51
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Lima MJ, Reis BF. A clean photometric method for the determination of losartan potassium in pharmaceuticals exploiting light scattering effect and employing a multicommuted flow analysis approach. Talanta 2017; 164:183-188. [DOI: 10.1016/j.talanta.2016.11.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 11/04/2016] [Accepted: 11/05/2016] [Indexed: 10/20/2022]
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52
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Agustini D, Bergamini MF, Marcolino-Junior LH. Characterization and optimization of low cost microfluidic thread based electroanalytical device for micro flow injection analysis. Anal Chim Acta 2017; 951:108-115. [DOI: 10.1016/j.aca.2016.11.046] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 11/16/2016] [Indexed: 10/20/2022]
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53
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CORENO-ALONSO A, CRUZ-JIMENEZ G, LÓPEZ-MARTINEZ L, REYNA-LÓPEZ GE, ACEVEDO-AGUILAR FJ. A rapid, eco-friendly, and reliable microplate method for determination of Cr(VI). Turk J Chem 2017. [DOI: 10.3906/kim-1609-53] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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54
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Tischer B, Oliveira AS, Ferreira DDF, Menezes CR, Duarte FA, Wagner R, Barin JS. Rapid microplate, green method for high-throughput evaluation of vinegar acidity using thermal infrared enthalpimetry. Food Chem 2017; 215:17-21. [DOI: 10.1016/j.foodchem.2016.07.127] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 07/21/2016] [Accepted: 07/21/2016] [Indexed: 01/31/2023]
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55
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Silva DS, Reis BF. Evaluation of the schlieren effect employing a LED-based photometer with a long-pathlength flow cell for reagentless photometric determination of ethanol in distilled ethanolic beverages. Microchem J 2016. [DOI: 10.1016/j.microc.2016.07.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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56
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do Lago AC, Marchioni C, Mendes TV, Wisniewski C, Fadini PS, Luccas PO. Ion Imprinted Polymer for Preconcentration and Determination of Ultra-Trace Cadmium, Employing Flow Injection Analysis with Thermo Spray Flame Furnace Atomic Absorption Spectrometry. APPLIED SPECTROSCOPY 2016; 70:1842-1850. [PMID: 27449370 DOI: 10.1177/0003702816658669] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Accepted: 01/04/2016] [Indexed: 06/06/2023]
Abstract
This work proposes a preconcentration method using an ion imprinted polymer (IIP) for determination of cadmium, in several samples, employing a mini-column filled with the polymer coupled into a flow injection analysis system with detection by thermospray flame furnace atomic absorption spectrometry (FIA-TS-FF-AAS). The polymer was synthesized via bulk using methacrylic acid and vinylimidazole as a functional monomer. For the FIA system initial assessment, the variables: pH, eluent concentration and buffer concentration were studied, employing a 23 full factorial design. To obtain the optimum values for each significant variable, a Doehlert matrix was employed. After the optimization conditions as: pH 5.8, eluent (HNO3) concentration of 0.48 mol L-1 and buffer concentration of 0.01 mol L-1, were adopted. The proposed method showed a linear response in the range of 0.081-10.0 μg L-1, limits detection and quantification of 0.024 and 0.081 μg L-1, respectively; preconcentration factor of 165, consumptive index of 0.06 mL, concentration efficiency 132 min-1, and frequency of readings equal to 26 readings h-1 The accuracy was checked by analysis of certified reference materials for trace metals and recovery tests. The obtained results were in agreement with 95% confidence level (t-test). The method was adequate to apply in samples of: jewelry (earrings) (2.38 ± 0.28 μg kg-1), black tea (1.09 ± 0.15 μg kg-1), green tea (3.85 ± 0.13 μg kg-1), cigarette tobacco (38.27 ± 0.22 μg kg-1), and hair (0.35 ± 0.02 μg kg-1).
