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Duong S, Strobel N, Buddhadasa S, Stockham K, Auldist M, Wales B, Orbell J, Cran M. Rapid measurement of phytosterols in fortified food using gas chromatography with flame ionization detection. Food Chem 2016; 211:570-6. [PMID: 27283669 DOI: 10.1016/j.foodchem.2016.05.104] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 04/06/2016] [Accepted: 05/16/2016] [Indexed: 11/30/2022]
Abstract
A novel method for the measurement of total phytosterols in fortified food was developed and tested using gas chromatography with flame ionization detection. Unlike existing methods, this technique is capable of simultaneously extracting sterols during saponification thus significantly reducing extraction time and cost. The rapid method is suitable for sterol determination in a range of complex fortified foods including milk, cheese, fat spreads, oils and meat. The main enhancements of this new method include accuracy and precision, robustness, cost effectiveness and labour/time efficiencies. To achieve these advantages, quantification and the critical aspects of saponification were investigated and optimised. The final method demonstrated spiked recoveries in multiple matrices at 85-110% with a relative standard deviation of 1.9% and measurement uncertainty value of 10%.
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Affiliation(s)
- Samantha Duong
- Australian Government, National Measurement Institute (NMI), 1/153 Bertie Street, Port Melbourne, VIC 3207, Australia; Institute for Sustainability and Innovation, College of Engineering and Science, Victoria University, P.O. Box 14428, Melbourne, VIC 8001, Australia
| | - Norbert Strobel
- Australian Government, National Measurement Institute (NMI), 1/153 Bertie Street, Port Melbourne, VIC 3207, Australia
| | - Saman Buddhadasa
- Australian Government, National Measurement Institute (NMI), 1/153 Bertie Street, Port Melbourne, VIC 3207, Australia
| | - Katherine Stockham
- Australian Government, National Measurement Institute (NMI), 1/153 Bertie Street, Port Melbourne, VIC 3207, Australia
| | - Martin Auldist
- Department of Environment and Primary Industry (DEPI), 1301 Hazeldean Road, Ellinbank, VIC 3821, Australia
| | - Bill Wales
- Department of Environment and Primary Industry (DEPI), 1301 Hazeldean Road, Ellinbank, VIC 3821, Australia
| | - John Orbell
- Institute for Sustainability and Innovation, College of Engineering and Science, Victoria University, P.O. Box 14428, Melbourne, VIC 8001, Australia
| | - Marlene Cran
- Institute for Sustainability and Innovation, College of Engineering and Science, Victoria University, P.O. Box 14428, Melbourne, VIC 8001, Australia.
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