Characterisation of a Microwave-induced Plasma Atomic Emission Spectrometry System Using a Modified Plasma Torch Coupled With Pneumatic and Hydraulic High-pressure Nebulization

摘要: The analytical potential of a modified plasma torch was examined by the determination Cr, Fe and Mn in aqueous solutions. microwave-induced plasma sustained rectangular-type TE 101 cavity with a power 500 W. Argon used as the gas. Sample introduction was carried out using pneumatic nebulizer coupled cyclone spray chamber also hydraulic high-pressure nebulizer. A computer-controlled monochromator background correction for detection emission lines analytes. detection limits of the analytes varied from 0.09 to 0.97 µg ml -1 . The short-term stability long-term precision were measured monitoring the intensity 279.482 nm line ( n =10) found to be 3 4%, respectively. excitation gas temperatures the microwave induced evaluated atoms and OH - radicals thermometric species. temperatures obtained Boltzmann plots 4600±230 2500±60 K, respectively.