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Matrix Modification for Overcoming the Spectral Effects During oTOF-ICP-MS Analysis of Sulfuric Acid
Autoři: Šídová Tereza | Husáková Lenka | Urbanová Iva | Šrámková Jitka
Rok: 2014
Druh publikace: ostatní - článek ve sborníku
Název zdroje: YISAC 2014 Book of Abstracts
Název nakladatele: Univerzita Pardubice
Místo vydání: Pardubice
Strana od-do: 40
Tituly:
Jazyk Název Abstrakt Klíčová slova
eng Matrix Modification for Overcoming the Spectral Effects During oTOF-ICP-MS Analysis of Sulfuric Acid Direct multi-element analysis of sulfuric acid by inductively coupled plasma mass spectrometry (ICP-MS) using a low resolving power instrumentation is strongly complicated especially due to the spectral effects from different polyatomics. For the quadrupol based mass spectrometers being the most widely used in analytical practice a collision/reaction cell technology enables overcoming these problems. To this date, however no method is available enabling analysis of diluted sulfuric acid with inductively coupled plasma orthogonal acceleration time-of-flight mass spectrometry (ICP-oa-TOF-MS). For this purpose, the simple technique employing barium salt for precipitation of sulfates as BaSO4 prior to analysis by ICP-oa-TOF-MS was introduced in this work. Matrix modification1 resulting in the separation of sulfates enables elimination of spectral interferences originating from different sulfur containing species like 32S16O+, 32S16O1H+, 32S2+, 32S16O21H+, 34S16O3+ on the determination of 48Ti+, 49Ti+, 64Zn+, 65Cu+ and 82Se+. After that, direct and simultaneous determination of 16 elements (Be, Ti, V, Cr, Mn, Ni, Co, Cu, Zn, Ga, Ge, As, Sb, Te, W, Re) can be performed in 10% (w/w) H2SO4 with Rh as an internal standard and using external calibration with matrix matched standard. Accuracy and precision was confirmed by the analytical recovery study and by the comparison of the results with those obtained by high resolution ICP-MS method. oTOF-ICP-MS; Matrix modification; Spectral effects; Analysis of sulfuric acid

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