Publications by authors named "Petr Sperka"
Article Synopsis
- Sample surface topography strongly affects the laser ablation (LA) process and the analytical results obtained from LA-ICP-MS methods, as evidenced by experiments involving certified aluminium alloy samples.
- Different roughness levels on the sample surfaces led to varying signal responses during ICP-MS analysis, with a notable increase in signal for certain isotopes, particularly with rough surfaces compared to polished ones.
- The findings highlight the importance of carefully considering surface preparation to avoid misleading data interpretations, while also demonstrating that roughening surfaces can enhance method sensitivity and reduce matrix effects for individual analytes.
Nanoparticles (NPs) applied to the surface of some solids can increase signals in inductively coupled plasma mass spectrometry (ICPMS). Drops containing 20 and/or 40 nm nanoparticles of Ag and/or Au were deposited on metallic and ceramic/glass samples, and after being dried, both the samples treated with NPs and plain targets were ablated by one pulse per spot. The laser ablation ICPMS (LA-ICPMS) signals were enhanced for metallic samples modified with NPs in comparison to signals produced at the plain, untreated surface.
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