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Affiliation(s)
- Ayla Campos do Lago
- Universidade Federal de São Carlos (UFSCar-SP), Departamento de Química, São Carlos, SP, Brazil
| | - Camila Marchioni
- Universidade Federal de Alfenas (UNIFAL-MG), Instituto de Química, Alfenas, MG, Brazil
| | - Tássia Venga Mendes
- Universidade Federal de Alfenas (UNIFAL-MG), Instituto de Química, Alfenas, MG, Brazil
| | - Célio Wisniewski
- Universidade Federal de Alfenas (UNIFAL-MG), Instituto de Química, Alfenas, MG, Brazil
| | - Pedro Sergio Fadini
- Universidade Federal de São Carlos (UFSCar-SP), Departamento de Química, São Carlos, SP, Brazil
| | - Pedro Orival Luccas
- Universidade Federal de Alfenas (UNIFAL-MG), Instituto de Química, Alfenas, MG, Brazil
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57
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Néri-Quiroz J, Canto F, Guillerme L, Couston L, Magnaldo A, Dugas V. Miniaturizing and automation of free acidity measurements for uranium (VI)-HNO3 solutions: Development of a new sequential injection analysis for a sustainable radio-analytical chemistry. Talanta 2016; 159:330-335. [PMID: 27474315 DOI: 10.1016/j.talanta.2016.06.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 06/13/2016] [Accepted: 06/19/2016] [Indexed: 11/16/2022]
Abstract
A miniaturized and automated approach for the determination of free acidity in solutions containing uranium (VI) is presented. The measurement technique is based on the concept of sequential injection analysis with on-line spectroscopic detection. The proposed methodology relies on the complexation and alkalimetric titration of nitric acid using a pH 5.6 sodium oxalate solution. The titration process is followed by UV/VIS detection at 650nm thanks to addition of Congo red as universal pH indicator. Mixing sequence as well as method validity was investigated by numerical simulation. This new analytical design allows fast (2.3min), reliable and accurate free acidity determination of low volume samples (10µL) containing uranium/[H(+)] moles ratio of 1:3 with relative standard deviation of <7.0% (n=11). The linearity range of the free nitric acid measurement is excellent up to 2.77molL(-1) with a correlation coefficient (R(2)) of 0.995. The method is specific, presence of actinide ions up to 0.54molL(-1) does not interfere on the determination of free nitric acid. In addition to automation, the developed sequential injection analysis method greatly improves the standard off-line oxalate complexation and alkalimetric titration method by reducing thousand fold the required sample volume, forty times the nuclear waste per analysis as well as the analysis time by eight fold. These analytical parameters are important especially in nuclear-related applications to improve laboratory safety, personnel exposure to radioactive samples and to drastically reduce environmental impacts or analytical radioactive waste.
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Affiliation(s)
- José Néri-Quiroz
- CEA Nuclear Energy Division, Radiochemistry & Processes Department, Marcoule, F-30207 Bagnols-sur-Cèze, France
| | - Fabrice Canto
- CEA Nuclear Energy Division, Radiochemistry & Processes Department, Marcoule, F-30207 Bagnols-sur-Cèze, France
| | - Laurent Guillerme
- CEA Nuclear Energy Division, Radiochemistry & Processes Department, Marcoule, F-30207 Bagnols-sur-Cèze, France
| | - Laurent Couston
- CEA Nuclear Energy Division, Radiochemistry & Processes Department, Marcoule, F-30207 Bagnols-sur-Cèze, France
| | - Alastair Magnaldo
- CEA Nuclear Energy Division, Radiochemistry & Processes Department, Marcoule, F-30207 Bagnols-sur-Cèze, France
| | - Vincent Dugas
- Université de Lyon, Institut des Sciences Analytiques, UMR 5280, CNRS, Université Lyon 1, ENS Lyon - 5, rue de la Doua, F-69100 Villeurbanne, France.
