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Oliveira DK, Cauduro VH, Moraes Flores EL, Flores EMM. Pyrohydrolysis as a sample preparation method for the subsequent halogen determination: A review. Anal Chim Acta 2024; 1288:342054. [PMID: 38220265 DOI: 10.1016/j.aca.2023.342054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 11/19/2023] [Accepted: 11/20/2023] [Indexed: 01/16/2024]
Abstract
The use of pyrohydrolysis as a sample preparation method for further halogen determination is extensively discussed in this review, covering studies published in the last 30 years. This method is compatible with both organic (such as cellulose, fossil fuels, carbon nanotubes, and graphite) and inorganic (such as rocks, silicates, alumina, and nuclear fuels) matrices. It has also been used for samples with different organic matter content, such as coal, mineral supplements, and soil. Sample masses vary greatly and are dependent on organic matter content in the samples, ranging from 50 mg to up to 500 mg for organic samples, and up to 4 g to inorganic samples. Different additives, such as V2O5 and cellulose, or flame retardants, such as silica, could also be used to improve analyte recovery using pyrohydrolysis. Dilute alkaline solutions or even water have been used as absorbing solutions, with mainly NaOH, NH4OH, and mixtures of NaHCO3 and Na2CO3 being applied. Furthermore, pyrohydrolysis is compatible with detection techniques such as ion chromatography, inductively coupled plasma mass spectrometry, ion selective electrode, inductively coupled plasma optical emission spectrometry, energy-dispersive X-ray fluorescence spectrometry, spectrophotometry, and isotope ratio mass spectrometry. Other advantages usually related to this method are the low residual carbon concentration of digests and the low residue generation. A critical comparison with alkaline extraction, alkaline fusion, Schöniger oxygen flask combustion, combustion bomb and microwave-induced combustion is also provided.
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Crestani PC, Pereira TC, Larruscain ETF, Laureano CR, Flores EMM, Duarte FA. A simple, low cost and fast sample preparation method for fluorine determination by ISE in leguminous seeds and oilseeds. Food Chem 2023; 429:136916. [PMID: 37481982 DOI: 10.1016/j.foodchem.2023.136916] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 06/29/2023] [Accepted: 07/15/2023] [Indexed: 07/25/2023]
Abstract
This work presents the first report of the application of microwave-induced combustion in disposable vessels (MIC-DV) as a simple and fast sample preparation step for fluoride determination by ion-selective electrode (ISE) in leguminous seeds and oilseeds samples. Several experimental conditions of MIC-DV were evaluated, such as sample mass, absorbing solution, volume of combustion igniter, purging time with oxygen, and the use of successive combustion cycles. The accuracy of MIC-DV/ISE method was evaluated by comparing the results obtained by microwave-induced combustion and determination by ion chromatography, with agreements ranged from 94 to 106%. The method allowed to achieve relatively low limits of quantification (8.3 to 16 µg g-1) comparing to AOAC method (40 µg g-1), besides the use of small amounts of reagents, less handling of digests, making the method greener and with portable features comparing to other methods.
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Affiliation(s)
- Paola C Crestani
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Thiago C Pereira
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Eliana T F Larruscain
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Conrado R Laureano
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Erico M M Flores
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Fabio A Duarte
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil.
