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Ramos do Nascimento V, Pereira de Almeida D, Giacobe K, Marlon de Moraes Flores E, Augusto Bizzi C. Microwave-assisted UV digestion of starch and skimmed milk powder: Environmentally friendly protocol for essential and toxic elements determination. Talanta 2024; 270:125575. [PMID: 38159353 DOI: 10.1016/j.talanta.2023.125575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 12/13/2023] [Accepted: 12/19/2023] [Indexed: 01/03/2024]
Abstract
The present work evaluated a microwave-assisted wet digestion method using diluted HNO3 with in situ UV radiation for the digestion of starch and skimmed milk powder for further metals determination by spectrometric plasma-based techniques. The sample digestion was conducted using an in situ UV lamp (electrodeless discharge lamp), and the digestion efficiency was improved by employing O2 (20 bar) and 2 mL 30 % H2O2 as auxiliary reagents. The accuracy of the proposed digestion method was evaluated by metals determination (Ca, Cd, Cu, Fe, K, Mg, Mo, Mn, Na, Pb, and Zn) in certificated reference material, which agreed with certified values (Student t-test <0,05). With the use of a UV lamp an environmentally friendly protocol was developed for starch and skimmed milk powder digestion using 0.1 mol L-1 HNO3 with auxiliary reagents (H2O2 or O2). The RCC value ranged from 0.9 to 1.2 % (starch and skimmed milk powder, respectively). The simultaneous cooling approach further improved the digestion efficiency (RCC <0,3 % for both samples), allowing to use milder digestion conditions, or even just water, being environmentally friendly, reducing the waste generation and reagents consumption, allowing food quality control through a greener approach.
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Affiliation(s)
| | | | - Karen Giacobe
- Chemistry department, Federal University of Santa Maria, 97105-900, Santa Maria, RS, Brazil.
| | | | - Cezar Augusto Bizzi
- Chemistry department, Federal University of Santa Maria, 97105-900, Santa Maria, RS, Brazil.
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Zhong Y, Ji M, Hu Y, Li G, Xiao X. Progress of Environmental Sample Preparation for Elemental Analysis. J Chromatogr A 2022; 1681:463458. [DOI: 10.1016/j.chroma.2022.463458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 08/22/2022] [Accepted: 08/29/2022] [Indexed: 10/14/2022]
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Adolfo FR, Nascimento PCD. Extraction Induced by Emulsion and Microemulsion Breaking for Metal Determination by Spectrometric Methods - A Review. Crit Rev Anal Chem 2022; 53:1374-1392. [PMID: 34991390 DOI: 10.1080/10408347.2021.2023352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
This review focuses on extraction induced by the destabilization of emulsified systems combined with spectrometric techniques for metal analysis in oily samples. This approach is based on the formation and breaking of an emulsion (extraction induced by emulsion breaking - EIEB) or microemulsion (extraction induced by microemulsion breaking - EIMB) to transfer the analytes from the oil sample to the aqueous phase, which is separated in the process. Its simplicity, speed, and low cost have contributed to its growing popularity among researchers. However, the potential of EIEB and EIMB is far from being fully exploited. Therefore, this paper aims to provide relevant information to expand the applicability of these methods. The principle of the methods is discussed, and a brief description of emulsified systems is presented. The parameters affecting the extraction efficiency and calibration strategy are also critically discussed. Furthermore, the analytical applications of the methods are reviewed. Trends and opportunities in this field are also considered.
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Affiliation(s)
- Franciele Rovasi Adolfo
- Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brasil
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Bazeľ Y, Sidey V, Fizer M, Fedyshyn O, Vojteková V, Reiffová K, Ostapiuk Y, Tymoshuk O. Palladium determination with a new dye PNBTAN: Structural, UV-VIS, and DFT study. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.131150] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Rastogi L, Ankam DP, Yadlapalli S, Dash K. Development of microwave assisted-UV digestion using diluted reagents for the determination of total nitrogen in cereals by ion chromatography. Curr Res Food Sci 2021; 4:421-428. [PMID: 34195623 PMCID: PMC8239805 DOI: 10.1016/j.crfs.2021.06.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 05/21/2021] [Accepted: 06/08/2021] [Indexed: 11/02/2022] Open
Abstract
The objective of this work is to develop a microwave assisted-ultraviolet (MW-UV) digestion in the presence of dilute HCl and H2O2 followed by ion chromatography (IC) measurements for the determination of total nitrogen in cereals. This approach (MW-UV-IC) requires lesser time and does not need environmentally hazardous materials as used in Kjeldhal method. Further, the developed method requires only microliter quantities of dilute HCl and few milliliters of H2O2 for the matrix digestion and simultaneous conversion of nitrogen to its ionic species for the subsequent analysis by IC. At the optimized acid concentrations (200 μL of 0.1 mol L-1 HCl) and microwave power, the nitrogen in the cereals flours is converted to nitrate (NO3 -), nitrite (NO2 -) and ammonium (NH4 +) ions. The nitrogen species were separated using IonPac AS-20 and IonPac CS-17 columns and then quantified using suppressed conductivity detection. The method was applied to estimate the total nitrogen in flours of various cereals like; wheat (Triticum aestivum), rice (Oryza sativa), finger millet (Eleusine coracana), jowar (Sorghum) and pearl millet (Pennisetum glaucum). The results obtained using proposed method, were in good agreement with that of Kjeldhal method. Further, the precision of the values obtained by developed method was on par with the Kjeldhal method for all the tested flours as verified by F-test (n = 5 and 95% confidence limit). Additionally, greenness assessment tools like analytical Eco-scale and green analytical procedure index (GAPI) suggested the proposed MW-UV-IC method, for the determination of total nitrogen in cereal flours, to be excellently green and safe.
