New and feasible method for total phosphorus and sulfur determination in dietary supplements by ion chromatography
The microwave-assisted digestion of dietary supplements using diluted nitric acid under oxygen pressure for subsequent indirect determination of phosphorus and sulfur by ion chromatography (IC) was proposed. Different concentrations of nitric acid (from 1 to 14.4 mol L−1) and oxygen pressures (from...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-01-01
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| Series: | Arabian Journal of Chemistry |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535218300649 |
| _version_ | 1818501134712569856 |
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| author | Marcia Foster Mesko Marcelo Guerreiro Crizel Diogo La Rosa Novo Carla Andrade Hartwig Filipe Soares Rondan Cezar Augusto Bizzi |
| author_facet | Marcia Foster Mesko Marcelo Guerreiro Crizel Diogo La Rosa Novo Carla Andrade Hartwig Filipe Soares Rondan Cezar Augusto Bizzi |
| author_sort | Marcia Foster Mesko |
| collection | DOAJ |
| description | The microwave-assisted digestion of dietary supplements using diluted nitric acid under oxygen pressure for subsequent indirect determination of phosphorus and sulfur by ion chromatography (IC) was proposed. Different concentrations of nitric acid (from 1 to 14.4 mol L−1) and oxygen pressures (from 5 to 20 bar) were evaluated. Dissolved organic carbon and residual acidity were used to choose the most suitable digestion condition. Using the proposed method, it was possible to digest up to 1350 mg of dietary supplements using only 5 mol L−1 HNO3 under 5 bar of oxygen pressure. Comparing to conventional digestion procedure it was possible to digest up to 60% higher sample mass using HNO3 around 30% more diluted. Recoveries ranging from 96 to 102% were obtained when recovery tests using a standard solution or a mixture with certificate reference material were carried out. The concentration of P and S indirectly determined by IC agreed with the results obtained by conventional microwave-assisted digestion using concentrated HNO3 and subsequent determination by inductively coupled plasma optical emission spectrometry. Keywords: Sample preparation, Digestion under oxygen pressure, Diluted acid, Ion chromatography, Food safety, Routine analysis |
| first_indexed | 2024-12-10T20:52:03Z |
| format | Article |
| id | doaj.art-7fc0e0ffe23d4867b0bcf8ef033f64cf |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-12-10T20:52:03Z |
| publishDate | 2020-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-7fc0e0ffe23d4867b0bcf8ef033f64cf2022-12-22T01:34:03ZengElsevierArabian Journal of Chemistry1878-53522020-01-0113120762083New and feasible method for total phosphorus and sulfur determination in dietary supplements by ion chromatographyMarcia Foster Mesko0Marcelo Guerreiro Crizel1Diogo La Rosa Novo2Carla Andrade Hartwig3Filipe Soares Rondan4Cezar Augusto Bizzi5Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000, Capão do Leão, RS, Brazil; Corresponding author.Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000, Capão do Leão, RS, BrazilCentro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000, Capão do Leão, RS, BrazilCentro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000, Capão do Leão, RS, BrazilCentro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, 96160-000, Capão do Leão, RS, BrazilDepartamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, BrazilThe microwave-assisted digestion of dietary supplements using diluted nitric acid under oxygen pressure for subsequent indirect determination of phosphorus and sulfur by ion chromatography (IC) was proposed. Different concentrations of nitric acid (from 1 to 14.4 mol L−1) and oxygen pressures (from 5 to 20 bar) were evaluated. Dissolved organic carbon and residual acidity were used to choose the most suitable digestion condition. Using the proposed method, it was possible to digest up to 1350 mg of dietary supplements using only 5 mol L−1 HNO3 under 5 bar of oxygen pressure. Comparing to conventional digestion procedure it was possible to digest up to 60% higher sample mass using HNO3 around 30% more diluted. Recoveries ranging from 96 to 102% were obtained when recovery tests using a standard solution or a mixture with certificate reference material were carried out. The concentration of P and S indirectly determined by IC agreed with the results obtained by conventional microwave-assisted digestion using concentrated HNO3 and subsequent determination by inductively coupled plasma optical emission spectrometry. Keywords: Sample preparation, Digestion under oxygen pressure, Diluted acid, Ion chromatography, Food safety, Routine analysishttp://www.sciencedirect.com/science/article/pii/S1878535218300649 |
| spellingShingle | Marcia Foster Mesko Marcelo Guerreiro Crizel Diogo La Rosa Novo Carla Andrade Hartwig Filipe Soares Rondan Cezar Augusto Bizzi New and feasible method for total phosphorus and sulfur determination in dietary supplements by ion chromatography Arabian Journal of Chemistry |
| title | New and feasible method for total phosphorus and sulfur determination in dietary supplements by ion chromatography |
| title_full | New and feasible method for total phosphorus and sulfur determination in dietary supplements by ion chromatography |
| title_fullStr | New and feasible method for total phosphorus and sulfur determination in dietary supplements by ion chromatography |
| title_full_unstemmed | New and feasible method for total phosphorus and sulfur determination in dietary supplements by ion chromatography |
| title_short | New and feasible method for total phosphorus and sulfur determination in dietary supplements by ion chromatography |
| title_sort | new and feasible method for total phosphorus and sulfur determination in dietary supplements by ion chromatography |
| url | http://www.sciencedirect.com/science/article/pii/S1878535218300649 |
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