Analytical Sciences

Quantitative Determination of 2-Ethyl-1-hexanol, Texanol and TXIB in In-door Air Using a Solid-Phase Extraction-type Collection Device Followed by Gas Chromatography–Mass Spectrometry

Ikuo UETA,*1 Risa TAKENAKA,*1 Koji FUJIMURA,*2 Shoji NARUKAMI,*3 Tomohiro SASAKI,*3 and Tsuneaki MAEDA*4

*1 Department of Applied Chemistry, University of Yamanashi, 4-3-11 Takeda, Kofu 400-8511, Japan
*2 Shinwa Chemical Industries Ltd., 50-2 Kagekatsu-cho, Fushimi, Kyoto 612-8307, Japan
*3 HORIBA STEC, Co. Ltd., 11-5 Hokodate-cho, Kamitoba, Minami, Kyoto 601-8116, Japan
*4 Professionals’ Network in Advanced Instrumentation Society, 2-6 Kanda-Awaji-cho, Chiyoda, Tokyo 101-0063, Japan

In this study, in-door air semi-volatile organic compounds (SVOCs) including 2-ethyl-1-hexanol, 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate (texanol), and 2,2,4-trimethyl-1,3-pentanediol diisobutyrate (TXIB), which are scheduled for adding as regulated compounds concerning indoor air reference values in Japan, were quantitatively extracted using a solid-phase extraction-type collection device, followed by sensitively determined by gas chromatography–mass spectrometry. The developed method has shown a good extraction recovery up to an air sampling volume of 900 L. The extracted analytes were quantitatively and rapidly eluted by 7 mL of acetone. The limit of quantification of the analytes were 0.7, 2.1 and 0.2 ng L⁻¹ in air sample at a sampling volume of 300 mL without any concentration of a desorption solvent. The developed method was applied to simultaneous determinations of the investigated target analytes and phthalate esters in real indoor air samples.

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