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Affiliation(s)
- Lori Rastogi
- National Centre for Compositional Characterization of Materials (NCCCM), Bhabha Atomic Research Centre, ECIL Post, Hyderabad, 500 062, India
| | - Durga Prasad Ankam
- National Centre for Compositional Characterization of Materials (NCCCM), Bhabha Atomic Research Centre, ECIL Post, Hyderabad, 500 062, India
| | - S Yadlapalli
- FirstSource Laboratory Solutions LLP, IDA, Nacharam, Hyderabad, 500 076, India
| | - K Dash
- National Centre for Compositional Characterization of Materials (NCCCM), Bhabha Atomic Research Centre, ECIL Post, Hyderabad, 500 062, India.,Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400 094, India
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Ultrasound-Assisted Dispersive Liquid-Liquid Microextraction Based on Melting of the Donor Phase: a New Approach for the Determination of Trace Elements in Solid Samples. FOOD ANAL METHOD 2020. [DOI: 10.1007/s12161-020-01897-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Reis AS, Paltian JJ, Domingues WB, Novo DLR, Costa GP, Alves D, Campos VF, Mesko MF, Luchese C, Wilhelm EA. Advances in the Understanding of Oxaliplatin-Induced Peripheral Neuropathy in Mice: 7-Chloro-4-(Phenylselanyl) Quinoline as a Promising Therapeutic Agent. Mol Neurobiol 2020; 57:5219-5234. [PMID: 32869182 DOI: 10.1007/s12035-020-02048-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Accepted: 07/28/2020] [Indexed: 12/13/2022]
Abstract
In this study, the deposition of platinum in oxaliplatin (OXA)-exposed mice and the effects of the oxidative damage on the central nervous system were investigated. The relationship between the reactive species (RS) levels as well as the expression and activity of enzymes, such as catalase (CAT), glutathione peroxidase (GPx), superoxide dismutase (SOD) and acetylcholinesterase (AChE), in the development of peripheral neuropathy after OXA exposure, was evidenced. The effects of 7-chloro-4-(phenylselanyl) quinoline (4-PSQ) on OXA-induced peripheral neuropathy was also investigated. Swiss mice received OXA (10 mg kg-1) or vehicle by intraperitoneal route (days 0 and 2). Oral administration of 4-PSQ (1 mg kg-1) or vehicle was performed on days 2 to 14. Behavioural tasks started on day 9, after the first OXA administration. It was observed that 4-PSQ reduced the mechanical and thermal hypersensitivity induced by OXA. 4-PSQ and OXA did not affect locomotor and exploratory activities. The results revealed, for the first time, a high concentration of platinum in the spinal cord of mice exposed to OXA. 4-PSQ reversed the increased levels of RS in the spinal cord, cerebral cortex and hippocampus of mice exposed to OXA. The alterations in the activity and expression of the GPx, SOD, CAT and AChE induced by OXA exposure were normalized by 4-PSQ. Therefore, the 4-PSQ might be a good prototype for the development of a more effective drug for the treatment of OXA-induced peripheral neuropathy. The results obtained by the present study expanded the knowledge about the mechanisms involved in the physiopathology of peripheral neuropathy. Graphical abstract.
