IN SITU LASER ELEMENTAL AND ISOTOPIC ANALYSIS OF INDUSTRIALLY-POLLUTED WITH HEAVY METALS WATER SAMPLES | IN SITU ЛАЗЕРЕН ЕЛЕМЕНТЕН И ИЗОТОПЕН АНАЛИЗ НА ИНДУСТРИАЛНО-ЗАМЪРСЕНИ С ТЕЖКИ МЕТАЛИ ВОДНИ ПРОБИ
2012
Simeonova, B., Institute of Electronics, BAS, Sofia (Bulgaria) | Simeonov, L., Institute for Space Research and Technology, BAS, Sofia (Bulgaria)
A description of a simple method for preparation of laser targets from water solutions with different concentrations of the metals Na, Mg, Fe, Ni, Cd and Hg is presented. In a descending row from 1000 to 62.5 ppb and in quantities of a 0.25 ml each, the solutions were carefully evaporated on glass holders and the produced sedimentation residues were investigated with a miniature and portable time-of-flight laser mass analyzer. Discussed are the analytical possibilities of the laser time-of-flight mass-spectrometry to produce express and stable elemental and isotopic mass spectra of environmental aqueous samples directly near the places of sample collection and several related problems as sample preparation, multielement chemical analysis and reliability of the analytical results.
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