| Summary: | 碩士 === 逢甲大學 === 化學工程研究所 === 83 === Gas chromatographic (GC)technique was one of the most popular
methods for the quantitative analysis of volatile or semi-
volatile organic compounds. However, the pretreatments of
concentrated sampling, the selection of columns, and the best
separation conditions for the GC technique were tedious and
complicated. Although the couple instruments of gas
chromatography with mass spectrometer (GC/MS) were used
successfully in both qualitative and quantitative analyses for
the muticomponent sample. The usage of the GC/MS was not
economical because of high costs and hard maintenance of mass
spectrometer. Fourier Transform Infrared Spectroscopy(FTIR)
with long path gas cell was an alternative technique for the
analysis of gas samples. In this investigation, thirteen
aliphatic chlorides : 1,2-Dichloroethane,
1,1,1-Trichloroethane, Tetrachloroethylene, Trichloroethylene,
1,2-Dichloropro-pane, 1,3-Dichloropropane , Carbon
tetrachloride, Chloroform, Dichloromethane, 1,1-Dichloroethane,
trans-1,2-Dichloroethylene, 1,1,2-Trichloroethane,
1,1,2,2-Tetrachloroethane were analyzed. The concentration of
single component compound was obtained by FTIR technique down
to 7 ppm. The multicomponent samples of ten aliphatic chlorides
mixtures were also analyzed simultaneous from FTIR method. The
results were calculated and compared with those from GC/FID
technique. They were consistent within 12% 。
|
|---|