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Affiliation(s)
- Angélica S Reis
- Programa de Pós-graduação em Bioquímica e Bioprospecção, Laboratório de Pesquisa em Farmacologia Bioquímica, CCQFA, Universidade Federal de Pelotas, UFPel, Pelotas, RS, CEP 96010-900, Brazil
| | - Jaini J Paltian
- Programa de Pós-graduação em Bioquímica e Bioprospecção, Laboratório de Pesquisa em Farmacologia Bioquímica, CCQFA, Universidade Federal de Pelotas, UFPel, Pelotas, RS, CEP 96010-900, Brazil
| | - William B Domingues
- Programa de Pós-graduação em Biotecnologia, Laboratório de Genômica Estrutural, Biotecnologia, Universidade Federal de Pelotas, UFPel, Pelotas, RS, CEP 96010-900, Brazil
| | - Diogo L R Novo
- Programa de Pósgraduação em Química, Laboratório de Controle de Contaminantes em Biomateriais, CCQFA, Universidade Federal de Pelotas, UFPel, Pelotas, CEP 96010-900, Brazil
| | - Gabriel P Costa
- Programa de Pós-graduação em Química, Laboratório de Síntese Orgânica Limpa, CCQFA, Universidade Federal de Pelotas, UFPel, Pelotas, RS, CEP 96010-900, Brazil
| | - Diego Alves
- Programa de Pós-graduação em Química, Laboratório de Síntese Orgânica Limpa, CCQFA, Universidade Federal de Pelotas, UFPel, Pelotas, RS, CEP 96010-900, Brazil
| | - Vinicius F Campos
- Programa de Pós-graduação em Biotecnologia, Laboratório de Genômica Estrutural, Biotecnologia, Universidade Federal de Pelotas, UFPel, Pelotas, RS, CEP 96010-900, Brazil
| | - Marcia F Mesko
- Programa de Pósgraduação em Química, Laboratório de Controle de Contaminantes em Biomateriais, CCQFA, Universidade Federal de Pelotas, UFPel, Pelotas, CEP 96010-900, Brazil
| | - Cristiane Luchese
- Programa de Pós-graduação em Bioquímica e Bioprospecção, Laboratório de Pesquisa em Farmacologia Bioquímica, CCQFA, Universidade Federal de Pelotas, UFPel, Pelotas, RS, CEP 96010-900, Brazil.
| | - Ethel A Wilhelm
- Programa de Pós-graduação em Bioquímica e Bioprospecção, Laboratório de Pesquisa em Farmacologia Bioquímica, CCQFA, Universidade Federal de Pelotas, UFPel, Pelotas, RS, CEP 96010-900, Brazil.
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Evaluation of microwave-assisted ultraviolet digestion method for rice and wheat for subsequent spectrometric determination of As, Cd, Hg and Pb. J Food Compost Anal 2020. [DOI: 10.1016/j.jfca.2020.103585] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Bakircioglu Kurtulus Y, Bakircioglu D, Babac AC, Yurtsever S, Topraksever N. Extraction of Cu, Fe, Mn, and Ni from Margarine Samples Using Extraction Induced by Emulsion Breaking Procedure Prior to Graphite Furnace Atomic Absorption Spectrometry and Comparison of Results to Provisional Tolerable Daily Intake Values. J AOAC Int 2020; 103:1256-1263. [PMID: 33241381 DOI: 10.1093/jaoacint/qsaa028] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 11/11/2020] [Accepted: 02/25/2020] [Indexed: 11/12/2022]
Abstract
BACKGROUND The emulsion induced by emulsion breaking (EIEB) procedure was previously reported for the extraction of copper, iron, manganese, and nickel from liquid oil samples such as vegetable oil. OBJECTIVE To optimize the EIEB procedure for determination of copper, iron, manganese, and nickel in solid oil (margarine) samples by Graphite Furnace Atomic Absorption Spectrometry (GFAAS). METHODS The extraction procedure uses a surfactant in nitric acid to form an emulsion followed by heating to break the emulsion. Optimization included variation of the test portion size, the type and concentration of the surfactant, the concentration of nitric acid in the aqueous solution, the emulsion agitation time, heating temperature, and the time required to break the emulsion. RESULTS Mean element concentrations of 11 margarine samples were in the following ranges: Cu 0.031-0.131 µg/g, Fe 5.7-24.9 µg/g, Mn 0.542-1.11 µg/g, and Ni 0.108-0.134 µg/g. Under the optimized extraction conditions, the detection limits (µg/kg) were 4.8, 13, 1.5, and 23 for Cu, Fe, Mn, and Ni, respectively. The accuracy of the extraction procedure was determined by comparison to commonly used microwave digestion procedure. The EIEB results were not statistically different from the microwave digestion results when analyzed by GFAAS as determined by the statistical tests. CONCLUSIONS The EIEB procedure was shown to be equivalent to the commonly used microwave digestion procedure for extraction of analytes from margarine samples. HIGHLIGHTS The optimized EIEB extraction procedure is simple, rapid, low cost, and environmentally friendly. It has improved detection limits and allows calibration with aqueous standards.
