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Cauduro VH, Alves CMAC, Nascimento MS, Druzian GT, Balbinot FP, Mesko MF, Flores EMM. Microwave-induced combustion for further determination of potentially toxic elements in honey by ICP-MS. Anal Bioanal Chem 2024; 416:2859-2870. [PMID: 38459967 DOI: 10.1007/s00216-024-05235-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 02/22/2024] [Accepted: 02/28/2024] [Indexed: 03/11/2024]
Abstract
Microwave-induced combustion (MIC) was proposed in this study for honey decomposition aiming for As, Cd, Hg, and Pb determination by inductively coupled plasma mass spectrometry (ICP-MS). Sample mass (up to 1.0 g), absorbing solution (0.5 to 14.4 mol L-1 HNO3, and H2O), heating program, and combustion aids were evaluated. The Eurachem guidelines were used for method validation. The proposed method enabled combustion of a high sample mass (0.8 g of honey, with 0.4 g of microcrystalline cellulose and 100 µL of 6 mol L-1 NH4NO3) using 6 mL of an absorbing solution consisting of 1 mol L-1 HNO3, which resulted in low residual carbon in solution (< 25 mg L-1). Honey samples from different geographical origins were analyzed. Results showed no significant difference in comparison to other two microwave decomposition methods, based on microwave-assisted wet digestion with single reaction chamber (MAWD-SRC) and microwave-assisted wet digestion (MAWD). Standard addition experiments resulted in recoveries higher than 98%. The limits of detection ranged from 1.10 (As) to 4.60 ng g-1 (Pb). In addition to using only diluted reagents and resulting in digests virtually free of interferences, the proposed method was faster (< 30 min) than most of those presented in the literature.
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Affiliation(s)
- Vitoria H Cauduro
- Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Camila M A C Alves
- Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Mariele S Nascimento
- Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Gabriel T Druzian
- Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Fernanda P Balbinot
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Capão do Leão, RS, 96160-000, Brazil
| | - Marcia F Mesko
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Capão do Leão, RS, 96160-000, Brazil
| | - Erico M M Flores
- Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil.
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Scaglioni PT, Balbinot FP, Rondan FS, Novo DLR, Silva AA, Mesko MF. New Analytical Strategy for Bioaccessibility Evaluation of Bromine and Iodine from Edible Seaweeds. J Agric Food Chem 2023. [PMID: 36972393 DOI: 10.1021/acs.jafc.2c08541] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
A strategy for determining the bioaccessibility of bromine and iodine from edible seaweeds was proposed for the first time using microwave-induced combustion (MIC) and ion chromatography coupled to mass spectrometry (IC-MS) after in vitro digestion. The concentrations of bromine and iodine in edible seaweeds using the proposed methods (MIC and IC-MS) were not statistically different from those using MIC and inductively coupled plasma mass spectrometry (p > 0.05). Trueness was assessed by recovery experiments (101-110%, relative standard deviation <10%). Following an in vitro digestion protocol, MIC was proposed as sample preparation for bioaccessible and residual fractions. Using this strategy, the mass balance totaled from 97 to 111%. No statistical difference (p > 0.05) was observed between the total concentration of bromine or iodine and their concentration in bioaccessible and residual fractions for three edible seaweed species, indicating full analyte quantification in the fractions.
