119
Views
3
CrossRef citations to date
0
Altmetric
Original Articles

An isotope dilution headspace method with gas chromatography–mass spectrometry for determination of propylene oxide in food

&
Pages 482-486 | Received 25 Aug 2008, Accepted 18 Oct 2008, Published online: 05 May 2009
 

Abstract

A method based on isotope dilution headspace and gas chromatography–mass spectrometry was developed for the determination of propylene oxide in foods. Optimum method sensitivity was achieved by the addition of NaCl in water at saturation and with the sample solution incubated at 90°C. The method had good repeatability with relative standard deviations of 6.0, 7.6 and 2.2% at 5, 20 and 40 µg l−1, respectively. The method was used to determine propylene oxide in 36 selected food composite samples from the 2007 Canadian total diet study. Propylene oxide was not detected in any samples analyzed with an average method detection limit of 0.5 ng g−1. Hydrolysis of propylene oxide in water was observed as a first-order reaction with a half-life of 15 h at room temperature and less than 10 min at 90°C. This confirms that it is very unlikely to find propylene oxide in foods as consumed due to its volatility and reaction with water.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.