Raseleka, Rita M.Human, Hennie G. C.2024-10-022024-10-022004-03-290267-9477 (P)1364-5544 (E)https://hdl.handle.net/20.500.14519/752An electrothermal vaporizer (ETV) coupled to a time-of-flight mass spectrometer (TOF-MS) with laser ionization (LI) was applied to the identification of molecules from sulfur and chlorine matrices in the furnace. An interface was developed to entrain furnace vapors from the matrices under study, i.e., sulfur, sulfuric acid, sulfate, chlorides of sodium, potassium, caesium, magnesium, calcium and strontium, into the TOFMS. These were then ionized on the TOF axis with 219, 240 and 266 nm laser radiations. The S1 and SO1 ions were mainly detected from sulfuric acid and magnesium sulfate in the furnace when ionized with a 219 nm beam. SO2 1 was observed with 266 nm. Mainly S1 and S2 1 were detected when sulfur was ionized with 219 and 266 nm. The spectra obtained at 219 nm were identical to those attained at 240 nm for the chloride matrices. The MCl1, M2Cl1, M1, and M2 1 (where M is the metal) were observed for Na, K and Cs. Various compositions of oxides (MxOy)1, M2OCl1 and chlorides MCl1 and MCl2 1 were identified for Ca and Sr. Mg only produced the Mg1 isotopes.enAttribution-NonCommercial-ShareAlike 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-sa/4.0/IonizationSpectrometryMassMoleculesUltravioletArticle