ABSTRACT The methodology of simultaneous multi-element electrothermal atomic absorption spectrometry (SMET AAS) has been developed based on the pulse vaporization of samples in a fast heated tube atomizer, CCD detection of transitory radiation from continuum source within 210-410 nm wavelength range and calculation of absorption at the selected wavelengths. The calculation algorithm permits the visualization of absorption spectrum, provides background correction and modification of running absorbance with final temporal integration of the modified signals. This approach was verified using an Ocean Optics CCD spectrometer (1200 mm -1 groove density; 5 µm slit width; 3648 pixels (190-410 nm); 4 ms data collection time), xenon arc lamp and fast heated (10 K/ms) graphite tube atomizer. The measurements for number of elements were performed using single sampling. The data for 80 spectra were collected during pulse vaporization and processed in Excel. The results obtained for the multi-element solutions reveal an opportunity of simultaneous determination of individual analytes over a concentration range of 3-5 orders of magnitude with a limit of detection at μg/L level. The analysis for multiple elements including the sampling, measurements and calculations is performed in about 1-2 minutes. The instrument is simple and compact. The example of analysis of underground water shows that beside of the quantification of the analytes the absorption spectra obtained can be employed for the characterization of major molecular constituents of the samples.
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