title: Photoacoustic approach to direct determination of the total phenolic content in red sorghum flours.
abstract: Photoacoustic (PA) spectroscopy in the ultraviolet and visible was demonstrated to be a suitable tool for direct determination of total phenolic content in red sorghum flours. The PA spectra obtained feature two characteristic peaks: the first centered at 285 nm is due to the aromatic amino acids, while the second one at 335 nm is associated with the total phenolic content. The outcome of the PA study was compared with the results obtained by a conventional, tedious Folin-Ciocalteau chemical method. Statistical analysis indicates no significant difference between the two methods used in this study.
authors.affiliation: Department of Physics, Faculty of Agriculture and Food Sciences, University of West Hungary, POB 90, 9201 Mosonmagyaróvár, Hungary. dokao@mtk.nyme.hu
authors.forename: Otto
authors.initials: O
authors.lastname: Dóka
authors.forename: Dane D
authors.initials: DD
authors.lastname: Bicanic
authors.forename: Mamoudou H
authors.initials: MH
authors.lastname: Dicko
authors.forename: Maja A
authors.initials: MA
authors.lastname: Slingerland
mesh_terms: D000162:Acoustics; D005433:Flour / Q000032:analysis*; D045868:Sorghum / Q000737:chemistry*; D013057:Spectrum Analysis / Q000379:methods*