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Molecules

Title:		Characterization of Volatile Compounds in Four Different Rhododendron Flowers by GCxGC-QTOFMS
Author(s):		Qian CY; Quan WX; Xiang ZM; Li CC;
Address:		"Guangdong Provincial Key Laboratory of Emergency Test for Dangerous Chemicals/Guangdong Engineering and Technology Research Center for Ambient Mass Spectrometry, Guangdong Institute of Analysis, Guangzhou 510070, China. qianchenyu94@163.com. Guizhou Provincial Key Laboratory of Mountainous Environmental Protection, Guizhou Normal University, Guiyang 550001, China. qianchenyu94@163.com. Guizhou Provincial Key Laboratory of Mountainous Environmental Protection, Guizhou Normal University, Guiyang 550001, China. wenxuanq@gznu.edu.cn. Guangdong Provincial Key Laboratory of Emergency Test for Dangerous Chemicals/Guangdong Engineering and Technology Research Center for Ambient Mass Spectrometry, Guangdong Institute of Analysis, Guangzhou 510070, China. xiangzm@live.com. Guizhou Provincial Key Laboratory of Mountainous Environmental Protection, Guizhou Normal University, Guiyang 550001, China. chaochanl@gznu.edu.cn"
Journal Title:		Molecules
Year:		2019
Volume:		20190912
Issue:		18
Page Number:		-
DOI:		10.3390/molecules24183327
ISSN/ISBN:		1420-3049 (Electronic) 1420-3049 (Linking)
Abstract:		"Volatile compounds in flowers of Rhododendron delavayi, R. agastum, R. annae, and R. irroratum were analyzed using comprehensive two-dimensional gas chromatography-mass spectrometry (GCxGC) coupled with high-resolution quadrupole time-of-flight mass spectrometry (QTOFMS). A significantly increased number of compounds was separated by GCxGC compared to conventional one-dimensional GC (1DGC), allowing more comprehensive understanding of the volatile composition of Rhododendron flowers. In total, 129 volatile compounds were detected and quantified. Among them, hexanal, limonene, benzeneacetaldehyde, 2-nonen-1-ol, phenylethyl alcohol, citronellal, isopulegol, 3,5-dimethoxytoluene, and pyridine are the main compounds with different content levels in all flower samples. 1,2,3-trimethoxy-5-methyl-benzene exhibits significantly higher content in R. irroratum compared to in the other three species, while isopulegol is only found in R. irroratum and R. agastum"
Keywords:		"Acyclic Monoterpenes/analysis Aldehydes/analysis Chromatography, Gas Cyclohexane Monoterpenes/analysis Flowers/*chemistry Gas Chromatography-Mass Spectrometry/methods Limonene/analysis Mass Spectrometry Odorants/*analysis Rhododendron/*chemistry Solid Pha;"
Notes:		"MedlineQian, Chen-Yu Quan, Wen-Xuan Xiang, Zhang-Min Li, Chao-Chan eng No. 2018GDASCX-0808, 2019GDASYL-0302004 and 2017GDASCX-0104/GDAS' Project of Science and Technology Development/ Comparative Study Switzerland 2019/09/25 Molecules. 2019 Sep 12; 24(18):3327. doi: 10.3390/molecules24183327"