DETERMINATION OF LOW CONCENTRATION TRINITROTOLUENE CONTENT IN WATER SAMPLES

摘要

Polynitroaromatic organic explosives (2,4,6-trinitrotoluene) are typical labile and environmental that can transform with soil indigenous microorganisms, photodegrade by sunlight and migrate though subsurface soil to cause groundwater contamination. To be able to determine the type and concentration of explosives and their (bio)transformation products in different soil environments, a comprehensive analytical methodology of sample preparation, separation and detection in thus required. This present paper describes the use of solid-phase microextraction (SPME) and solid-phase extraction (SPE) for the extraction of nitroaromatic explosives for subsequent analysis by either GC/MS or HPLC/UV. The two techniques are examined in terms of procedure, chromatographic analysis and method performance.The adsorption temperature and adsorption times were examined by the using SPME fiber. SPE extraction was done by variable columns and microcolumns and was examined the columns with high efficiency and with short sorption time.