Determination of Fe(II) by Optimized Thermal Lens Microscope
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Abstract
A simple and accurate method for the determination of Fe(II) species in liquid solutions was developed. The measurement principle was realized by the photothermal effect and performed by the use of a thermal lens microscope (TLM) in its optimized, mode-mismatched configuration with a counter-propagating probe beam (PB) and an excitation beam (EB). Additionally, due to the combination of the collimated PB and tightly focused EB measurement, the detection limit was significantly decreased. Our preliminary results demonstrated that a TLM enables the detection of iron ions at the levels of \(\upmu \mathrm{g}{\cdot }\hbox {L}^{-1}\), which makes this technique an alternative to traditional spectroscopic methods as a promising detector for the ultrasensitive determination of different compounds in liquid solutions.
Keywords
Fe(II) determination Photothermal techniques Thermal lens microscopeNotes
Acknowledgments
Authors would like to thank the Slovenian Research Agency for funding this work through research grants P1-0034: “Analytics and chemical characterization of materials and processes” as well as the IVIC and ICTP for the support of the work through the Research Associateship Program.
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