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Affiliation(s)
| | - Dilek Bakircioglu
- Trakya University, Faculty of Science, Department of Chemistry, Edirne, Turkey
| | - Alper Can Babac
- Trakya University, Faculty of Science, Department of Chemistry, Edirne, Turkey
| | - Selcuk Yurtsever
- Trakya University, Faculty of Science, Department of Biology, Edirne, Turkey
| | - Nukte Topraksever
- Trakya University, Faculty of Science, Department of Chemistry, Edirne, Turkey
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A new and feasible analytical method using reversed-phase dispersive liquid-liquid microextraction (RP-DLLME) for further determination of Nickel in hydrogenated vegetable fat. Talanta 2020; 208:120409. [PMID: 31816787 DOI: 10.1016/j.talanta.2019.120409] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 09/17/2019] [Accepted: 09/28/2019] [Indexed: 02/07/2023]
Abstract
A new and simple method for Ni determination in hydrogenated vegetable fat (HVF) has been developed using a RP-DLLME sample preparation procedure for further determination by flame atomic absorption spectrometry (FAAS) and graphite furnace atomic absorption spectrophotometry (GFAAS). The RP-DLLME procedure includes simultaneous microextraction and preconcentration of Ni in HVF, using 5.0 g of HVF preheated (75 °C) and diluted in 5.0 mL of xylene, with the addition of a dispersant/extractant mixture (n-propanol/dilute HNO3). The sample was manually stirred and centrifuged and the aqueous phase was collected for further Ni determination by FAAS and GFAAS. RP-DLLME was carried out using only 700 μL of n-propanol and 300 μL of 2.0 mol L-1 HNO3. The recovery varied from 93.3% to 101.5% for HVF. The LODs and LOQs were 40 and 90 ng g-1 for FAAS, and 0.41 and 1.36 ng g-1 for GFAAS. The proposed analytical method is viable and this is the first application of RP-DLLME to solid fat samples, with Ni determination as an example of application. This method consumes small amounts of reagents, with lower toxicity as compared to microwave decomposition. Furthermore, the key features of the RP-DLLME method include simplicity of operation, high sample mass, reduced reagent consumption, and use of diluted HNO3 as an extractant.
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New and feasible method for total phosphorus and sulfur determination in dietary supplements by ion chromatography. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2018.03.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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A closed inline system for sample digestion using 70% hydrogen peroxide and UV radiation. Determination of lead in wine employing ETAAS. Talanta 2019; 191:479-484. [DOI: 10.1016/j.talanta.2018.08.085] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 08/29/2018] [Accepted: 08/30/2018] [Indexed: 11/22/2022]
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Novo DLR, Mello JE, Rondan FS, Henn AS, Mello PA, Mesko MF. Bromine and iodine determination in human saliva: Challenges in the development of an accurate method. Talanta 2018; 191:415-421. [PMID: 30262078 DOI: 10.1016/j.talanta.2018.08.081] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 08/27/2018] [Accepted: 08/28/2018] [Indexed: 01/24/2023]
Abstract
In this work, an analytical method for bromine and iodine determination in human saliva was proposed. A simple protocol based on centrifugation and direct analysis of supernatant by inductively coupled plasma mass spectrometry (ICP-MS) was investigated. Although this method was feasible for bromine determination, iodine was partially present in the supernatant and an agreement about 54% with reference value was obtained. In addition, microwave-induced combustion (MIC) and microwave-assisted dissolution were also evaluated. Using MIC, 0.2 mL of saliva added on 300 mg of microcrystalline cellulose were efficiently digested. A diluted solution (50 mmol L-1 NH4OH) was used for analytes absorption, and a reflux step of 5 min was applied to ensure quantitative recoveries of Br and I. Accuracy was evaluated by analyte recovery experiments, and recoveries between 94% and 98% were obtained. Microwave-assisted dissolution was evaluated for 2.0 mL of saliva using also a diluted alkaline solution (25 mmol L-1 NH4OH) and a microwave irradiation program of 35 min (including the cooling step). Results for this method agreed with those obtained using MIC. Although MIC has also been appropriated for further determination of Br and I in saliva, microwave-assisted dissolution can be considered a simpler sample preparation method and it was effective for high amount of sample (up to 2.0 mL). Moreover, final solutions were compatible with ICP-MS analysis, allowing the quantification of Br and I in human saliva at ultra-trace concentrations (limits of quantification were 0.052 μg mL-1 for Br and 0.022 μg mL-1 for I).
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Affiliation(s)
- Diogo La Rosa Novo
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000 Capão do Leão, RS, Brazil
| | - Julia Eisenhardt Mello
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000 Capão do Leão, RS, Brazil
| | - Filipe Soares Rondan
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000 Capão do Leão, RS, Brazil
| | | | - Paola Azevedo Mello
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Marcia Foster Mesko
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000 Capão do Leão, RS, Brazil.
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