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Ion mobility spectrometry(IMS)is a very fast,highly sensitive,and inexpensive technique,it permits effcient monitoring ofvolatile organic compounds like alcohols.In this article,positive ion mobility spectra for six alcohol organic compounds have beensystematically studied for the first time using a high-resolution IMS apparatus equipped with a discharge ionization source.Utilizingprotonated water cluster ions(H2O)nH+as the reactant ions and clean air as the drift gas,alcohol organic compounds,ethanol,1-propanol,2-propanol,1-butanol,1-pentanol and 2-octanol,all exhibit product ion characteristic peaks in their respective ion mobilityspectrometry,that is a result of proton transfer reactions between the alcohols and reaction ions(H2O)nH+.The mixture of thesealcohols,including two isomers,has been detected,and the results showed that they could be distinguished effectively in the ionmobility spectrum.The reduced mobility values have been determined,which are in very well agreement with the traditional 63Ni-IMSexperimental values.The exponential dilution method was used to calibrate the alcohol concentrations,and a detection limit availablefor the alcohols is in order of magnitude of a few ng/L.
Ion mobility spectrometry (IMS) is a very fast, highly sensitive, and inexpensive technique, it permits effcient monitoring of volatile organic compounds like alcohols. In this article, positive ion mobility spectra for six alcohol organic compounds have been systematically studied for the first time using a high-resolution IMS apparatus equipped with a discharge ionization source. Utilizingprotonated water cluster ions (H2O) nH + as the reactant ions and clean air as the drift gas, alcohol organic compounds, ethanol, 1-propanol, 2-propanol, 1-butanol , 1-pentanol and 2-octanol, all exhibit product ion characteristic peaks in their respective ion mobilityspectrometry, that is a result of proton transfer reactions between the alcohols and reaction ions (H2O) nH +. The mixture of thesealcohols, including two isomers, has been detected, and the results showed that they could be distinguished effectively in the ion mobility spectrum. reduced mobility values have been determined, which are in very well agreement with t he traditional 63 Ni-IMSexperimental values.The exponential dilution method was used to calibrate the alcohol concentrations, and a detection limit available for the alcohols is in order of magnitude of a few ng / L.