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58
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Vakh C, Falkova M, Timofeeva I, Moskvin A, Moskvin L, Bulatov A. Flow Analysis: A Novel Approach For Classification. Crit Rev Anal Chem 2016; 46:374-88. [DOI: 10.1080/10408347.2015.1087301] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Christina Vakh
- Department of Analytical Chemistry, Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
| | - Marina Falkova
- Department of Analytical Chemistry, Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
| | - Irina Timofeeva
- Department of Analytical Chemistry, Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
| | - Alexey Moskvin
- Department of Analytical Chemistry, Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
| | - Leonid Moskvin
- Department of Analytical Chemistry, Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
| | - Andrey Bulatov
- Department of Analytical Chemistry, Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
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59
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60
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Masini JC. Semi-micro reversed-phase liquid chromatography for the separation of alkyl benzenes and proteins exploiting methacrylate- and polystyrene-based monolithic columns. J Sep Sci 2016; 39:1648-55. [DOI: 10.1002/jssc.201600049] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 02/27/2016] [Accepted: 02/29/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Jorge Cesar Masini
- Departamento de Química Fundamental, Instituto de Química; Universidade de São Paulo; São Paulo SP Brazil
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61
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Shishov A, Zabrodin A, Moskvin L, Andruch V, Bulatov A. Interfacial reaction using particle-immobilized reagents in a fluidized reactor. Determination of glycerol in biodiesel. Anal Chim Acta 2016; 914:75-80. [DOI: 10.1016/j.aca.2016.02.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 12/29/2015] [Accepted: 02/02/2016] [Indexed: 10/22/2022]
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62
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Vakh C, Pochivalov A, Andruch V, Moskvin L, Bulatov A. A fully automated effervescence-assisted switchable solvent-based liquid phase microextraction procedure: Liquid chromatographic determination of ofloxacin in human urine samples. Anal Chim Acta 2016; 907:54-9. [DOI: 10.1016/j.aca.2015.12.004] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 12/10/2015] [Accepted: 12/13/2015] [Indexed: 11/30/2022]
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63
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Nalewajko-Sieliwoniuk E, Iwanowicz M, Kalinowski S, Kojło A. Application of direct-injection detector integrated with the multi-pumping flow system to chemiluminescence determination of the total polyphenol index. Anal Chim Acta 2016; 911:82-91. [PMID: 26893089 DOI: 10.1016/j.aca.2016.01.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 12/22/2015] [Accepted: 01/24/2016] [Indexed: 10/22/2022]
Abstract
In this work, we present a novel chemiluminescence (CL) method based on direct-injection detector (DID) integrated with the multi-pumping flow system (MPFS) to chemiluminescence determination of the total polyphenol index. In this flow system, the sample and the reagents are injected directly into the cone-shaped detection cell placed in front of the photomultiplier window. Such construction of the detection chamber allows for fast measurement of the CL signal in stopped-flow conditions immediately after mixing the reagents. The proposed DID-CL-MPFS method is based on the chemiluminescence of nanocolloidal manganese(IV)-hexametaphosphate-ethanol system. The application of ethanol as a sensitizer, eliminated the use of carcinogenic formaldehyde. Under the optimized experimental conditions, the chemiluminescence intensities are proportional to the concentration of gallic acid in the range from 5 to 350 ng mL(-1). The DID-CL-MPFS method offers a number of advantages, including low limit of detection (0.80 ng mL(-1)), high precision (RSD = 3.3%) and high sample throughput (144 samples h(-1)) as well as low consumption of reagents, energy and low waste generation. The proposed method has been successfully applied to determine the total polyphenol index (expressed as gallic acid equivalent) in a variety of plant-derived food samples (wine, tea, coffee, fruit and vegetable juices, herbs, spices).
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Affiliation(s)
- Edyta Nalewajko-Sieliwoniuk
- Department of Analytical Chemistry, Institute of Chemistry, University of Białystok, Hurtowa 1, 15-399 Białystok, Poland.
| | - Magdalena Iwanowicz
- Department of Analytical Chemistry, Institute of Chemistry, University of Białystok, Hurtowa 1, 15-399 Białystok, Poland
| | - Sławomir Kalinowski
- Department of Chemistry, University of Warmia and Mazury, 10-957 Olsztyn, Poland
| | - Anatol Kojło
- Department of Analytical Chemistry, Institute of Chemistry, University of Białystok, Hurtowa 1, 15-399 Białystok, Poland
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64
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de Assis SGF, de Andrade MF, Montenegro MCBSM, dos Reis BF, Paim APS. Determination of Polyphenol Content by Formation of Unstable Compound Using a Mini-Pump Multicommutation System. FOOD ANAL METHOD 2016. [DOI: 10.1007/s12161-016-0411-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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65
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Zargar B, Pourreza N, Bayat E, Hatamie A. Zein bio-nanoparticles: a novel green nanopolymer as a dispersive solid-phase extraction adsorbent for separating and determining trace amounts of azorubine in different foodstuffs. RSC Adv 2016. [DOI: 10.1039/c6ra09027c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new, easy, and green method using zein nanoparticles as a dispersive solid-phase extraction (DSPE) adsorbent has been used for the preconcentration of azorubine (a well-known chemical dye additive) as a model compound in foodstuffs.
