reagents and acidifying only after the phosphate, molybdate and antimony solutions were already mixed; the reductant (ascorbic acid) was then added. In this way a sensitivity enhancement in excess of 10 times was obtained when compared to the addition of the phosphate solution to the acidified mixture of molybdate and antimony. It is proposed that the difference in sensitivities could be explained by the existence of different mechanisms for the formation of the intermediate phosphoantimonyl molybdic acid (PMA). Thus the selected sequence in the order of addition, where sulphuric acid is added to the mixture of the other reactants would lead to higher production of PMA in turn conducting to a faster reduction reaction. The resulting SIA method was validated finding limits of detection (3s/m) and quantification (10s/m) of 0.0077 and 0.026 mg-P L-1 respectively. Linearity was confirmed in the range up to 2 mg-P L-1. Precisions (sr, n = 10) were in the range 1.8%-4.0%. 32 water samples of different types and origins were analysed by the proposed method and by ion chromatography, obtaining a regression curve y = 0.990× - 0.0019, with a determination coefficient R2 = 0.973.
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12
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Fang T, Li P, Lin K, Chen N, Jiang Y, Chen J, Yuan D, Ma J. Simultaneous underway analysis of nitrate and nitrite in estuarine and coastal waters using an automated integrated syringe-pump-based environmental-water analyzer. Anal Chim Acta 2019; 1076:100-109. [DOI: 10.1016/j.aca.2019.05.036] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Revised: 04/25/2019] [Accepted: 05/16/2019] [Indexed: 12/18/2022]
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13
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Gil R, Amorim C, Montenegro M, Araújo A. Potentiometric detection in liquid chromatographic systems: An overview. J Chromatogr A 2019; 1602:326-340. [DOI: 10.1016/j.chroma.2019.06.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 05/30/2019] [Accepted: 06/03/2019] [Indexed: 10/26/2022]
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14
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Huang J, Chow CW, Kuntke P, Cruveiller L, Gnos G, Davey DE, Teasdale PT. The development and evaluation of a microstill with conductance detection for low level ammonia monitoring in chloraminated water. Talanta 2019; 200:256-262. [DOI: 10.1016/j.talanta.2019.03.043] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 03/06/2019] [Accepted: 03/08/2019] [Indexed: 11/17/2022]
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Liang Y, Liu Q, Liu S, Li X, Li Y, Zhang M. One-step 3D printed flow cells using single transparent material for flow injection spectrophotometry. Talanta 2019; 201:460-464. [PMID: 31122451 DOI: 10.1016/j.talanta.2019.04.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 04/01/2019] [Accepted: 04/04/2019] [Indexed: 12/21/2022]
Abstract
A very simple approach to fabricate flow-through cells for flow injection spectrophotometry is proposed. Flow cells are completely fused deposition modelling 3D printed by using coloured-transparent polylactic acid filament. Channels with 1.0 mm i.d. circular cross section and optical windows of 0.3-1.0 mm thickness are fabricated. Thin layers of the transparent material allow light transmitting with low attenuation, but coloured cell body can prevent stray light transmitting through. Transparent 3D printing filaments of different colours are compared and Grey-transparent (Grey-T) provides highest sensitivity for the determination of nitrite via Griess reaction. Flow cells of 10-50 mm pathlength have been fabricated by using the Grey-T filament. Effective pathlengths are estimated to be 83.9-96.2% of the physical pathlengths. The printing fabricated cells are used for flow injection analysis of nitrite, and linear correlation (R2 = 0.9991-0.9999) and limits of detection of 0.27, 0.087 and 0.045 μM for 10, 30 and 50 mm cells, are obtained. The 3D printed flow cells have acceptable chemical compatibility and signal stability.
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Affiliation(s)
- Ying Liang
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, China; The Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin, Guangxi, 541004, China
| | - Qiang Liu
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, China
| | - Shuai Liu
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, China
| | - Xiaoyu Li
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, China
| | - Yan Li
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, China
| | - Min Zhang
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, China.
