Main content area

Determination of Seven Odorants in Purified Water Among Worldwide Brands by HS-SPME Coupled to GC–MS

Peng, Shifu, Ding, Zhen, Zhao, Lei, Fei, Juan, Xuan, Zhoubin, Huang, Chenxi, Chen, Xiaodong
Chromatographia 2014 v.77 no.9-10 pp. 729-735
2-methylisoborneol, aesthetics, beta-ionone, consumer acceptance, drinking water, gas chromatography-mass spectrometry, geosmin, headspace analysis, odor compounds, odors, solid phase microextraction
Musty and earthy odors dramatically influence the esthetic quality and consumer acceptability of drinking water. This study was conducted to obtain a sensitive method for simultaneous analysis of seven odors, including geosmin (GSM), 2-methylisoborneol (2-MIB), 2-isopropyl-3-methoxy pyrazine (IPMP), dimethyl trisulfide (DMTS), 2,4,6-trichloroanisole (2,4,6-TCA), β-cyclocitral, and β-ionone, in water by applying headspace solid phase micro-extraction coupled to gas chromatography with mass spectrometry. Moreover, the proposed method was applied to obtain preliminary understanding of the levels of these odorants in purified water among various brands in the world, and to try to find out the potential causes when the odorants appeared in purified water. The target compounds could be separated and analyzed effectively within 23 min, and the GSM and DMTS could be detected in all brands of chosen countries, while the IPMP, β-ionone and 2,4,6-TCA cannot be observed in the above brands.