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Affiliation(s)
- Behrooz Zargar
- Department of Chemistry
- Faculty of Sciences
- Shahid Chamran University of Ahvaz
- Ahvaz
- Iran
| | - Nahid Pourreza
- Department of Chemistry
- Faculty of Sciences
- Shahid Chamran University of Ahvaz
- Ahvaz
- Iran
| | - Elahe Bayat
- Department of Chemistry
- Faculty of Sciences
- Shahid Chamran University of Ahvaz
- Ahvaz
- Iran
| | - Amir Hatamie
- Department of Chemistry
- Faculty of Sciences
- Shahid Chamran University of Ahvaz
- Ahvaz
- Iran
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66
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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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67
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Lara-Ortega FJ, Sainz-Gonzalo FJ, Gilbert-López B, García-Reyes JF, Molina-Díaz A. Multicommuted flow injection method for fast photometric determination of phenolic compounds in commercial virgin olive oil samples. Talanta 2016; 147:531-6. [DOI: 10.1016/j.talanta.2015.10.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 10/05/2015] [Accepted: 10/06/2015] [Indexed: 01/18/2023]
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68
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Medinskaia K, Garmonov S, Kozak J, Wieczorek M, Andruch V, Kościelniak P, Bulatov A. Stepwise injection determination of isoniazid in human urine samples coupled with generalized calibration method. Microchem J 2015. [DOI: 10.1016/j.microc.2015.05.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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69
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Rocha DL, Kamogawa MY, Rocha FR. A critical review on photochemical conversions in flow analysis. Anal Chim Acta 2015; 896:11-33. [DOI: 10.1016/j.aca.2015.09.027] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 09/10/2015] [Accepted: 09/11/2015] [Indexed: 01/26/2023]
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70
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González P, Knochen M, Sasaki MK, Zagatto EA. Pulsed flows in flow analysis: Potentialities, limitations and applications. Talanta 2015; 143:419-430. [DOI: 10.1016/j.talanta.2015.05.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 05/04/2015] [Accepted: 05/05/2015] [Indexed: 10/23/2022]
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71
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Lago ACD, de Lima GC, Wisniewski C, do Nascimento MRL, Fadini PS, Luccas PO. Determination of Uranium in Environmental Water by Flow Injection Analysis using a Hybrid-Imprinted Polymer. ANAL LETT 2015. [DOI: 10.1080/00032719.2015.1046550] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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72
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Lima MJA, Fernandes RN, Tanaka AA, Reis BF. Development of a new procedure for the determination of captopril in pharmaceutical formulations employing chemiluminescence and a multicommuted flow analysis approach. LUMINESCENCE 2015; 31:288-94. [PMID: 26136382 DOI: 10.1002/bio.2960] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 05/12/2015] [Accepted: 05/15/2015] [Indexed: 01/07/2023]
Abstract
This paper describes a new technique for the determination of captopril in pharmaceutical formulations, implemented by employing multicommuted flow analysis. The analytical procedure was based on the reaction between hypochlorite and captopril. The remaining hypochlorite oxidized luminol that generated electromagnetic radiation detected using a homemade luminometer. To the best of our knowledge, this is the first time that this reaction has been exploited for the determination of captopril in pharmaceutical products, offering a clean analytical procedure with minimal reagent usage. The effectiveness of the proposed procedure was confirmed by analyzing a set of pharmaceutical formulations. Application of the paired t-test showed that there was no significant difference between the data sets at a 95% confidence level. The useful features of the new analytical procedure included a linear response for captopril concentrations in the range 20.0-150.0 µmol/L (r = 0.997), a limit of detection (3σ) of 2.0 µmol/L, a sample throughput of 164 determinations per hour, reagent consumption of 9 µg luminol and 42 µg hypochlorite per determination and generation of 0.63 mL of waste. A relative standard deviation of 1% (n = 6) for a standard solution containing 80 µmol/L captopril was also obtained.
