The Use of a Droplet Collar Accessory Attached to a Portable near Infrared Instrument to Identify Methanol Contamination in Whisky
The aim of this study was to evaluate the ability of a droplet collar accessory attached to a portable near-infrared (NIR) instrument to characterize the artificial contamination of methanol in commercial whisky samples. Unadulterated samples (n = 12) were purchased from local bottle shops where adu...
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| Format: | Article |
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MDPI AG
2023-11-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/21/8969 |
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| author | Adam Kolobaric Rebecca Orrell-Trigg Seth Orloff Vanessa Fraser James Chapman Daniel Cozzolino |
| author_facet | Adam Kolobaric Rebecca Orrell-Trigg Seth Orloff Vanessa Fraser James Chapman Daniel Cozzolino |
| author_sort | Adam Kolobaric |
| collection | DOAJ |
| description | The aim of this study was to evaluate the ability of a droplet collar accessory attached to a portable near-infrared (NIR) instrument to characterize the artificial contamination of methanol in commercial whisky samples. Unadulterated samples (n = 12) were purchased from local bottle shops where adulterated samples were created by adding methanol (99% pure methanol) at six levels (0.5%, 1%, 2%, 3%, 4% and 5% <i>v</i>/<i>v</i>) to the commercial whisky samples (controls). Samples were analyzed using a drop collar accessory attached to a MicroNIR Onsite instrument (900–1650 nm). Partial least squares (PLS) cross-validation statistics obtained for the prediction of all levels of methanol (from 0 to 5%) addition were considered adequate when the whole adulteration range was used, coefficient of determination in cross-validation (R<sup>2</sup><sub>cv</sub>: 0.95) and standard error in cross of validation (SECV: 0.35% <i>v</i>/<i>v</i>). The cross-validation statistics were R<sup>2</sup><sub>cv</sub>: 0.97, SECV: 0.28% <i>v</i>/<i>v</i> after the 0.5% and 1% <i>v</i>/<i>v</i> methanol addition was removed. These results showed the ability of using a new sample presentation attachment to a portable NIR instrument to analyze the adulteration of whisky with methanol. However, the low levels of methanol adulteration (0.5 and 1%) were not well predicted using the NIR method evaluated. |
| first_indexed | 2024-03-11T11:20:24Z |
| format | Article |
| id | doaj.art-64f8642dff1646e1a1666b02d65a9cf6 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T11:20:24Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-64f8642dff1646e1a1666b02d65a9cf62023-11-10T15:12:58ZengMDPI AGSensors1424-82202023-11-012321896910.3390/s23218969The Use of a Droplet Collar Accessory Attached to a Portable near Infrared Instrument to Identify Methanol Contamination in WhiskyAdam Kolobaric0Rebecca Orrell-Trigg1Seth Orloff2Vanessa Fraser3James Chapman4Daniel Cozzolino5School of Science, RMIT University, Melbourne 3000, AustraliaSchool of Science, RMIT University, Melbourne 3000, AustraliaSchool of Science, RMIT University, Melbourne 3000, AustraliaSchool of Science, RMIT University, Melbourne 3000, AustraliaFaculty of Science, University of Queensland, Brisbane 4072, AustraliaCentre for Nutrition and Food Sciences, Queensland Alliance for Agriculture and Food Innovation(QAAFI), University of Queensland, Brisbane 4072, AustraliaThe aim of this study was to evaluate the ability of a droplet collar accessory attached to a portable near-infrared (NIR) instrument to characterize the artificial contamination of methanol in commercial whisky samples. Unadulterated samples (n = 12) were purchased from local bottle shops where adulterated samples were created by adding methanol (99% pure methanol) at six levels (0.5%, 1%, 2%, 3%, 4% and 5% <i>v</i>/<i>v</i>) to the commercial whisky samples (controls). Samples were analyzed using a drop collar accessory attached to a MicroNIR Onsite instrument (900–1650 nm). Partial least squares (PLS) cross-validation statistics obtained for the prediction of all levels of methanol (from 0 to 5%) addition were considered adequate when the whole adulteration range was used, coefficient of determination in cross-validation (R<sup>2</sup><sub>cv</sub>: 0.95) and standard error in cross of validation (SECV: 0.35% <i>v</i>/<i>v</i>). The cross-validation statistics were R<sup>2</sup><sub>cv</sub>: 0.97, SECV: 0.28% <i>v</i>/<i>v</i> after the 0.5% and 1% <i>v</i>/<i>v</i> methanol addition was removed. These results showed the ability of using a new sample presentation attachment to a portable NIR instrument to analyze the adulteration of whisky with methanol. However, the low levels of methanol adulteration (0.5 and 1%) were not well predicted using the NIR method evaluated.https://www.mdpi.com/1424-8220/23/21/8969alcoholadulterationmethanolwhiskyinfrared |
| spellingShingle | Adam Kolobaric Rebecca Orrell-Trigg Seth Orloff Vanessa Fraser James Chapman Daniel Cozzolino The Use of a Droplet Collar Accessory Attached to a Portable near Infrared Instrument to Identify Methanol Contamination in Whisky Sensors alcohol adulteration methanol whisky infrared |
| title | The Use of a Droplet Collar Accessory Attached to a Portable near Infrared Instrument to Identify Methanol Contamination in Whisky |
| title_full | The Use of a Droplet Collar Accessory Attached to a Portable near Infrared Instrument to Identify Methanol Contamination in Whisky |
| title_fullStr | The Use of a Droplet Collar Accessory Attached to a Portable near Infrared Instrument to Identify Methanol Contamination in Whisky |
| title_full_unstemmed | The Use of a Droplet Collar Accessory Attached to a Portable near Infrared Instrument to Identify Methanol Contamination in Whisky |
| title_short | The Use of a Droplet Collar Accessory Attached to a Portable near Infrared Instrument to Identify Methanol Contamination in Whisky |
| title_sort | use of a droplet collar accessory attached to a portable near infrared instrument to identify methanol contamination in whisky |
| topic | alcohol adulteration methanol whisky infrared |
| url | https://www.mdpi.com/1424-8220/23/21/8969 |
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