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Characterization of Volatile Compounds in Four Different Rhododendron Flowers by GC×GC-QTOFMS.

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 (GC×GC) coupled with high-resolution quadrupole time-of-flight mass spectrometry (QTOFMS). A significantly increased number of compounds was separated by GC×GC 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.

SUBMITTER: Qian CY

PROVIDER: S-EPMC6767277 | biostudies-other | 2019 Sep

REPOSITORIES: biostudies-other

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Characterization of Volatile Compounds in Four Different Rhododendron Flowers by GC×GC-QTOFMS.

Qian Chen-Yu CY Quan Wen-Xuan WX Xiang Zhang-Min ZM Li Chao-Chan CC

Molecules (Basel, Switzerland) 20190912 18

Volatile compounds in flowers of Rhododendron delavayi, R. agastum, R. annae, and R. irroratum were analyzed using comprehensive two-dimensional gas chromatography-mass spectrometry (GC×GC) coupled with high-resolution quadrupole time-of-flight mass spectrometry (QTOFMS). A significantly increased number of compounds was separated by GC×GC compared to conventional one-dimensional GC (1DGC), allowing more comprehensive understanding of the volatile composition of Rh ...[more]

PMID: 31547401

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