A1.5 - Thermal Lens Spectrometric Detection of Mn2+ In Aqueous Solutions
- Event
- 54th Winter School on Wave and Quantum Acoustics
2026-02-09 - 2026-02-12
Szczyrk (Poland) - Chapter
- Acoustoelectronic Sensors
- Author(s)
- R. Zgueb, D. Korte - University of Nova Gorica, Nova Goricia (Slovenia)
- Pages
- 14 - 15
- DOI
- 10.5162/WSWQA2026/5
- ISBN
- 978-3-910600-09-6
- Price
- free
Abstract
Manganese (Mn2+) is an essential trace element required for normal body functions, but high levels can be toxic to organs as it can damage liver and heart or introduce disorders to fetus and cause disfuntionality of reproductive system. Thus, it is of high importance to monitor its amounts in the environment. In the work the thermal lens spectrometry (TLS) was applied to detect the trace amounts of Mn2+ in water. The detection is based on the adsorption of Mn²⁺ ions onto the surface of silver nanoparticles (Ag0 NPs), which were synthesized by the reduction of Ag⁺ ions to Ag0 using BH4- as a reducing agent and a stabilizer. Manganese solutions with concentrations ranging from 0.5 μM to 10 μM were prepared. The calibration curve showed good linearity over the examined concentration range. The obtained limit of detection (LOD) and limit of quantification (LOQ) were 20 and 68 nM, respectively and confirmed high sensitivity of the method. Furthermore, the method shows both good repeatability and reproducibility, as well as high precision and accurcy with RSD not exceeding 3%. The maximum contamination level (MCL) of Mn2+ in water is 0.91 μM (0.05 mg/L), wich indicates values higher than LOD. The results indicate that the proposed TLS-based method is a simple and reliable technique for determination of metal ions in water.