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A novel multi-commutated method for the determination of hydroxytyrosol in enriched foods using mercaptopropionic acid-capped CdTe quantum dots

Title
A novel multi-commutated method for the determination of hydroxytyrosol in enriched foods using mercaptopropionic acid-capped CdTe quantum dots
Type
Article in International Scientific Journal
Year
2013
Authors
Llorent Martinez, EJ
(Author)
Other
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Molina Garcia, L
(Author)
Other
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Fernandez de Cordova, ML
(Author)
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Santos, JLM
(Author)
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Rodrigues, SSM
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Ruiz Medina, A
(Author)
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Scientific classification
FOS: Agrarian Sciences > Other Agrarian Sciences
Other information
Authenticus ID: P-006-7S8
Abstract (EN): Hydroxytyrosol (HXT) has been reported to have beneficial effects for human health, such as antioxidant and antimicrobial properties and an important contribution to the prevention of cardiovascular disease. Hence, exhaustive research is currently being performed to prepare functional foods, such as tomato juice or milk, with HXT. This paper presents a multi-commutated flow method based on the quenching effect that HXT has on the fluorescence of water-soluble mercaptopropionic acid-capped CdTe quantum dots. Under optimal conditions a linear working range was obtained for concentrations between 10 and 250ng mu l(-1). In order to demonstrate the suitability of the proposed method for the determination of HXT, HXT-enriched samples were prepared. Using a QuEChERS (quick, easy, cheap, effective, rugged and safe) procedure for extraction, HXT was determined in the prepared functional foods (milk, infant formula, tomato juice and tomato soup). Recoveries of 100%+/- 8%, relative standard deviations (RSDs) lower than 5% and high sample throughput of 70 samples per h show the potential of the system for the analysis of HXT in food samples.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 8
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