*3.10. Identification and Quantification of Volatile Organic Compounds*

All main organic compounds of the volatile extracts were identified by comparing their mass spectra with those of internal reference libraries (Adams, NIST). Additionally, the identification of *α*-pinene, *α*- and *γ*-terpinene, *β*-caryophyllene, borneol, carvacrol, limonene, linalool, myrcene, *p*-cymene, sabinene, and thymol was confirmed by authentic reference standards by comparing their individual retention indices. Quantitative data of each main compound were obtained with serial dilutions of external standard solutions using at least six known concentrations (*β*-caryophyllene, *cis*-sabinene hydrate and linalool: 0.5, 1, 2, 5, 10, and 50 ng µL −1 ; *α*-pinene, *α*-terpinene, borneol, limonene, myrcene, and sabinene: 1, 2, 5, 10, 50, and 100 ng µL −1 ; *p*-cymene: 1, 2, 5, 10, 50, 100, 200, and 400 ng µL −1 ; *γ*-terpinene: 1, 2, 5, 10, 50, 100, 200, 400, and 600 ng µL −1 ; carvacrol: 1, 2, 5 10, 50, 100, 200, 400, 600, and 1200 ng µL −1 ; thymol: 5, 10, 50, 100, 200, 400, 600, 1200, and 1800 ng µL −1 ), which covered concentration ranges detected for each compound in all samples.
