Ion mobility spectra of selected amines and their application in field testing with the use of a portable IMS device
✍ Scribed by Yan Guo; Miao Qin Lu; Yao Ting Long
- Publisher
- John Wiley and Sons
- Year
- 1997
- Weight
- 284 KB
- Volume
- 1
- Category
- Article
- ISSN
- 1086-900X
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✦ Synopsis
The positive ion mobility spectra of selected amines, N,N-diethyl-p-toluidine, N,N-dimethyl-1-naphthylamine, N-napthyl-ethylenediamine, ethanolamine, nheptylamine, and 2-isopropylaniline were measured with a portable IMS device with lutidine (2,4-dimethyl-pyridine) as the reference compound. The reduced mobilities of the above-mentioned amines were found to be 1.62, 1.60, 2.26, 2.29, 1.51, 1.69 cm respectively, and 2 Ϫ1 Ϫ1 V s , did not vary with different background gases. These amines were compared with several other amines in the literature, and the results of different mobility values of similar amines were explained. The minimum detection limits of N,N-diethyl-p-toluidine, N,N-dimethyl-1-naphthylamine, and N-naphthyl-ethylenediamine were measured to be 0.05, 0.1, and respectively. The re-30 ppb, sponse curve for N,N-diethyl-p-toluidine was nearly linear in the range from 50 to 110 ppb. The response curve for N,N-dimethyl-1-naphthylamine was nearly linear in the range from 30 to 100 ppb. In this article the IMS spectra of background gases, lutidine, and mixtures of amines with three extraction solvents are measured and analyzed. Selective detection of amines achieved by doping NH 3 , ethanol, acetone, and ether into a dilute concentration of amines in air is also discussed. Finally, the results of field tests in a chemical plant are presented.