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Mandlate JS, Henn AS, Mello PA, Flores EMM, Barin JS, Duarte FA. Determination of Cl and S in crude oil by ICP-OES after sample digestion by microwave-induced combustion in disposable vessels. Anal Chim Acta 2023; 1273:341536. [PMID: 37423667 DOI: 10.1016/j.aca.2023.341536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 06/14/2023] [Accepted: 06/15/2023] [Indexed: 07/11/2023]
Abstract
A simple, fast and promising sample preparation method based on microwave-induced combustion in disposable vessels (MIC-DV) was developed for Cl and S determination in crude oil by inductively coupled plasma optical emission spectrometry (ICP-OES). The MIC-DV consists of a new approach of conventional microwave-induced combustion (MIC). For the combustion, crude oil was pipetted on a disk of filter paper and placed on a quartz holder, followed by the addition of igniter solution (40 μL of 10 mol L-1 NH4NO3). The quartz holder was inserted into a commercial 50 mL disposable polypropylene vessel containing the absorbing solution, which was then inserted in an aluminium rotor. The combustion occurs under atmospheric pressure in a domestic microwave oven not compromising the operator's safety. The following parameters of combustion were evaluated: type, concentration and volume of absorbing solution, sample mass and the possibility of performing consecutive combustion cycles. Using MIC-DV, up to 10 mg of crude oil were efficiently digested, using 2.5 mL of ultrapure H2O as absorbing solution. Moreover, up to 5 consecutive combustion cycles were possible without analyte losses, reaching a total sample mass of 50 mg. The MIC-DV method was validated according to Eurachem Guide recommendations. Results obtained for Cl and S by MIC-DV were in agreement with those obtained using conventional MIC, as well as those obtained for S in a certified reference material of crude oil (NIST 2721). Analyte spike recovery experiments were performed and recoveries at three concentration levels ranged from 99 to 101% for Cl and from 95 to 97% for S, indicating a good accuracy. The limit of quantification achieved by ICP-OES after MIC-DV were 73 and 50 μg g-1 for Cl and S respectively, applying 5 consecutive combustion cycles.
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Affiliation(s)
- Jaime S Mandlate
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, Rio Grande do Sul, Brazil; Departamento de Química, Universidade Eduardo Mondlane, Maputo, P.O. Box 252, Mozambique; Centro Regional de Excelência em Estudos de Engenharia e Tecnologia de Petróleo e Gás, Universidade Eduardo Mondlane, P.O. Box 252, Mozambique
| | - Alessandra S Henn
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, Rio Grande do Sul, Brazil; Departamento de Química, Universidade Tecnológica Federal do Paraná, 85884-000, Medianeira, Paraná, Brazil
| | - Paola A Mello
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, Rio Grande do Sul, Brazil
| | - Erico M M Flores
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, Rio Grande do Sul, Brazil
| | - Juliano S Barin
- Grupo 3i, Departamento de Tecnologia e Ciência dos Alimentos, Universidade Federal de Santa Maria, 97105-900, Santa Maria, Rio Grande do Sul, Brazil
| | - Fabio A Duarte
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, Rio Grande do Sul, Brazil.
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A New Method for the Determination of Phosphorus and Iodine in Phosphate Rock by Ion Chromatography After Continuous Acid Digestion and Distillation. Chromatographia 2022. [DOI: 10.1007/s10337-022-04197-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Muhammad N, Ali A, Hussain I, Subhani Q, Guo D, Cui H, Zhu Y. Determination of fluorine and chlorine in standard steel residues and zinc sulfide concentrates by ion chromatography-Matrix interference study. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2022. [DOI: 10.1016/j.cjac.2022.100147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Waechter SR, Vecchia PD, Barin JS, Flores EMM, Duarte FA. Microwave-based strategies for sample preparation and halogen determination in blood using ICP-MS. Talanta 2021; 226:122157. [PMID: 33676704 DOI: 10.1016/j.talanta.2021.122157] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 01/24/2021] [Accepted: 01/26/2021] [Indexed: 10/22/2022]
Abstract
In this work, two microwave-assisted sample preparation methods based on combustion and ultraviolet digestion for futher determination of Br, Cl, and I in blood by inductively coupled plasma mass spectrometry were proposed. For microwave-induced combustion (MIC), blood was spotted on square pieces of Munktell TFN paper, and water and diluted NH4OH were evaluated as absorbing solutions. The stability of the analytes in the spotted blood was also evaluated. During 90 days, no changes of halogen content were observed for samples (with and without anticoagulant) on paper stored in a desiccator at 20 ± 5 °C. Whole blood was also digested by microwave-assisted ultraviolet digestion (MAD-UV). Some parameters as the volume of HNO3 solution, the influence of H2O2, and the effect of UV radiation were investigated. The interferences caused by C and K on halogen determination were carefully investigated. The results for MIC and MAD-UV and Br, Cl and I determination by ICP-MS presented no difference. The accuracy of MIC and MAD-UV was also evaluated by analyte spike with reference solutions of Br, Cl and I using inorganic species and also organic I standard (T4-levothyroxine). For both methods, recoveries were 94 and 108% for Br, 96 and 103% for Cl, and 104 and 97% for I. In case of organic I, recoveries were 99 and 111% for MIC and MAD-UV, respectively. The limits of quantification for MIC and MAD-UV after ICP-MS determination were 0.06 and 0.04 μg g-1 for Br, 14 and 30 μg g-1 for Cl and 12 and 8 ng g-1 for I, respectively. The proposed methods provide a suitable digestion approach, assuring safety and high digestion efficiency for further halogen determination in blood, with the possibility to use in clinical analysis.
