Analytical Sciences

Identification of Gas Emanated from Human Skin: Methane, Ethylene, and Ethane

Kazutoshi NOSE,*¹ Yoko NUNOME,*¹ Takaharu KONDO,*² Syuki ARAKI,*³ and Takao TSUDA*⁴

*1 Department of Materials Science & Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
*2 Research Center of Health, Physical Fitness and Sports, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8601, Japan
*3 OMOHI College, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
*4 Incubation Center Office 5, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan

We investigated whether methane, ethylene and ethane gas can be detected in gas emanating from human skin, which is called skin gas. Skin gas was collected with a homemade stainless-steel trap system, which was cooled with liquid nitrogen, and analyzed with a gas chromatograph fitted with a flame ionization detector (FID). Skin-gas samples were obtained by covering a hand for 30 min with a polyfluorovinyl bag in which pure helium gas was introduced. The bag, the trap system and GC were set up online to avoid any contamination by air. Methane, ethylene and ethane in skin gas were successfully collected at an average amount emanated for 30 min (from ten subjects) of 150 ± 63, 20 ± 11 and 17 ± 8 [mean ± SD] pg/cm², respectively.

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