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Affiliation(s)
- Manoel J A Lima
- Departamento de Química, Universidade Federal do Maranhão, São Luís, Brazil
| | - Ridvan N Fernandes
- Departamento de Química, Universidade Federal do Maranhão, São Luís, Brazil
| | - Auro A Tanaka
- Departamento de Química, Universidade Federal do Maranhão, São Luís, Brazil
| | - Boaventura F Reis
- Centro de Energia Nuclear na Agricultura, Universidade de São Paulo, Piracicaba, Brazil
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73
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Synthesis and characterization of functionalized silica with 3,6-ditia-1,8-octanediol for the preconcentration and determination of lead in milk employing multicommuted flow system coupled to FAAS. J Food Compost Anal 2015. [DOI: 10.1016/j.jfca.2014.12.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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74
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Kondylis P, Barbatsi M, Economou A. Automated Flow Injection Chromatography for the Rapid Assay of Parabens in Hygiene Wipes. ANAL LETT 2015. [DOI: 10.1080/00032719.2015.1017763] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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75
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Batista AD, Chocholouš P, Šatínský D, Solich P, Rocha FR. On-line hyphenation of solid-phase extraction to chromatographic separation of sulfonamides with fused-core columns in sequential injection chromatography. Talanta 2015; 133:142-9. [DOI: 10.1016/j.talanta.2014.07.056] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Revised: 07/14/2014] [Accepted: 07/21/2014] [Indexed: 10/25/2022]
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76
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Falkova MT, Bulatov AV, Pushina MO, Ekimov AA, Alekseeva GM, Moskvin LN. Multicommutated stepwise injection determination of ascorbic acid in medicinal plants and food samples by capillary zone electrophoresis ultraviolet detection. Talanta 2015; 133:82-7. [DOI: 10.1016/j.talanta.2014.04.092] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 04/04/2014] [Accepted: 04/21/2014] [Indexed: 11/16/2022]
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77
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Evaluation of sequential injection chromatography for reversed phase separation of triazine herbicides exploiting monolithic and core–shell columns. Talanta 2015; 131:528-34. [DOI: 10.1016/j.talanta.2014.08.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Revised: 08/05/2014] [Accepted: 08/06/2014] [Indexed: 11/23/2022]
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78
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Razuc MF, Grünhut M, Garrido M, Fernández Band BS. Second order advantage applied to the spectrophotometric analysis of ciprofloxacin and dexamethasone in ophthalmic drops; automatic green method using on-line photodegradation. ANAL SCI 2014; 30:1121-7. [PMID: 25492460 DOI: 10.2116/analsci.30.1121] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
On-line photodegradation and spectrophotometric analysis assisted by multivariate curve resolution-alternating least squares (MCR-ALS) was developed the simultaneous determination of ciprofloxacin (CIP) and dexamethasone (DEX) in ophthalmic suspensions using an automated flow-batch analysis (FBA) system. CIP and DEX have strongly overlapped UV spectra. Overcoming this lack of selectivity involves augmenting data dimensionality. This could be performed by adding information about the sample photodegradation to obtain the so-called second order advantage. Commercial sample analysis was successfully performed and no statistical differences (α = 0.05) with respect to pharmacopeia methods were obtained. The proposed method offers several advantages over the methods developed to date. In agreement with the principles of green chemistry, only water was used as solvent, low amounts of waste were generated and on-line waste treatment was included in the system. Moreover, the cost per analysis was significantly reduced compared to methods that employ separative techniques.
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Affiliation(s)
- Mariela F Razuc
- Laboratory of Flow Injection Analysis, INQUISUR (Universidad Nacional del Sur-CONICET)
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79
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de Souza GCS, Bezerra da Silva PA, Leotério DMDS, Paim APS, Lavorante AF. A multicommuted flow system for fast screening/sequential spectrophotometric determination of dichromate, salicylic acid, hydrogen peroxide and starch in milk samples. Food Control 2014. [DOI: 10.1016/j.foodcont.2014.05.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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80
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Rocha DL, Machado MC, Melchert WR. A sensitive flow-based procedure for spectrophotometric speciation analysis of inorganic bromine in waters. Talanta 2014; 129:93-9. [PMID: 25127569 DOI: 10.1016/j.talanta.2014.05.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 04/11/2014] [Accepted: 05/11/2014] [Indexed: 11/18/2022]
Abstract
A flow-based system with solenoid micro-pumps and long path-length spectrophotometry for bromate and bromide determination in drinking water is proposed. The method is based on the formation of an unstable dye from the reaction between bromate, 2-(5-dibromo-2-pyridylazo)-5-(diethylamino)phenol (5-Br-PADAP) and thiocyanate ions. A multivariate optimization was carried out. A linear response was observed between 5.0 and 100 µg L(-1) BrO3(-) and the detection limit was estimated as 2.0 µg L(-1) (99.7% confidence level). The coefficient of variation (n=20) and sampling rate were estimated as 1.0% and 40 determinations per hour, respectively. Reagent consumption was estimated as 0.17 µg of 5-Br-PADAP and 230 μg of NaSCN per measurement, generating 6.0 mL of waste. Bromide determination was carried out after UV-assisted conversion with K2S2O8 using 300 µL of sample within the range 20-400 µg L(-1) Br(-). The generated bromate was then determined by the proposed flow system. The results for tap and commercial mineral water samples agreed with those obtained with the reference procedure at the 95% confidence level. The proposed procedure is therefore a sensitive, environmentally friendly and reliable alternative for inorganic bromine speciation.
