Comparison of Dilution, Filtration, and Microwave Digestion Sample Pretreatments in Elemental Profiling of Wine by ICP-MS
Wine elemental composition varies by cultivar, geographic origin, viticultural and enological practices, and is often used for authenticity validation. Elemental analysis of wine by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) is challenging due to the potential for non-spectral interferenc...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-09-01
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| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/22/10/1609 |
| _version_ | 1818535138701606912 |
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| author | Joshua Godshaw Helene Hopfer Jenny Nelson Susan E. Ebeler |
| author_facet | Joshua Godshaw Helene Hopfer Jenny Nelson Susan E. Ebeler |
| author_sort | Joshua Godshaw |
| collection | DOAJ |
| description | Wine elemental composition varies by cultivar, geographic origin, viticultural and enological practices, and is often used for authenticity validation. Elemental analysis of wine by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) is challenging due to the potential for non-spectral interferences and plasma instability arising from organic matrix components. Sample preparation mitigates these interferences, however, conflicting recommendations of best practices in ICP-MS analysis of wine have been reported. This study compared direct dilution, microwave-assisted acid digestion, and two filtration sample pretreatments, acidification prior to filtration and filtration followed by acidification, in elemental profiling of one white and three red table wines by ICP-MS. Of 43 monitored isotopes, 37 varied by sample preparation method, with significantly higher results of 17 isotopes in the microwave-digested samples. Both filtration treatments resulted in lower results for 11 isotopes compared to the other methods. Finally, isotope dilution determination of copper based on natural abundances and the 63Cu:65Cu instrument response ratio agreed with external calibration and confirmed a significant sample preparation effect. Overall, microwave digestion did not compare favorably, and direct dilution was found to provide the best compromise between ease of use and result accuracy and precision, although all preparation strategies were able to differentiate the wines. |
| first_indexed | 2024-12-11T18:20:51Z |
| format | Article |
| id | doaj.art-b79f5493eff04adebcd65b5cee0eabb5 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-12-11T18:20:51Z |
| publishDate | 2017-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-b79f5493eff04adebcd65b5cee0eabb52022-12-22T00:55:16ZengMDPI AGMolecules1420-30492017-09-012210160910.3390/molecules22101609molecules22101609Comparison of Dilution, Filtration, and Microwave Digestion Sample Pretreatments in Elemental Profiling of Wine by ICP-MSJoshua Godshaw0Helene Hopfer1Jenny Nelson2Susan E. Ebeler3Department of Viticulture & Enology, University of California, One Shields Ave, Davis, CA 95616, USADepartment of Food Science, The Pennsylvania State University, 202 Food Science Building, University Park, PA 16802, USADepartment of Viticulture & Enology, University of California, One Shields Ave, Davis, CA 95616, USADepartment of Viticulture & Enology, University of California, One Shields Ave, Davis, CA 95616, USAWine elemental composition varies by cultivar, geographic origin, viticultural and enological practices, and is often used for authenticity validation. Elemental analysis of wine by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) is challenging due to the potential for non-spectral interferences and plasma instability arising from organic matrix components. Sample preparation mitigates these interferences, however, conflicting recommendations of best practices in ICP-MS analysis of wine have been reported. This study compared direct dilution, microwave-assisted acid digestion, and two filtration sample pretreatments, acidification prior to filtration and filtration followed by acidification, in elemental profiling of one white and three red table wines by ICP-MS. Of 43 monitored isotopes, 37 varied by sample preparation method, with significantly higher results of 17 isotopes in the microwave-digested samples. Both filtration treatments resulted in lower results for 11 isotopes compared to the other methods. Finally, isotope dilution determination of copper based on natural abundances and the 63Cu:65Cu instrument response ratio agreed with external calibration and confirmed a significant sample preparation effect. Overall, microwave digestion did not compare favorably, and direct dilution was found to provide the best compromise between ease of use and result accuracy and precision, although all preparation strategies were able to differentiate the wines.https://www.mdpi.com/1420-3049/22/10/1609ICP-MSsample preparationwine analysisisotope dilutionelemental profiling |
| spellingShingle | Joshua Godshaw Helene Hopfer Jenny Nelson Susan E. Ebeler Comparison of Dilution, Filtration, and Microwave Digestion Sample Pretreatments in Elemental Profiling of Wine by ICP-MS Molecules ICP-MS sample preparation wine analysis isotope dilution elemental profiling |
| title | Comparison of Dilution, Filtration, and Microwave Digestion Sample Pretreatments in Elemental Profiling of Wine by ICP-MS |
| title_full | Comparison of Dilution, Filtration, and Microwave Digestion Sample Pretreatments in Elemental Profiling of Wine by ICP-MS |
| title_fullStr | Comparison of Dilution, Filtration, and Microwave Digestion Sample Pretreatments in Elemental Profiling of Wine by ICP-MS |
| title_full_unstemmed | Comparison of Dilution, Filtration, and Microwave Digestion Sample Pretreatments in Elemental Profiling of Wine by ICP-MS |
| title_short | Comparison of Dilution, Filtration, and Microwave Digestion Sample Pretreatments in Elemental Profiling of Wine by ICP-MS |
| title_sort | comparison of dilution filtration and microwave digestion sample pretreatments in elemental profiling of wine by icp ms |
| topic | ICP-MS sample preparation wine analysis isotope dilution elemental profiling |
| url | https://www.mdpi.com/1420-3049/22/10/1609 |
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