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Trace-level screening of dichlorophenols in processed dairy milk by headspace gas chromatography


Gras, K and Luong, J and Gras, R and Shellie, RA, Trace-level screening of dichlorophenols in processed dairy milk by headspace gas chromatography, Journal of Separation Science, 39, (20) pp. 3957-3963. ISSN 1615-9314 (2016) [Refereed Article]

Copyright Statement

Copyright 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

DOI: doi:10.1002/jssc.201600748


A headspace gas chromatographic approach based on flame ionization detection has been successfully developed for the determination of parts-per-billion levels of 2,4-dichlorophenol and 2,6-dichlorophenol in processed dairy milk. Under the right environmental conditions, these compounds are produced as products of the reductive dechlorination of pentachlorophenol. Maintaining a highly inert chromatographic system and employing a recently commercialized inert capillary column permits the analysis of 2,4-dichlorophenol and 2,6-dichlorophenol without derivatization. Further, a detection limit improvement of more than a factor of two was achieved by adding sodium sulfate to substantially decrease the solute partition coefficient in the matrix. A detection limit of 1 ng/g and a limit of quantitation of 2 ng/g were attained, and complete analysis can be conducted in < 13 min. Reproducibility of area counts over a range from 20 to 200 ng/g and over a period of 2 days were found to be less than 6% (n = 20). A linear range from 5 to 500 ng/g with a correlation coefficient of at least 0.9992 was obtained for 2,4-dichlorophenol and 2,6-dichlorophenol. Spike recoveries from 10 to 500 ng/g for all the analytes range from 92 to 102%.

Item Details

Item Type:Refereed Article
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Separation science
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Luong, J (Mr Jim Luong)
UTAS Author:Gras, R (Ms Ronda Gras)
UTAS Author:Shellie, RA (Professor Robert Shellie)
ID Code:115246
Year Published:2016
Web of Science® Times Cited:7
Deposited By:Chemistry
Deposited On:2017-03-10
Last Modified:2022-08-22

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