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Affiliation(s)
- Diogo L Rocha
- Centro de Energia Nuclear na Agricultura, Universidade de São Paulo, PO Box 96, 13400-970, Piracicaba, SP, Brazil
| | - Marcos C Machado
- Centro de Energia Nuclear na Agricultura, Universidade de São Paulo, PO Box 96, 13400-970, Piracicaba, SP, Brazil
| | - Wanessa R Melchert
- Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, PO Box 9, 13418-970, Piracicaba, SP, Brazil.
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81
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Pereira AC, Rocha FRP. Liquid-liquid microextraction in a multicommuted flow system for direct spectrophotometric determination of iodine value in biodiesel. Anal Chim Acta 2014; 829:28-32. [PMID: 24856399 DOI: 10.1016/j.aca.2014.04.049] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Revised: 04/18/2014] [Accepted: 04/21/2014] [Indexed: 11/25/2022]
Abstract
A flow-based procedure was developed for the direct spectrophotometric determination of the iodine value (IV) in biodiesel. The procedure was based on the microextraction/reaction of unsaturated compounds with triiodide ions in an aqueous medium by inserting the reagent solution between the aliquots of biodiesel without any pretreatment. The interaction occurred through the biodiesel film formed on the inner walls of the hydrophobic tube used as the reactor and at the aqueous/biodiesel interfaces. The spectrophotometric detection was based on the discoloration of the I3(-) reagent in the aqueous phase by using a glass tube coupled to a fiber-optic spectrophotometer as the detection cell. Reference solutions were prepared by dilution of biodiesel samples with previously determined IV in hexane. The analytical response was linear for IV from 13 to 135 g I2/100 g with a detection limit of 5 g I2/100 g. A coefficient of variation of 1.7% (n=10) and a sampling rate of 108 determinations per hour were achieved by consuming 224 μL of the sample and 200 μg of I2 per determination. The slopes of analytical curves obtained with three different biodiesel samples were in agreement (variations in slopes lower than 3.1%), thus indicating an absence of any matrix effects. Results for biodiesel samples from different sources agreed with the volumetric official procedure at the 95% confidence level. The proposed procedure is therefore a simple, fast, and reliable alternative for estimating the iodine value of biodiesel.
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Affiliation(s)
- Andréia C Pereira
- Centro de Energia Nuclear na Agricultura, Universidade de São Paulo, P.O. Box 96, Piracicaba, SP 13400-970, Brazil
| | - Fábio R P Rocha
- Centro de Energia Nuclear na Agricultura, Universidade de São Paulo, P.O. Box 96, Piracicaba, SP 13400-970, Brazil.
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82
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SANTANA JFSD, BELIAN MF, LAVORANTE AF. A Spectrophotometric Procedure for Malic Acid Determination in Wines Employing a Multicommutation Approach. ANAL SCI 2014; 30:657-61. [DOI: 10.2116/analsci.30.657] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
| | - Mônica F. BELIAN
- Departamento de Ciências Moleculares, Universidade Federal Rural de Pernambuco
| | - André F. LAVORANTE
- Departamento de Ciências Moleculares, Universidade Federal Rural de Pernambuco
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83
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Batista AD, Sasaki MK, Rocha FRP, Zagatto EAG. Flow analysis in Brazil: contributions over the last four decades. Analyst 2014; 139:3666-82. [DOI: 10.1039/c4an00295d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Timeline with the main contributions of Brazilian researchers to flow analysis.
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Affiliation(s)
- Alex D. Batista
- Centro de Energia Nuclear na Agricultura
- Universidade de São Paulo
- Piracicaba, Brazil
| | - Milton K. Sasaki
- Centro de Energia Nuclear na Agricultura
- Universidade de São Paulo
- Piracicaba, Brazil
| | - Fábio R. P. Rocha
- Centro de Energia Nuclear na Agricultura
- Universidade de São Paulo
- Piracicaba, Brazil
| | - Elias A. G. Zagatto
- Centro de Energia Nuclear na Agricultura
- Universidade de São Paulo
- Piracicaba, Brazil
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84
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Oelgemöller M, Hoffmann N, Shvydkiv O. From 'Lab & Light on a Chip' to Parallel Microflow Photochemistry. Aust J Chem 2014. [DOI: 10.1071/ch13591] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Continuous-flow microreactors offer major advantages for photochemical applications. This mini-review summarizes the technological development of microflow devices in the Applied and Green Photochemistry Group at James Cook University, and its associates, from fixed microchips for microscale synthesis to flexible multicapillary systems for parallel photochemistry. Whereas the enclosed microchip offered high space–time-yields, the open capillary-type reactor showed a greater potential for further modifications. Consequently, a 10-microcapillary reactor was constructed and used successfully for process optimization, reproducibility studies, scale-up, and library synthesis. To demonstrate the superiority of microflow photochemistry over conventional batch processes, the reactors were systematically evaluated using alcohol additions to furanones as model reactions. In all cases, the microreactor systems furnished faster conversions, improved product qualities, and higher yields. UVC-induced [2+2] cycloadditions of furanone with alkenes were exemplarily examined in a capillary reactor, thus proving the broad applicability of this reactor type.