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Alarfaj NA, Al-tamimi SA, El-Tohamy MF, Al-dughmi MS. Prospects for using a new sequential chemiluminescence strategy for monitoring the caffeine content in soft and energy drinks via the catalytic activities of different nano-metal oxides. LUMINESCENCE 2019; 34:222-233. [DOI: 10.1002/bio.3599] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 01/02/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Nawal A. Alarfaj
- Department of Chemistry, College of Science; King Saud University; P.O. Box 22452 Riyadh Saudi Arabia
| | - Salma A. Al-tamimi
- Department of Chemistry, College of Science; King Saud University; P.O. Box 22452 Riyadh Saudi Arabia
| | - Maha F. El-Tohamy
- Department of Chemistry, College of Science; King Saud University; P.O. Box 22452 Riyadh Saudi Arabia
| | - Maha S. Al-dughmi
- Department of Chemistry, College of Science; King Saud University; P.O. Box 22452 Riyadh Saudi Arabia
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17
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Miranda JL, Mesquita RB, Nunes A, Rangel M, Rangel AO. Determination of iron(III) in water samples by microsequential injection solid phase spectrometry using an hexadentate 3-hydroxy-4-pyridinone chelator as reagent. Talanta 2019; 191:409-414. [DOI: 10.1016/j.talanta.2018.08.063] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 07/12/2018] [Accepted: 08/24/2018] [Indexed: 10/28/2022]
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18
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Ribeiro LF, Lopes Martins R, de Souza Costa DM, Masini JC. Poly glycidyl methacrylate-co-ethylene dimethacrylate porous monolith as a versatile platform for the development of separations and solid-phase extractions in sequential injection analyzers. J Sep Sci 2018; 41:4449-4457. [DOI: 10.1002/jssc.201800995] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 10/17/2018] [Accepted: 10/18/2018] [Indexed: 01/05/2023]
Affiliation(s)
- Luiz F. Ribeiro
- Departamento de Química Fundamental; Instituto de Química; Universidade de São Paulo; São Paulo SP Brazil
| | - Renan Lopes Martins
- Departamento de Química Fundamental; Instituto de Química; Universidade de São Paulo; São Paulo SP Brazil
| | - Diego M. de Souza Costa
- Departamento de Química Fundamental; Instituto de Química; Universidade de São Paulo; São Paulo SP Brazil
| | - Jorge C. Masini
- Departamento de Química Fundamental; Instituto de Química; Universidade de São Paulo; São Paulo SP Brazil
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19
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Ma J, Li P, Chen Z, Lin K, Chen N, Jiang Y, Chen J, Huang B, Yuan D. Development of an Integrated Syringe-Pump-Based Environmental-Water Analyzer ( iSEA) and Application of It for Fully Automated Real-Time Determination of Ammonium in Fresh Water. Anal Chem 2018; 90:6431-6435. [PMID: 29730934 DOI: 10.1021/acs.analchem.8b01490] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The development of a multipurpose integrated syringe-pump-based environmental-water analyzer ( iSEA) and its application for spectrophotometric determination of ammonium is presented. The iSEA consists of a mini-syringe pump equipped with a selection valve and laboratory-programmed software written by LabVIEW. The chemistry is based on a modified indophenol method using o-phenylphenol. The effect of reagent concentrations and sample temperatures was evaluated. This fully automated analyzer had a detection limit of 0.12 μM with sample throughput of 12 h-1. Relative standard deviations at different concentrations (0-20 μM) were 0.23-3.36% ( n = 3-11) and 1.0% ( n = 144, in 24 h of continuous measurement, ∼5 μM). Calibration curves were linear ( R2 = 0.9998) over the range of 0-20 and 0-70 μM for the detection at 700 and 600 nm, respectively. The iSEA was applied in continuous real-time monitoring of ammonium variations in a river for 24 h and 14 days. A total of 1802 samples were measured, and only 0.4% was outlier data (≥3 sigma residuals). Measurements of reference materials and different aqueous samples ( n = 26) showed no significant difference between results obtained by reference and present methods. The system is compact (18 cm × 22 cm × 24 cm), portable (4.8 kg), and robust (high-resolution real-time monitoring in harsh environments) and consumes a small amount of chemicals (20-30 μL/run) and sample/standards (2.9 mL/run).
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Affiliation(s)
- Jian Ma
- State Key Laboratory of Marine Environmental Science, Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology , Xiamen University , Xiamen 361102 , People's Republic of China
| | - Peicong Li
- State Key Laboratory of Marine Environmental Science, Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology , Xiamen University , Xiamen 361102 , People's Republic of China
| | - Zhaoying Chen
- State Key Laboratory of Marine Environmental Science, Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology , Xiamen University , Xiamen 361102 , People's Republic of China
| | - Kunning Lin
- State Key Laboratory of Marine Environmental Science, Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology , Xiamen University , Xiamen 361102 , People's Republic of China
| | - Nengwang Chen
- State Key Laboratory of Marine Environmental Science, Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology , Xiamen University , Xiamen 361102 , People's Republic of China
| | - Yiyong Jiang
- State Key Laboratory of Marine Environmental Science, Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology , Xiamen University , Xiamen 361102 , People's Republic of China
| | - Jixin Chen
- State Key Laboratory of Marine Environmental Science, Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology , Xiamen University , Xiamen 361102 , People's Republic of China
| | - Bangqin Huang