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Affiliation(s)
- Samuel R Waechter
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
| | - Paula Dalla Vecchia
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
| | - Juliano S Barin
- Departamento de Tecnologia e Ciência de Alimentos, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
| | - Erico M M Flores
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
| | - Fabio A Duarte
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil.
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Moirana RL, Kivevele T, Mkunda J, Mtei K, Machunda R. Trends towards Effective Analysis of Fluorinated Compounds Using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2021; 2021:8837315. [PMID: 33623722 PMCID: PMC7875612 DOI: 10.1155/2021/8837315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 01/15/2021] [Accepted: 01/22/2021] [Indexed: 05/17/2023]
Abstract
Increased demand for monitoring and identification of novel and unknown fluorinated compounds (FCs) has demonstrated the need of sensitive fluorine-specific detectors for unknown FCs in both biological and environmental matrices. Inductively coupled plasma mass spectrometry (ICP-MS) is a promising technique for analysis of FCs and has been rated as the most powerful tool in analytical chemistry. However, direct determination of fluorine using this technique is challenged by high ionization potential of fluorine together with spectral and nonspectral interferences which affect the quality of results. To enhance the quality of results, several studies have reported modifications of a conventional ICP-MS analysis procedure on sample preparation, introduction, analysis, and instrument optimization. Therefore, the focus of this study is to discuss different ICP-MS optimizations and future trends towards the effective analysis of FCs using ICP-MS.
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Affiliation(s)
- Ruth Lorivi Moirana
- The Nelson Mandela African Institution of Science and Technology (NM-AIST), School of Material Energy Water and Environmental Sciences, P.O. Box 447, Arusha, Tanzania
| | - Thomas Kivevele
- The Nelson Mandela African Institution of Science and Technology (NM-AIST), School of Material Energy Water and Environmental Sciences, P.O. Box 447, Arusha, Tanzania
| | - Josephine Mkunda
- The Nelson Mandela African Institution of Science and Technology (NM-AIST), School of Material Energy Water and Environmental Sciences, P.O. Box 447, Arusha, Tanzania
| | - Kelvin Mtei
- The Nelson Mandela African Institution of Science and Technology (NM-AIST), School of Material Energy Water and Environmental Sciences, P.O. Box 447, Arusha, Tanzania
| | - Revocatus Machunda
- The Nelson Mandela African Institution of Science and Technology (NM-AIST), School of Material Energy Water and Environmental Sciences, P.O. Box 447, Arusha, Tanzania
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Muhammad N, Zhang Y, Asif M, Farooq Saleem Khan M, Intisar A, Mingli Y, Subhani Q, Cui H, Zhu Y. Feasibility of pyrohydrolysis and extended-steam distillation method for the extraction of two halides from zinc and lead concentrate samples followed by ion chromatography analysis. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105593] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Tjabadi E, Mketo N. Recent developments for spectrometric, chromatographic and electroanalytical determination of the total sulphur and halogens in various matrices. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.05.033] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Cauduro VH, Doneda M, Barin JS, Mello PA, Flores EM, Picoloto RS. Successive digestions for pre-concentration and ultra-trace determination of Br and I by plasma-based atomic spectrometry and ion chromatography. Microchem J 2019. [DOI: 10.1016/j.microc.2019.03.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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