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Determination of sunset yellow in multi-vitamin tablets by photoacoustic spectroscopy and a comparison with alternative methods

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Photoacoustic (PA) spectroscopy in the visible wavelength region was shown to be suitable for a direct (no preparatory steps involved) quantification of sunset yellow (E110) colour in effervescent multi-vitamin tablets. Measurements on powdered tablets containing E110 were performed at 480?nm at which wavelength this synthetic colour shows appreciable absorbance. The PA data obtained were compared to the results acquired by diffuse reflectance spectroscopy and conventional spectrophotometry. Intrinsic simplicity, ease of sampling and rapid response were the most important advantages of the PA technique. In terms of sensitivity the performance of the three methods were comparable.
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Keywords: Sunset yellow; diffuse reflectance spectroscopy; multi-vitamin tablets; photoacoustic spectroscopy; spectrophotometry

Document Type: Research Article

Affiliations: 1: Department of Physics, Faculty of Agricultural and Food Sciences, University of West Hungary, POB 90, H-9201 Mosonmagyaróvár, Hungary 2: Department of Agrotechnology and Food Sciences, Laser Photoacoustic Laboratory, Biophysics Division, Wageningen University, Dreijenlaan 3, 6703 HA Wageningen, The Netherlands 3: Institute of Food Science, Department of Food Quality Assurance, Faculty of Agricultural and Food Sciences, University of West Hungary, H-9200 Mosonmagyaróvár, Lucsony str. 15-17, Hungary 4: Biophysics Division, Wageningen University, Dreijenlaan 3, 6703 HA Wageningen, The Netherlands

Publication date: June 1, 2005

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