By a News Reporter-Staff News Editor at Food Weekly News -- Current study results on Agriculture and Food Chemistry have been published. According to news originating from Tianjin, People's Republic of China, by VerticalNews correspondents, research stated, "A method based on headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry was developed for the analysis of volatile methoxyphenolic compounds in pu-erh tea. Six fibers with different polarities were initially evaluated."
Our news journalists obtained a quote from the research from the Tianjin University of Science and Technology, "The 75 ?m carboxen/polydimethylsiloxane fiber exhibited the highest extraction efficiency and was selected for further optimization. A Plackett-Burman design was used to screen for the brewing proportion of tea and water, amount of pu-erh tea, ionic strength, extraction time, extraction temperature, desorption time, rate of agitation, and equilibrium time. A Box-Behnken design was then applied to optimize the significant factors. Under optimal conditions, the proposed method affords a wide range of linearity, high linear regression coefficients (0.996-0.999), less than 9.0% repeatability of relative standard deviation, and limits of detection ranging from 2.31 to 21.80 ng/g. The proposed method has satisfactory accuracy, with recoveries of 79.08-113.9%."
According to the news editors, the research concluded: "This method was successfully applied for the analysis of pu-erh tea samples."
For more information on this research see: Optimization of headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry for detecting methoxyphenolic compounds in pu-erh tea. Journal of Agricultural and Food Chemistry, 2013;61(3):561-8. (American Chemical Society - www.acs.org; Journal of Agricultural and Food Chemistry - www.pubs.acs.org/journal/jafcau)
The news correspondents report that additional information may be obtained from L. Du, Key Laboratory of Industrial Fermentation Microbiology Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, People's Taiwan. Additional authors for this research include C. Wang, J. Li, D. Xiao, C. Li and Y. Xu.
Keywords for this news article include: Asia, Tianjin, People's Republic of China, Agriculture and Food Chemistry.
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