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http://repositoriodigital.ipn.mx/handle/123456789/11649| Título : | Assaying Total Carotenoids in Flours of Corn and Sweetpotato by Laser Photoacoustic Spectroscopy |
| Palabras clave : | Photoacoustic spectroscopy Total carotenoids assay Corn flours Sweetpotato flours |
| Fecha de publicación : | 16-ene-2013 |
| Editorial : | Food Biophysics (2011) 6:12–19 |
| Descripción : | This study describes the application of the
laser photoacoustic spectroscopy (PAS) for quantification of total carotenoids (TC) in corn flours and sweetpotato flours. Overall, thirty-three different corn flours and nine
sweetpotato flours were investigated. All PAS measurements were performed at room temperature using 488-nm argon laser radiation for excitation and mechanical
modulation of 9 and 30 Hz. The measurements were repeated within a run and within several days or months. The UV–Vis spectrophotometry was used as the reference
method. The concentration range that allows for the reliable analysis of TC spans a region from 1 to 40 mg kg−1 for corn flours and from 9 to 40 mg kg−1 for sweetpotato
flours. In the case of sweetpotato flours, the quantification may extend even to 240 mg kg−1 TC. The estimated detection limit values for TC in corn and sweetpotato flours were 0.1 and 0.3 mg kg−1, respectively. The
computed repeatability (n=3–12) and intermediate precision (n=6–28) RSD values at 9 and 30 Hz are comparable: 0.1–17.1% and 5.3–14.7% for corn flours as compared with
1.4–9.1% and 4.2–23.0% for sweetpotato flours. Our results show that PAS can be successfully used as a new analytical tool to simply and rapidly screen the flours for
their nutritional potential based on the total carotenoid concentration. ORIGINAL ARTICLE published in Journals of Science Citation Index Expanded or JCR Centro de Investigacion en Ciencia Aplicada y Tecnologia Avanzada, IPN |
| URI : | http://www.repositoriodigital.ipn.mx/handle/123456789/11649 |
| Otros identificadores : | 1557-1858 http://hdl.handle.net/123456789/1187 |
| Aparece en las colecciones: | Doctorado |
Ficheros en este ítem:
| Fichero | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| Assaying Total Carotenoids in Flours of Corn.pdf | 54.1 kB | Adobe PDF | Visualizar/Abrir |
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