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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Shih, Yung-Han Liu, Wan-Ling Lirio, Stephen Li, Chih-Keng Huang, Hsi-Ya |
| Description | Country affiliation: Taiwan Author Affiliation: Shih YH ( Department of Chemistry, Chung Yuan Christian University, 200 Chung Pei Road, Chung Li District, Taoyuan City 320, Taiwan.); Lirio S ( Department of Chemistry, Chung Yuan Christian University, 200 Chung Pei Road, Chung Li District, Taoyuan City 320, Taiwan.); Li CK ( Department of Chemistry, Chung Yuan Christian University, 200 Chung Pei Road, Chung Li District, Taoyuan City 320, Taiwan.); Liu WL ( Department of Chemistry, Chung Yuan Christian University, 200 Chung Pei Road, Chung Li District, Taoyuan City 320, Taiwan.); Huang HY ( Department of Chemistry, Chung Yuan Christian University, 200 Chung Pei Road, Chung Li District, Taoyuan City 320, Taiwan. Electronic address: hyhuang@cycu.edu.tw.) |
| Abstract | In this study, an effective method for the separation of imidazole derivatives 2-methylimidazole (2-MEI), 4- methylimidazole (4-MEI) and 2-acetyl-4-tetrahydroxybutylimidazole (THI) in caramel colors using cation-selective exhaustive injection and sweeping micellar electrokinetic chromatography (CSEI-sweeping-MEKC) was developed. The limits of detection (LOD) and quantitation (LOQ) for the CSEI-sweeping-MEKC method were in the range of 4.3-80µgL(-1) and 14-270µgL(-1), respectively. Meanwhile, a rapid fabrication activated carbon-polymer (AC-polymer) monolithic column as adsorbent for solid-phase microextraction (SPME) of imidazole colors was developed. Under the optimized SPME condition, the extraction recoveries for intra-day, inter-day and column-to-column were in the range of 84.5-95.1% (<6.3% RSDs), 85.6-96.1% (<4.9% RSDs), and 81.3-96.1% (<7.1% RSDs), respectively. The LODs and LOQs of AC-polymer monolithic column combined with CSEI-sweeping-MEKC method were in the range of 33.4-60.4µgL(-1) and 111.7-201.2µgL(-1), respectively. The use of AC-polymer as SPME adsorbent demonstrated the reduction of matrix effect in food samples such as soft drink and alcoholic beverage thereby benefiting successful determination of trace-level caramel colors residues using CSEI-sweeping-MEKC method. The developed AC-polymer monolithic column can be reused for more than 30 times without any significant loss in the extraction recovery for imidazole derivatives. |
| ISSN | 00219673 |
| Volume Number | 1428 |
| e-ISSN | 18733778 |
| Journal | Journal of Chromatography A |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2016-01-08 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Charcoal Chemistry Chromatography, Micellar Electrokinetic Capillary Food Analysis Methods Imidazoles Analysis Polymers Solid Phase Microextraction Limit Of Detection Journal Article Research Support, Non-u.s. Gov't Discipline Analytical Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Medicine Analytical Chemistry Biochemistry |
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