Stable gas measurement of aging body odor chemical, trans-2-nonenal by co-evaporation with cyclohexane

초록

Trans-2-nonenal is a volatile aldehyde associated with aging-related body odor generated by oxidative degradation of human skin lipids and is a key target compound in cosmetics, textile, and food quality control. Owing to its high volatility, quantitative analysis of trans-2-nonenal often requires additional pretreatment steps and careful control of experimental conditions. However, it still has limited reliability and demands extensive laboratory equipment for testing. To cover these issues, a solvent-assisted analytical strategy was proposed for stable analysis with small scale by introducing solvent filling the headspace with trans-2-nonenal like makeup gas of gas analysis. To find out applicable solvent, solvent screening was performed and showed cyclohexane was the suitable solvent giving the high gas chromatography signal of trans-2-nonenal at 20 °C for 15 min. It resulted in 56 ppm of theoretical limit of detection and high linearity (r2 = 0.99), and the property of solvent dipolarity/polarizability (π*) (r2 = 0.92) was found to influence co-evaporation of trans-2-nonenal with solvent analyzed by linear solvation energy relationship analysis. When the interaction of various carbohydrate based candidates with trans-2-nonenal was examined, acidic polysaccharide (A.P) from Rhizobium leguminosarum VF39 exhibited 63.0% of decrease of gaseous trans-2-nonenal, indicating its potential as a novel capture material for trans-2-nonenal and A.P showed 51.4% of capturing performance in deodorant property test. Overall, this study showed that novel cyclohexane based analysis for trans-2-nonenal with small scale and it provides a basis for quantitative analysis and screening of novel interacting molecules with trans-2-nonenal. © The Author(s), under exclusive licence to The Korean Society for Biotechnology and Bioengineering 2026.

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