Nanocomposite Trimethylsilyl-Modified Nafion/SBA-15 for Extraction and Analysis of the Volatile Compounds from Nepeta haussknechtii Bornm

Abstract

Headspace solid-phase microextraction (HS-SPME) using a type of SBA-15 was made more hydrophobic by modification with ethoxy trimethyl silane to obtain a hybrid organicinorganic mesoporous nanocomposite, which then was impregnated with Nafion for the collection and detection of the volatile compounds of Nepeta haussknechtii Bornm. Experimental parameters, such as sample weight, extraction temperature, humidity effect, desorption time, and desorption temperature, were examined and optimized. Using HS-SPME followed by GC–MS, 42 compounds were separated and identified. HS-SPME has the benefits of small sample size, timesaving, cheapness, and simplicity, compared to hydrodistillation (HD). As we know, this is the first report on utilizing Nafion/SBA-15 fiber within solid-phase microextraction attached to headspace for assessing medicinal plant’s volatile fraction.