- State Key Laboratory of Marine Environmental Science, Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology , Xiamen University , Xiamen 361102 , People's Republic of China
| | - Dongxing Yuan
- State Key Laboratory of Marine Environmental Science, Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology , Xiamen University , Xiamen 361102 , People's Republic of China
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20
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Hárendarčíková L, Petr J. Smartphones & microfluidics: Marriage for the future. Electrophoresis 2018; 39:1319-1328. [DOI: 10.1002/elps.201700389] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 02/19/2018] [Accepted: 02/21/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Lenka Hárendarčíková
- Regional Centre of Advanced Technologies and Materials, Department of Analytical Chemistry, Faculty of Science; Palacký University in Olomouc; Olomouc Czech Republic
| | - Jan Petr
- Regional Centre of Advanced Technologies and Materials, Department of Analytical Chemistry, Faculty of Science; Palacký University in Olomouc; Olomouc Czech Republic
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21
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Li T, Panther J, Qiu Y, Liu C, Huang J, Wu Y, Wong PK, An T, Zhang S, Zhao H. Gas-Permeable Membrane-Based Conductivity Probe Capable of In Situ Real-Time Monitoring of Ammonia in Aquatic Environments. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:13265-13273. [PMID: 29067813 DOI: 10.1021/acs.est.7b03552] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Aquatic ammonia has toxic effects on aquatic life. This work reports a gas-permeable membrane-based conductivity probe (GPMCP) developed for real-time monitoring of ammonia in aquatic environments. The GPMCP innovatively combines a gas-permeable membrane with a boric acid receiving phase to selectively extract ammonia from samples and form ammonium at the inner membrane interface. The rate of the receiving phase conductivity increase is directly proportional to the instantaneous ammonia concentration in the sample, which can be rapidly and sensitively determined by the embedded conductivity detector. A precalibration strategy was developed to eliminate the need for an ongoing calibration. The analytical principle and GPMCP performance were systematically validated. The laboratory results showed that ammonia concentrations ranging from 2 to 50 000 μg L-1 can be detected. The field deployment results demonstrated the GPMCP's ability to obtain high-resolution continuous ammonia concentration profiles and the absolute average ammonia concentration over a prolonged deployment period. By inputting the temperature and pH data, the ammonium concentration can be simultaneously derived from the corresponding ammonia concentration. The GPMCP embeds a sophisticated analytical principle with the inherent advantages of high selectivity, sensitivity, and accuracy, and it can be used as an effective tool for long-term, large-scale, aquatic-environment assessments.
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Affiliation(s)
- Tianling Li
- Centre for Clean Environment and Energy, Gold Coast Campus, Griffith University , Southport, QLD 4222, Australia
| | - Jared Panther
- Centre for Clean Environment and Energy, Gold Coast Campus, Griffith University , Southport, QLD 4222, Australia
- Goulburn-Murray Water , Tatura, VIC 3616, Australia
| | - Yuan Qiu
- Centre for Clean Environment and Energy, Gold Coast Campus, Griffith University , Southport, QLD 4222, Australia
- Guangxi Vocational and Technical Institute of Industry , 37 Xiuling Road, Nanning, Guangxi 530005, China
| | - Chang Liu
- Centre for Clean Environment and Energy, Gold Coast Campus, Griffith University , Southport, QLD 4222, Australia
- Department of Chemistry, Liaoning Medical University , 40 Songpo Road, Jinzhou, Liaoning 121001, China
| | - Jianyin Huang
- Centre for Clean Environment and Energy, Gold Coast Campus, Griffith University , Southport, QLD 4222, Australia
- Division of Information Technology, Engineering and Environment, School of Natural and Built Environment, Mason Lakes Campus, University of South Australia , Adelaide, SA 5095, Australia
| | - Yonghong Wu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences , 71 East Beijing Road, Nanjing, Jiangsu 210008, China
| | - Po Keung Wong
- School of Life Sciences, The Chinese University of Hong Kong , Shatin, NT, Hong Kong SAR, China
| | - Taicheng An
- Institute of Environmental Health and Pollution Control, School of Environmental Science and Engineering, Guangdong University of Technology , Guangzhou, 510006, China
| | - Shanqing Zhang
- Centre for Clean Environment and Energy, Gold Coast Campus, Griffith University , Southport, QLD 4222, Australia
| | - Huijun Zhao
- Centre for Clean Environment and Energy, Gold Coast Campus, Griffith University , Southport, QLD 4222, Australia
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22
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Lin K, Ma J, Yuan D, Feng S, Su H, Huang Y, Shangguan Q. Sequential determination of multi-nutrient elements in natural water samples with a reverse flow injection system. Talanta 2017; 167:166-171. [DOI: 10.1016/j.talanta.2017.01.063] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 01/23/2017] [Accepted: 01/24/2017] [Indexed: 02/01/2023]
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23
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Costa SPF, Pereira SAP, Pinto PCAG, Araujo ARTS, Passos MLC, Saraiva MLMFS. Environmental Impact of Ionic Liquids: Automated Evaluation of the Chemical Oxygen Demand of Photochemically Degraded Compounds. Chemphyschem 2017; 18:1351-1357. [DOI: 10.1002/cphc.201601416] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Susana P. F. Costa
- LAQV, Requimte, Departamento de Ciências Químicas, Laboratório de Química Aplicada, Faculdade de Farmácia; Universidade do Porto; Rua Jorge Viterbo Ferreira, 228 4050-313 Porto Portugal
