New Perspectives of Quantum Dots in the Food Field: Determination of beta-Carotene in Tropical Fruit Juices and Food Supplements

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Jimenez Lopez, J (Author) Other; Joao L M Santos (Author) FFUP; Ortega Barrales, P (Author) Other; Ruiz Medina, A (Author) Other

Journal

Title: Food Analytical Methods

Vol. 10

Pages: 2412-2421

ISSN: 1936-9751

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 1 Citation

Scopus - 1 Citation

Other information

Authenticus ID: P-00M-CK2

DOI: 10.1007/s12161-017-0811-8

Abstract (EN): A novel and simple method for the determination of beta-carotene, a carotenoid abundant in plants and fruits, is proposed. Multicommutated flow injection analysis (MCFIA) has been applied as automated flow methodology to the analysis of beta-carotene in tropical fruit juices and food supplements, making use of the quenching effect caused by this analyte over glutathione-capped CdTe quantum dots (QDs) fluorescence signal. Under optimized conditions, the method was linear in the range of 0.3-15 mu g mL(-1), with a detection limit of 0.09 mu g mL(-1) and relative standard deviations lower than 3%. The determination rate was of about 80 h(-1), and results were in good agreement with those provided by both the manufacturer and a chromatographic reference method.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10