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85
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Bachollet S, Terao K, Aida S, Nishiyama Y, Kakiuchi K, Oelgemöller M. Microflow photochemistry: UVC-induced [2 + 2]-photoadditions to furanone in a microcapillary reactor. Beilstein J Org Chem 2013; 9:2015-21. [PMID: 24204412 PMCID: PMC3817530 DOI: 10.3762/bjoc.9.237] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2013] [Accepted: 09/10/2013] [Indexed: 11/27/2022] Open
Abstract
[2 + 2]-Cycloadditions of cyclopentene and 2,3-dimethylbut-2-ene to furanone were investigated under continuous-flow conditions. Irradiations were conducted in a FEP-microcapillary module which was placed in a Rayonet chamber photoreactor equipped with low wattage UVC-lamps. Conversion rates and isolated yields were compared to analogue batch reactions in a quartz test tube. In all cases examined, the microcapillary reactor furnished faster conversions and improved product qualities.
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Affiliation(s)
- Sylvestre Bachollet
- James Cook University, School of Pharmacy and Molecular Sciences, Townsville, QLD 4811, Australia
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86
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Green method based on a flow-batch analyzer system for the simultaneous determination of ciprofloxacin and dexamethasone in pharmaceuticals using a chemometric approach. Talanta 2013; 115:314-22. [DOI: 10.1016/j.talanta.2013.05.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Revised: 04/29/2013] [Accepted: 05/01/2013] [Indexed: 11/23/2022]
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87
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88
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89
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Fulmes CS, Bulatov AV, Yasakova OG, Freze EA, Moskvin AN, Dedkov YM, Moskvin LN. Multicommutated Stepwise Injection Analysis as new approach for simultaneous determination of nickel (II), copper (II) and zinc (II) in wet aerosols. Microchem J 2013. [DOI: 10.1016/j.microc.2013.06.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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90
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Palomeque ME, Ortiz PI. Water-Soluble Humic Acid Quantification Using a Flow-Injection System with and without Sample Pretreatment. Ind Eng Chem Res 2013. [DOI: 10.1021/ie400980u] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Miriam E. Palomeque
- Departamento
de Quı́mica, Facultad de Ciencias Exactas, Fı́sicas
y Naturales, Universidad Nacional de Córdoba, CICTERRA-CONICET, Ciudad Universitaria, X5016GCA Córdoba, Argentina
| | - Patricia I. Ortiz
- Departamento
de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, INFIQC-CONICET, Ciudad Universitaria, X5000HUA Córdoba, Argentina
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91
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Soares VRB, Rocha FRP, Teixeira LSG. Contributions of Flow Analysis for Quality Control of Automotive Fuels: A Review. ANAL LETT 2013. [DOI: 10.1080/00032719.2012.747095] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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92
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Tejedor AMG, Picó AG, Hernando PF, Durand Alegría JS. Study of On-Line Fluorimetric Determination of Oxazepam. Application to the Screening of 1,4-Benzodiazepines Giving Oxazepam as Metabolite in Urine. ANAL LETT 2013. [DOI: 10.1080/00032719.2012.717239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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93
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Abstract
The philosophy of green chemistry has been very well received in Latin America’s
research and development programs. In this review we describe the green
chemistry contributions of Brazilian research groups over the last three
years.