| | - Sarah A. P. Pereira
- LAQV, Requimte, Departamento de Ciências Químicas, Laboratório de Química Aplicada, Faculdade de Farmácia; Universidade do Porto; Rua Jorge Viterbo Ferreira, 228 4050-313 Porto Portugal
- Unidade de Investigação para o Desenvolvimento do Interior; Instituto Politécnico da Guarda; Av. Dr. Francisco de Sá Carneiro, n° 50 6300-559 Guarda Portugal
| | - Paula C. A. G. Pinto
- LAQV, Requimte, Departamento de Ciências Químicas, Laboratório de Química Aplicada, Faculdade de Farmácia; Universidade do Porto; Rua Jorge Viterbo Ferreira, 228 4050-313 Porto Portugal
- A3D-Association for Drug Discovery and Development; Rua do Baixeiro n° 38 Aveiro Portugal
| | - André R. T. S. Araujo
- LAQV, Requimte, Departamento de Ciências Químicas, Laboratório de Química Aplicada, Faculdade de Farmácia; Universidade do Porto; Rua Jorge Viterbo Ferreira, 228 4050-313 Porto Portugal
- Unidade de Investigação para o Desenvolvimento do Interior; Instituto Politécnico da Guarda; Av. Dr. Francisco de Sá Carneiro, n° 50 6300-559 Guarda Portugal
| | - Marieta L. C. Passos
- LAQV, Requimte, Departamento de Ciências Químicas, Laboratório de Química Aplicada, Faculdade de Farmácia; Universidade do Porto; Rua Jorge Viterbo Ferreira, 228 4050-313 Porto Portugal
| | - M. Lúcia M. F. S. Saraiva
- LAQV, Requimte, Departamento de Ciências Químicas, Laboratório de Química Aplicada, Faculdade de Farmácia; Universidade do Porto; Rua Jorge Viterbo Ferreira, 228 4050-313 Porto Portugal
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24
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Ledesma J, Pisano PL, Martino DM, Boschetti CE, Bortolato SA. Thymine based copolymers: feasible sensors for the detection of persistent organic pollutants in water. RSC Adv 2017. [DOI: 10.1039/c7ra08868j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
A multidisciplinary approach for understanding properties of thymine-based copolymer sensors.
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Affiliation(s)
- J. Ledesma
- Instituto de Procesos Biotecnológicos y Químicos de Rosario
- CONICET
- Rosario 2000
- Argentina
| | - P. L. Pisano
- Instituto de Química de Rosario
- CONICET
- Rosario 2000
- Argentina
| | - D. M. Martino
- Instituto de Física del Litoral
- CONICET
- Güemes 3450
- Argentina
| | - C. E. Boschetti
- Instituto de Procesos Biotecnológicos y Químicos de Rosario
- CONICET
- Rosario 2000
- Argentina
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25
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Vida AC, Cocovi-Solberg DJ, Zagatto EA, Miró M. Rapid estimation of readily leachable triazine residues in soils using automatic kinetic bioaccessibility assays followed by on-line sorptive clean-up as a front-end to liquid chromatography. Talanta 2016; 156-157:71-78. [DOI: 10.1016/j.talanta.2016.04.062] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Revised: 04/26/2016] [Accepted: 04/29/2016] [Indexed: 11/24/2022]
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26
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Determination of trace zinc in seawater by coupling solid phase extraction and fluorescence detection in the Lab-On-Valve format. Anal Chim Acta 2016; 923:45-54. [DOI: 10.1016/j.aca.2016.03.056] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 03/24/2016] [Accepted: 03/25/2016] [Indexed: 11/22/2022]
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27
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Costa SPF, Martins BSF, Pinto PCAG, Saraiva MLMFS. Automated cytochrome c oxidase bioassay developed for ionic liquids' toxicity assessment. JOURNAL OF HAZARDOUS MATERIALS 2016; 309:165-172. [PMID: 26894289 DOI: 10.1016/j.jhazmat.2016.02.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Revised: 01/01/2016] [Accepted: 02/01/2016] [Indexed: 06/05/2023]
Abstract
A fully automated cytochrome c oxidase assay resorting to sequential injection analysis (SIA) was developed for the first time and implemented to evaluate potential toxic compounds. The bioassay was validated by evaluation of 15 ionic liquids (ILs) with distinct cationic head groups, alkyl side chains and anions. The assay was based on cytochrome c oxidase activity reduction in presence of tested compounds and quantification of inhibitor concentration required to cause 50% of enzyme activity inhibition (EC50). The obtained results demonstrated that enzyme activity was considerably inhibited by BF4 anion and ILs incorporating non-aromatic pyrrolidinium and tetrabutylphosphonium cation cores. Emim [Ac] and chol [Ac], on contrary, presented the higher EC50 values among the ILs tested. The developed automated SIA methodology is a simple and robust high-throughput screening bioassay and exhibited good repeatability in all the tested conditions (rsd<3.7%, n=10). Therefore, it is expected that due to its simplicity and low cost, the developed approach can be used as alternative to traditional screening assays for evaluation of ILs toxicity and identification of possible toxicophore structures. Additionally, the results presented in this study provide further information about ILs toxicity.
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Affiliation(s)
- Susana P F Costa
- LAQV, Requimte, Departamento de Ciências Químicas, Laboratório de Química Aplicada, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, N° 228, 4050-313 Porto, Portugal
| | - Bárbara S F Martins
- LAQV, Requimte, Departamento de Ciências Químicas, Laboratório de Química Aplicada, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, N° 228, 4050-313 Porto, Portugal
| | - Paula C A G Pinto
- LAQV, Requimte, Departamento de Ciências Químicas, Laboratório de Química Aplicada, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, N° 228, 4050-313 Porto, Portugal.
| | - M Lúcia M F S Saraiva
- LAQV, Requimte, Departamento de Ciências Químicas, Laboratório de Química Aplicada, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, N° 228, 4050-313 Porto, Portugal.
