Quantitative determination of compounds in tobacco essential oils by comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry

Qualitative and quantitative approaches in comprehensive two-dimensional gas chromatography

“…The Roasted barley MS libraries and confirmed by manual inspection [116] Aerosols from coniferous forest MS libraries and retention index [117] Tobacco essential oils MS libraries [118] Essential oils Retention index and MS libraries [119] identification of analytes can be accomplished by interpretation of electron impact mass spectra, or by comparing the spectra to mass spectral databases. However, despite the use of such databases, the identification of unknown analytes can be a tedious task.…”

Chemical composition and antifungal activity of Salvia desoleana Atzei & Picci essential oil and its major components

“…The contents of these constituents in the oil were determined from the appropriate calibration curves. Since linalyl acetate and α-terpinyl acetate belong to the same class of compounds and are also isomers, and it is known that such similar compounds gave the same response of FID, [13] the calibration curve of the first acetate was used for both of them.…”

Comparison of comprehensive two-dimensional gas chromatography/time-of-flight mass spectrometry and gas chromatography–mass spectrometry for the analysis of tobacco essential oils

“…A method of multiple internal standards calibration was used for quantitative determination of compounds in the essential oils. The validation and advantages of multiple internal standards calibration has been investigated in another paper of our group [20]. The response factors for ethyl acetate, 1-propanol, 3-(1-methyl-2-pyrrolidinyl)-pyridine and 2-ethyl-3-hydroxy-4H-pyran-4-one were selected to represent the response factors for ester, alcohol, pyridine and ketone classes, respectively.…”