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94
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Insain P, Khonyoung S, Sooksamiti P, Lapanantnoppakhun S, Jakmunee J, Grudpan K, Zajicek K, Kradtap Hartwell S. Green analytical methodology using Indian almond (Terminalia catappa L.) leaf extract for determination of aluminum ion in waste water from ceramic factories. ANAL SCI 2013; 29:655-9. [PMID: 23749133 DOI: 10.2116/analsci.29.655] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The use of natural reagents from plant extracts for chemical analysis is one of the approaches in the development of low cost and environmentally friendly green analytical chemistry methodology. Here, crude extract from Indian Almond (Terminalia Catappa L.) leaves was used for colorimetric determination of aluminum by monitoring the absorbance of the Al(3+)-extract complex at 435 nm. Dry leaves and freeze-dried fresh leaf extract can be kept for extended use. A simple flow injection analysis (FIA) system was also employed for rapid analysis (approximately 180 injections/h). The linear working range up to 100 mg L(-1) was established with a detection limit (blank + 3SD) of 0.8 mg L(-1), a limit of quantitation (blank + 10SD) of 2.4 mg L(-1), and a relative standard deviation of 3-5%. This simple green analytical chemistry methodology was applied for the determination of Al(3+) in waste water samples from ceramic factories. The results agreed well with the results obtained from the ICP-OES technique.
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Affiliation(s)
- Pimporn Insain
- Department of Chemistry, Faculty of Science, and Center of Excellence for Innovation in Analytical Science and Technology, Chiang Mai University, Thailand
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95
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Nacapricha D, Sastranurak P, Mantim T, Amornthammarong N, Uraisin K, Boonpanaid C, Chuyprasartwattana C, Wilairat P. Cross injection analysis: Concept and operation for simultaneous injection of sample and reagents in flow analysis. Talanta 2013; 110:89-95. [DOI: 10.1016/j.talanta.2013.02.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2013] [Revised: 02/06/2013] [Accepted: 02/06/2013] [Indexed: 11/25/2022]
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96
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Rocha DL, Rocha FR. An environmentally friendly flow-based procedure with photo-induced oxidation for the spectrophotometric determination of chloride in urine and waters. Microchem J 2013. [DOI: 10.1016/j.microc.2012.10.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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97
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Miró M, Hansen EH. On-line sample processing involving microextraction techniques as a front-end to atomic spectrometric detection for trace metal assays: a review. Anal Chim Acta 2013; 782:1-11. [PMID: 23708278 DOI: 10.1016/j.aca.2013.03.019] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Revised: 02/22/2013] [Accepted: 03/08/2013] [Indexed: 12/24/2022]
Abstract
Within the last decade, liquid-phase microextraction (LPME) and micro-solid phase extraction (μSPE) approaches have emerged as substitutes for conventional sample processing procedures for trace metal assays within the framework of green chemistry. This review surveys the progress of the state of the art in simplification and automation of microextraction approaches by harnessing to the various generations of flow injection (FI) as a front end to atomic absorption spectrometry (AAS), atomic fluorescence spectrometry (AFS) or inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES/MS). It highlights the evolution of flow injection analysis and related techniques as vehicles for appropriate sample presentation to the detector and expedient on-line matrix separation and pre-concentration of trace levels of metals in troublesome matrices. Rather than being comprehensive this review is aimed at outlining the pros and cons via representative examples of recent attempts in automating green sample preparation procedures in an FI or sequential injection (SI) mode capitalizing on single-drop microextraction, dispersive liquid-phase microextraction and advanced sorptive materials including carbon and metal oxide nanoparticles, ion imprinted polymers, superparamagnetic nanomaterials and biological/biomass sorbents. Current challenges in the field are identified and the synergetic combination of flow analysis, nanotechnology and metal-tagged biomolecule detection is envisaged.
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Affiliation(s)
- Manuel Miró
- FI-TRACE Group, Department of Chemistry, Faculty of Sciences, University of the Balearic Islands, E-07122 Palma de Mallorca, Illes Balears, Spain.
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98
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Kocúrová L, Balogh IS, Andruch V. Dispersive liquid-phase microextraction procedure for spectrometric determination of cadmium. Microchem J 2013. [DOI: 10.1016/j.microc.2012.05.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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99
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Proposed flow system for spectrophotometric determination of fluoride in natural waters. Talanta 2013; 105:69-74. [DOI: 10.1016/j.talanta.2012.11.071] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Revised: 11/26/2012] [Accepted: 11/26/2012] [Indexed: 11/21/2022]
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100
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Dong J, Fan X, Qiao F, Ai S, Xin H. A novel protocol for ultra-trace detection of pesticides: Combined electrochemical reduction of Ellman's reagent with acetylcholinesterase inhibition. Anal Chim Acta 2013; 761:78-83. [DOI: 10.1016/j.aca.2012.11.042] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2012] [Revised: 11/16/2012] [Accepted: 11/19/2012] [Indexed: 10/27/2022]
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