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28
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Miranda JL, Mesquita RB, Nunes A, Rangel M, Rangel AO. Iron speciation in natural waters by sequential injection analysis with a hexadentate 3-hydroxy-4-pyridinone chelator as chromogenic agent. Talanta 2016; 148:633-40. [DOI: 10.1016/j.talanta.2015.05.062] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 05/21/2015] [Accepted: 05/25/2015] [Indexed: 11/17/2022]
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29
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Abstract
A dynamic development of methodologies of analytical flow injection measurements during four decades since their invention has reinforced the solid position of flow analysis in the arsenal of techniques and instrumentation of contemporary chemical analysis.
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Affiliation(s)
- Marek Trojanowicz
- Laboratory of Nuclear Analytical Methods
- Institute of Nuclear Chemistry and Technology
- 03-195 Warsaw
- Poland
- Department of Chemistry
| | - Kamila Kołacińska
- Laboratory of Nuclear Analytical Methods
- Institute of Nuclear Chemistry and Technology
- 03-195 Warsaw
- Poland
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30
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Polyaniline/graphene quantum dot-modified screen-printed carbon electrode for the rapid determination of Cr(VI) using stopped-flow analysis coupled with voltammetric technique. Talanta 2015; 150:198-205. [PMID: 26838400 DOI: 10.1016/j.talanta.2015.12.016] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 12/10/2015] [Accepted: 12/10/2015] [Indexed: 11/23/2022]
Abstract
Polyaniline/graphene quantum dots (PANI/GQDs) were used to modify a screen-printed carbon electrode (SPCE) in a flow-based system. A method for rapidly determining the Cr(VI) concentrations by using stopped-flow analysis has been developed using an Auto-Pret system coupled with linear-sweep voltammetry using the PANI/GQD-modified SPCE. The GQDs, synthesized in a botton-up manner from citric acid, were mixed with aniline monomer in an optimized ratio. The mixture was injected into an electrochemical flow cell in which electro-polymerization of the aniline monomer occurred. Under conditions optimized for determining Cr(VI), wide linearity was obtained in the range of 0.1-10 mg L(-1), with a detection limit of 0.097 mg L(-1). For a sample volume of 0.5 m L, the modified SPCE can be used continuously with a sample-throughput of more than 90 samples per hour. In addition, this proposed method was successfully applied to mineral water samples with acceptable accuracy, and the quantitative agreement was accomplished in deteriorated Cr-plating solutions with a standard traditional method for Cr(VI) detection.
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Mesquita RB, Moniz T, Miranda JL, Gomes V, Silva AM, Rodriguez-Borges J, Rangel AO, Rangel M. Synthesis and characterization of a 3-hydroxy-4-pyridinone chelator functionalized with a polyethylene glycol (PEG) chain aimed at sequential injection determination of iron in natural waters. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.09.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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32
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Kaewwonglom N, Jakmunee J. Sequential injection system with multi-parameter analysis capability for water quality measurement. Talanta 2015; 144:755-62. [DOI: 10.1016/j.talanta.2015.07.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Revised: 06/30/2015] [Accepted: 07/03/2015] [Indexed: 10/23/2022]
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Costa SPF, Pinto PCAG, Lapa RAS, Saraiva MLMFS. Toxicity assessment of ionic liquids with Vibrio fischeri: an alternative fully automated methodology. JOURNAL OF HAZARDOUS MATERIALS 2015; 284:136-142. [PMID: 25463227 DOI: 10.1016/j.jhazmat.2014.10.049] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 10/16/2014] [Accepted: 10/31/2014] [Indexed: 06/04/2023]
Abstract
A fully automated Vibrio fischeri methodology based on sequential injection analysis (SIA) has been developed. The methodology was based on the aspiration of 75 μL of bacteria and 50 μL of inhibitor followed by measurement of the luminescence of bacteria. The assays were conducted for contact times of 5, 15, and 30 min, by means of three mixing chambers that ensured adequate mixing conditions. The optimized methodology provided a precise control of the reaction conditions which is an asset for the analysis of a large number of samples. The developed methodology was applied to the evaluation of the impact of a set of ionic liquids (ILs) on V. fischeri and the results were compared with those provided by a conventional assay kit (Biotox(®)). The collected data evidenced the influence of different cation head groups and anion moieties on the toxicity of ILs. Generally, aromatic cations and fluorine-containing anions displayed higher impact on V. fischeri, evidenced by lower EC50. The proposed methodology was validated through statistical analysis which demonstrated a strong positive correlation (P>0.98) between assays. It is expected that the automated methodology can be tested for more classes of compounds and used as alternative to microplate based V. fischeri assay kits.
