Dendrimeric nanostructure polymer solid phase microextraction fiber coating for determination of organic pollutants water sample

Dendrimeric nanostructure was prepared and used as a fiber coating for headspace solid phase microextraction of selected triazolic agrochemicals from water samples prior to their quantification by a combination of gas chromatography and mass spectrometry [1]. Dendrimeric nanostructure with high surface area was characterized by of thermogravimetric analysis (TGA), ultraviolet–visible (UV-Vis) spectroscopy, and field emission scanning electron microscopy (FE-SEM). It was immobilized on a stainless steel wire for fabrication of a fiber for SPME. Experimental conditions for fiber coating, extraction time, stirring rate, ionic strength, pH value, desorption temperature and desorption time were optimized [2,3]. Under optimum conditions, the repeatability for one fiber (for n = 3) ranges from 4.28% and 5.63% (relative standard deviation). The detection limits are between 8 and 12 pgmL‾¹. The method is simple, fast, low-cost (in terms of equipment), and the fiber used for SPME has high thermal stability and good recovery.