- 作者: 何國榮
- 作者服務機構: Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, R.O.C.
- 中文摘要: An automated system based on pulse sample introduction membrane extraction and gas chromatography/mass spectrometry (GC/MS) has been developed for on-line monitoring of Trihalomethanes (THMs) in chlorinated drinking water. Pulse samples were injected into the membrane through a sample loop. Zero air was used as the eluent to elute the water samples and also acted as the purging gas. The use of zero air as the purging gas facilitates the cleanup of the membrane to reduce the tailing part of sample input. Under typical operating conditions, the cycle time can be reduced to less than 4 min. The detection limits of this system were found to be about 50 ppt, 50 ppt, 50 ppt, and 20 ppt for CHCl3, CHBrCl2, CHBr2Cl, and CHBr3, respectively. The utility of this system was demonstrated with a ten-hour on-line monitoring of THMs in tap water.
- 英文摘要: --
- 中文關鍵字: Pulse sample introduction; Trihalomethanes (THMs); On-line monitoring; Chlorinated drinking water; Membrane extraction.
- 英文關鍵字: Pulse sample introduction; Trihalomethanes (THMs); On-line monitoring; Chlorinated drinking water; Membrane extraction.