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Affiliation(s)
- Susana P F Costa
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, n° 228, 4050-313 Porto, Portugal
| | - Paula C A G Pinto
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, n° 228, 4050-313 Porto, Portugal.
| | - Rui A S Lapa
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, n° 228, 4050-313 Porto, Portugal
| | - M Lúcia M F S Saraiva
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, n° 228, 4050-313 Porto, Portugal.
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Pliego J, Mateos JC, Rodriguez J, Valero F, Baeza M, Femat R, Camacho R, Sandoval G, Herrera-López EJ. Monitoring lipase/esterase activity by stopped flow in a sequential injection analysis system using p-nitrophenyl butyrate. SENSORS (BASEL, SWITZERLAND) 2015; 15:2798-811. [PMID: 25633600 PMCID: PMC4367334 DOI: 10.3390/s150202798] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Revised: 12/24/2014] [Accepted: 01/13/2015] [Indexed: 11/25/2022]
Abstract
Lipases and esterases are biocatalysts used at the laboratory and industrial level. To obtain the maximum yield in a bioprocess, it is important to measure key variables, such as enzymatic activity. The conventional method for monitoring hydrolytic activity is to take out a sample from the bioreactor to be analyzed off-line at the laboratory. The disadvantage of this approach is the long time required to recover the information from the process, hindering the possibility to develop control systems. New strategies to monitor lipase/esterase activity are necessary. In this context and in the first approach, we proposed a lab-made sequential injection analysis system to analyze off-line samples from shake flasks. Lipase/esterase activity was determined using p-nitrophenyl butyrate as the substrate. The sequential injection analysis allowed us to measure the hydrolytic activity from a sample without dilution in a linear range from 0.05-1.60 U/mL, with the capability to reach sample dilutions up to 1000 times, a sampling frequency of five samples/h, with a kinetic reaction of 5 min and a relative standard deviation of 8.75%. The results are promising to monitor lipase/esterase activity in real time, in which optimization and control strategies can be designed.
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Affiliation(s)
- Jorge Pliego
- Biotecnología Industrial, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C., Avenida Normalistas 800, Colinas de la Normal. C.P. 44270, Guadalajara Jalisco, Mexico.
| | - Juan Carlos Mateos
- Biotecnología Industrial, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C., Avenida Normalistas 800, Colinas de la Normal. C.P. 44270, Guadalajara Jalisco, Mexico.
| | - Jorge Rodriguez
- Biotecnología Industrial, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C., Avenida Normalistas 800, Colinas de la Normal. C.P. 44270, Guadalajara Jalisco, Mexico.
| | - Francisco Valero
- Departament d'Enginyeria Química, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.
| | - Mireia Baeza
- Departament de Química, Facultat de Ciències, Edifici C-Nord, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.
| | - Ricardo Femat
- Grupo de Biodinámica y Sistemas Alineales, División de Matemáticas Aplicadas, Instituto Potosinode Investigación Científicay Tecnológica. A.C. Camino a la Presa San José 2055, Lomas 4 Sección, C.P. 78216, San Luis Potosí S.L.P., Mexico.
| | - Rosa Camacho
- Biotecnología Industrial, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C., Avenida Normalistas 800, Colinas de la Normal. C.P. 44270, Guadalajara Jalisco, Mexico.
| | - Georgina Sandoval
- Biotecnología Industrial, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C., Avenida Normalistas 800, Colinas de la Normal. C.P. 44270, Guadalajara Jalisco, Mexico.
| | - Enrique J Herrera-López
- Biotecnología Industrial, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C., Avenida Normalistas 800, Colinas de la Normal. C.P. 44270, Guadalajara Jalisco, Mexico.
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35
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Maya F, Palomino Cabello C, Clavijo S, Estela JM, Cerdà V, Turnes Palomino G. Automated growth of metal–organic framework coatings on flow-through functional supports. Chem Commun (Camb) 2015; 51:8169-72. [DOI: 10.1039/c5cc01186h] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal–organic framework coatings on flow-through functional supports were prepared using automated flow-based techniques.
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Affiliation(s)
- F. Maya
- Department of Chemistry
- University of the Balearic Islands
- Palma de Mallorca
- Spain
| | - C. Palomino Cabello
- Department of Chemistry
- University of the Balearic Islands
- Palma de Mallorca
- Spain
| | - S. Clavijo
- Department of Chemistry
- University of the Balearic Islands
- Palma de Mallorca
- Spain
| | - J. M. Estela
- Department of Chemistry
- University of the Balearic Islands
- Palma de Mallorca
- Spain
| | - V. Cerdà
- Department of Chemistry
- University of the Balearic Islands
- Palma de Mallorca
- Spain
| | - G. Turnes Palomino
- Department of Chemistry
- University of the Balearic Islands
- Palma de Mallorca
- Spain
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Santos IC, Mesquita RBR, Bordalo AA, Rangel AOSS. Iodine speciation in coastal and inland bathing waters and seaweeds extracts using a sequential injection standard addition flow-batch method. Talanta 2014; 133:7-14. [PMID: 25435219 DOI: 10.1016/j.talanta.2014.01.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 01/20/2014] [Accepted: 01/21/2014] [Indexed: 11/19/2022]
Abstract
The present work describes the development of a sequential injection standard addition method for iodine speciation in bathing waters and seaweeds extracts without prior sample treatment. Iodine speciation was obtained by assessing the iodide and iodate content, the two inorganic forms of iodine in waters. For the determination of iodide, an iodide ion selective electrode (ISE) was used. The indirect determination of iodate was based on the spectrophotometric determination of nitrite (Griess reaction). For the iodate measurement, a mixing chamber was employed (flow batch approach) to explore the inherent efficient mixing, essential for the indirect determination of iodate. The application of the standard addition method enabled detection limits of 0.14 µM for iodide and 0.02 µM for iodate, together with the direct introduction of the target water samples, coastal and inland bathing waters. The results obtained were in agreement with those obtained by ICP-MS and a colorimetric reference procedure. Recovery tests also confirmed the accuracy of the developed method which was effectively applied to bathing waters and seaweed extracts.