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Affiliation(s)
- Priscila T Scaglioni
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000 Capão do Leão, RS, Brazil
| | - Fernanda P Balbinot
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000 Capão do Leão, RS, Brazil
| | - Filipe S Rondan
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000 Capão do Leão, RS, Brazil
| | - Diogo L R Novo
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000 Capão do Leão, RS, Brazil
| | - Alisson A Silva
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000 Capão do Leão, RS, Brazil
| | - Marcia F Mesko
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000 Capão do Leão, RS, Brazil
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Santos D, Iop GD, Bizzi CA, Mello PA, Mesko MF, Balbinot FP, Flores EMM. A single step ultrasound-assisted nitrocellulose synthesis from microcrystalline cellulose. Ultrason Sonochem 2021; 72:105453. [PMID: 33412386 PMCID: PMC7803929 DOI: 10.1016/j.ultsonch.2020.105453] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 12/22/2020] [Accepted: 12/23/2020] [Indexed: 06/12/2023]
Abstract
Nitrocellulose is a nitrated cellulose polymer with a broad application in industry. Depending on the nitrogen content, this polymer can be used for manufacturing explosives, varnishes, clothes, and films, being considered a product of high value-added. In this work, the use of ultrasound was investigated for the intensification of nitrocellulose synthesis from microcrystalline cellulose. The ultrasound-assisted nitrocellulose synthesis (UANS) was carried out using several ultrasound systems, such as baths and cup horns, allowing the evaluation of the frequency (from 20 to 130 kHz) and delivered power (from 23 to 134 W dm-3) to the reaction medium. The following parameters were evaluated: acid mixture (H2SO4, H3PO4, CH2O2 or CH3COOH with HNO3, 2 to 14.4 mol L-1), ultrasound amplitude (10 to 70%) and reaction time (5 to 50 min). Better nitrocellulose yield (nitrogen content of 12.5% was obtained from 1 g of microcrystalline cellulose employing a cup horn system operating at 20 kHz, 750 W of nominal power with 60% of amplitude, 25 mL of acid solution (13.6 mL of 18.4 mol L-1 H2SO4 + 9.2 mL of 14.4 mol L-1 HNO3 + 2.2 mL H2O), at 30 °C for 30 min. At silent conditions (mechanical stirring ranging from 100 to 500 rpm), the nitrogen content was lower than 11.8% which demonstrate the ultrasound effects for nitrocellulose synthesis.
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Affiliation(s)
- Daniel Santos
- Department of Chemistry, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Gabrielle D Iop
- Department of Chemistry, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Cezar A Bizzi
- Department of Chemistry, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Paola A Mello
- Department of Chemistry, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Marcia F Mesko
- Center of Chemistry, Pharmaceutical and Food Sciences, Universidade Federal de Pelotas, 96160-000 Pelotas, RS, Brazil
| | - Fernanda P Balbinot
- Center of Chemistry, Pharmaceutical and Food Sciences, Universidade Federal de Pelotas, 96160-000 Pelotas, RS, Brazil
| | - Erico M M Flores
- Department of Chemistry, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil.
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Mesko MF, Balbinot FP, Scaglioni PT, Nascimento MS, Picoloto RS, da Costa VC. Determination of halogens and sulfur in honey: a green analytical method using a single analysis. Anal Bioanal Chem 2020; 412:6475-6484. [PMID: 32394040 DOI: 10.1007/s00216-020-02636-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 03/24/2020] [Accepted: 04/01/2020] [Indexed: 12/26/2022]
Abstract
The halogen determination is important in view of their biological and environmental roles, but their determination has still been considered a challenge, especially at low concentrations. Therefore, a method for honey decomposition using microwave-induced combustion (MIC) combined with ion chromatography and conductimetric detection (for Cl, F, and S determination) or mass detection (for Br and I determination) (IC-CD-MS) is proposed. Trueness was evaluated by adding reference materials (RMs) or a standard solution in the sample. By using 50 mmol L-1 NH4OH as the absorbing solution, recoveries for all analytes were between 94 and 103%, in both tests. Moreover, no statistical difference (t test, confidence level of 95%) was observed for the results obtained by IC in comparison with those obtained by inductively coupled plasma optical emission spectroscopy (Cl and S) and by inductively coupled plasma mass spectrometry (Br and I). Finally, the proposed method was applied to 19 honey samples from different origins. The concentrations ranged from < 0.45 to 2.39 mg kg-1 (Br), 21.8 to 671 mg kg-1 (Cl), and 11 to 154 mg kg-1 (S), while the F and I concentrations were below that their quantification limits (LOQs) in all analyzed samples. The LOQs for Br, Cl, F, I, and S were 0.45, 21, 3.7, 0.077, and 8.7 mg kg-1, respectively. The MIC method provided a compatible solution to IC for the halogen and S determination in honey by a single analysis. Graphical abstract.
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Affiliation(s)
- Marcia F Mesko
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Capão do Leão, RS, 96160-000, Brazil.
| | - Fernanda P Balbinot
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Capão do Leão, RS, 96160-000, Brazil
| | - Priscila T Scaglioni
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Capão do Leão, RS, 96160-000, Brazil
| | - Mariele S Nascimento
- Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Rochele S Picoloto
- Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Vanize C da Costa
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Capão do Leão, RS, 96160-000, Brazil
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