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Affiliation(s)
- Inês C Santos
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Rua Dr. António Bernardino Almeida, 4200-072 Porto, Portugal
| | - Raquel B R Mesquita
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Rua Dr. António Bernardino Almeida, 4200-072 Porto, Portugal; Laboratory of Hydrobiology, Institute of Biomedical Sciences Abel Salazar (ICBAS) and Institute of Marine Research (CIIMAR), Universidade do Porto, Lg. Abel Salazar 2, 4099-003 Porto, Portugal.
| | - Adriano A Bordalo
- Laboratory of Hydrobiology, Institute of Biomedical Sciences Abel Salazar (ICBAS) and Institute of Marine Research (CIIMAR), Universidade do Porto, Lg. Abel Salazar 2, 4099-003 Porto, Portugal
| | - António O S S Rangel
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Rua Dr. António Bernardino Almeida, 4200-072 Porto, Portugal
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Henson CM, Emmert GL, Simone PS. A fully-automated analyzer for determining haloacetic acid concentrations in drinking water. CHEMOSPHERE 2014; 117:586-595. [PMID: 25303464 DOI: 10.1016/j.chemosphere.2014.09.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 09/01/2014] [Accepted: 09/07/2014] [Indexed: 06/04/2023]
Abstract
A fully-automated, on-line, real-time analyzer has been developed for preconcentration and analysis of haloacetic acids (HAAs). Preconcentration of HAAs is achieved by sample acidification and solid phase extraction onto a hydrophobic polymeric resin using sequential injection analysis (SIA). The HAAs preconcentrate is then analyzed using post-column reaction-ion chromatography (PCR-IC), which is selective for HAAs. Systematic optimization of SIA preconcentration parameters are described followed by detailed method detection limit (MDL), accuracy, precision, and linearity studies. MDL values for the individual HAA9 species range from 0.4 to 0.9 μg L(-1). Side-by-side comparison studies of HAAs analysis in 14 real-world drinking water samples from Alabama, Arkansas, Kentucky, Minnesota, Missouri, Mississippi, New York, Pennsylvania and Tennessee are presented that compare the optimized SIA-PCR-IC to USEPA Method 552.3. Trace levels of HAAs detected in select samples are reported, and the bias values calculated between the two methods are typically less than 5 μg L(-1) for eight of the nine individual HAAs.
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Affiliation(s)
- Christina M Henson
- Department of Chemistry, The University of Memphis, Memphis, TN 38152, USA
| | - Gary L Emmert
- Department of Chemistry, The University of Memphis, Memphis, TN 38152, USA
| | - Paul S Simone
- Department of Chemistry, The University of Memphis, Memphis, TN 38152, USA.
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Biscay J, Begoña González García M, García AC. Flow Injection Analysis System Using Magnetic Beads, Screen Printed Electrodes and Magnets. ELECTROANAL 2014. [DOI: 10.1002/elan.201400212] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Costa SPF, Justina VD, Bica K, Vasiloiu M, Pinto PCAG, Saraiva MLMFS. Automated evaluation of pharmaceutically active ionic liquids' (eco)toxicity through the inhibition of human carboxylesterase and Vibrio fischeri. JOURNAL OF HAZARDOUS MATERIALS 2014; 265:133-141. [PMID: 24355776 DOI: 10.1016/j.jhazmat.2013.11.052] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Revised: 11/04/2013] [Accepted: 11/24/2013] [Indexed: 06/03/2023]
Abstract
The toxicity of 16 pharmaceutical active ionic liquids (IL-APIs) was evaluated by automated approaches based on sequential injection analysis (SIA). The implemented bioassays were centered on the inhibition of human carboxylesterase 2 and Vibrio fischeri, in the presence of the tested compounds. The inhibitory effects were quantified by calculating the inhibitor concentration required to cause 50% of inhibition (EC50). The EC50 values demonstrated that the cetylpyridinium group was one of the most toxic cations and that the imidazolium group was the less toxic. The obtained results provide important information about the safety of the studied IL-APIs and their possible use as pharmaceutical drugs. The developed automated SIA methodologies are robust screening bioassays, and can be used as a generic tools to identify the (eco)toxicity of the structural elements of ILs, contributing to a sustainable development of drugs.
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Affiliation(s)
- Susana P F Costa
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, n° 228, 4050-313 Porto, Portugal
| | - Vanessa D Justina
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, n° 228, 4050-313 Porto, Portugal
| | - Katharina Bica
- Vienna University of Technology, Institute of Applied and Synthetic Chemistry, A-1060 Vienna, Austria
| | - Maria Vasiloiu
- Vienna University of Technology, Institute of Applied and Synthetic Chemistry, A-1060 Vienna, Austria
| | - Paula C A G Pinto
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, n° 228, 4050-313 Porto, Portugal.
| | - M Lúcia M F S Saraiva
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, n° 228, 4050-313 Porto, Portugal.
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Anthemidis AN, Kalogiouri NP. Advances in On-Line Hydride Generation Atomic Spectrometric Determination of Arsenic. ANAL LETT 2013. [DOI: 10.1080/00032719.2012.755691] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Kim CK, Duong HD, Rhee JI. Sequential injection immunoassay for human bone morphogenic protein-7 using an immunoreactor immobilized with anti-human bone morphogenic protein-7 antibody--CdSe/ZnS quantum dot conjugates. Anal Chim Acta 2013; 786:78-84. [PMID: 23790295 DOI: 10.1016/j.aca.2013.05.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Revised: 05/07/2013] [Accepted: 05/11/2013] [Indexed: 11/25/2022]
Abstract
The detection of human bone morphogenic protein-7 (BMP-7) was achieved using a sequential injection immunoassay (SIIA) system. The SIIA system is based on the binding between BMP-7 and anti-human BMP-7 (AbBMP7)-CdSe/ZnS quantum dot (QD) conjugates immobilized onto a glass disk or an optical fiber, using fluorescence detection at excitation and emission wavelengths of 470 nm and 580 nm, respectively. The AbBMP7-QD conjugates were prepared by conjugating anti-human BMP-7 antibody (AbBMP7) to hydrophilic CdSe/ZnS core/shell quantum dots (QDs). The SIIA system was fully automated using software written in the LabVIEW™ development environment. The analytical performance of the SIIA system was characterized with a number of variables such as carrier flow rate and elution buffer. Under partially optimized operating conditions, the SIIA system had a linear calibration graph at up to 10.0 ng mL(-1) BMP-7 (R(2)≥0.975) and a sample frequency of two samples per hour. The SIIA system with an optical fiber immunosensor was used to detect and quantify BMP-7 in spiked real samples obtained from a biological process with recoveries in the range of 95-102%.
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Affiliation(s)
- Chun-Kwang Kim
- School of Applied Chemical Engineering, Research Center for Biophotonics, Chonnam National University, YongBong-dong 300, GwangJu, Republic of Korea
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Horstkotte B, Suárez R, Solich P, Cerdà V. In-syringe-stirring: A novel approach for magnetic stirring-assisted dispersive liquid–liquid microextraction. Anal Chim Acta 2013; 788:52-60. [DOI: 10.1016/j.aca.2013.05.049] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 05/16/2013] [Accepted: 05/25/2013] [Indexed: 11/26/2022]
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Santos IC, Mesquita RB, Machado A, Bordalo AA, Rangel AO. Sequential injection methodology for carbon speciation in bathing waters. Anal Chim Acta 2013; 778:38-47. [DOI: 10.1016/j.aca.2013.03.043] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Revised: 03/07/2013] [Accepted: 03/16/2013] [Indexed: 10/27/2022]
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Mesquita RB, Suárez R, Cerdà V, Rangel M, Rangel AO. Exploiting the use of 3,4-HPO ligands as nontoxic reagents for the determination of iron in natural waters with a sequential injection approach. Talanta 2013; 108:38-45. [DOI: 10.1016/j.talanta.2013.02.058] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 02/21/2013] [Accepted: 02/23/2013] [Indexed: 11/26/2022]
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45
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Fluorescence and Phosphorescence Chemical Sensors Applied to Water Samples. SMART SENSORS, MEASUREMENT AND INSTRUMENTATION 2013. [DOI: 10.1007/978-3-642-37006-9_3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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Santos IC, Mesquita RB, Bordalo AA, Rangel AO. Use of solid phase extraction for the sequential injection determination of alkaline phosphatase activity in dynamic water systems. Talanta 2012; 98:203-10. [DOI: 10.1016/j.talanta.2012.06.071] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Revised: 06/20/2012] [Accepted: 06/25/2012] [Indexed: 11/26/2022]
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Santos IC, Mesquita RBR, Galvis-Sánchez AC, Delgadillo I, Rangel AOSS. Development of a Turbidimetric Sequential Injection System to Monitor the Codfish Desalting Process. FOOD ANAL METHOD 2012. [DOI: 10.1007/s12161-011-9238-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Anthemidis AN, Tsartsidou MS, Stratis JA. Sequential Injection On-Line Sorption Preconcentration Using PEEK-Turnings Packed Micro-Column for Ultra-Trace Cobalt Determination by Electrothermal Atomic Absorption Spectrometry. ANAL LETT 2012. [DOI: 10.1080/00032719.2011.649449] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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