31. Spremljanje kakovosti vode reke Reke (maj - avgust 2015)Asta Gregorič, Petra Makorič, Marta Stopar, Mladen Franko, 2015, treatise, preliminary study, study Keywords: Reka, kakovost vode, ionska kromatografija, TOC, vzorčenje Published in RUNG: 02.03.2022; Views: 3026; Downloads: 0 This document has many files! More... |
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33. Critical reviews in analytical chemistry1980 Keywords: analitska kemija, kemijska analiza, instrumentacija, matematične metode, ravnotežje, fizika, kemijska tehnologija, materiali, ekološke znanosti, aplikacije, raziskave Published in RUNG: 28.02.2022; Views: 2996; Downloads: 0 This document has many files! More... |
34. Natural sporopollenin microcapsules composites from cellulose and chitosan : synthesis and characterizationPatricia Cazón, Hanna Budasheva, Dorota Korte, Mark Mitmoen, Chieu D. Tran, Mladen Franko, 2021, published scientific conference contribution abstract Keywords: CS:CL biocomposites, beam deflection spectrometry, natural sporopollenin, porosity Published in RUNG: 31.01.2022; Views: 3062; Downloads: 17
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36. Application of beam deflection spectrometry for the determination of iron species in passive samplers exposed to Southern Ocean ice : poster at International School of Quantum Electronics, 64th Course: Progress in Photoacoustic & Photothermal Phenomena, Erice - Sicily, October 16th-23rd, 2021Hanna Budasheva, Arne Bratkič, Martin Šala, Dorota Korte, Mladen Franko, 2021, unpublished conference contribution Published in RUNG: 02.12.2021; Views: 2733; Downloads: 58
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37. Towards a novel method for iron species determination in Antarctic sea iceHanna Budasheva, Arne Bratkič, Dorota Korte, Mladen Franko, 2021, published scientific conference contribution abstract Abstract: Sea-ice borne iron has been found to be an important factor controlling Southern Ocean phytoplankton growth [1]. Knowing the amount and chemical speciation of its labile fraction in sea ice would advance our understanding of the involved processes. Unfortunately, it is rather difficult to perform their measurement because of limited access to the Antarctic. Thus there is a strong need for the development of a quick, simple and reliable technique for determination of iron and its speciation in sea-ice that ensures also low enough limits of detection. Recently, diffusive gradients in thin films (DGT) have been widely used as passive samplers for collecting time-averaged data on the concentrations of transition metals in different media [2]. DGTs are further coupled to an analytical technique that in case of detecting metals in passive sampler films primarily requires their extraction [3], which may potentially lead to changes of the metal specification. In the present study, the beam deflection spectrometry (BDS) is coupled to DGT and used to determine the average concentration of iron in the sea ice samples collected at the Davis Station in the Antarctic. Such a combined technique has been already successfully applied for detecting labile iron species in freshwater sediments [4]. The obtained BDS data were validated by thermal lens spectrometry (TLS) and UV-Vis spectrophotometry (SPEC). The distribution of iron species over a given ice surface area using the DGT-BDS technique revealed total iron concentrations in the range of 0.6 – 5.3 μgL-1, whereas the Fe2+ content was found to be in the range of 0.1 – 1.5 μgL-1. The range taking into account all of the measurement points (5×4), the precision of a single measured point is 0.2 μgL-1. The calculated 24 h-average concentration of total Fe labile species in the ice by using BDS is 2.3 ± 0.5 μgL-1, which coincides with data obtained by SPEC (2.5 ± 0.4 μgL-1) and TLS (2.39 ± 0.02 μgL-1). Our results indicate that it is possible to develop a robust, contamination-resilient detection method for measuring the labile iron species concentration in the sea ice. In opposite to TLS and SPEC, BDS-DGT provides reliable information not only about the speciation of iron but also about their distribution on the ice surface. Keywords: beam deflection spectrometry, diffusive gradients, thin films, iron species, photothermal techniques, Antarctic sea ice Published in RUNG: 30.11.2021; Views: 3831; Downloads: 0 This document has many files! More... |
38. Characterization of Cu and Zr modified TiO[sub]2 photocatalysts by photothermal beam deflection spectrometryMahmoud Abdelhamid, Dorota Korte, Humberto Cabrera, Zeinab Ebrahimpour, Olena Pliekhova, Urška Lavrenčič Štangar, Mladen Franko, 2021, published scientific conference contribution abstract Keywords: photocatalysts, TiO2, Cu/Zr, photodegradation, material characterization, photothermal spectrometry Published in RUNG: 23.11.2021; Views: 3533; Downloads: 0 This document has many files! More... |
39. Thermo-optical characterization of Cu- and Zr-modified TiO[sub]2 photocatalysts by beam deflection spectrometryMahmoud Abdelhamid, Dorota Korte, Humberto Cabrera, Olena Pliekhova, Zeinab Ebrahimpour, Urška Lavrenčič Štangar, Mladen Franko, 2021, original scientific article Keywords: photocatalysts, TiO2, Cu/Zr, photodegradation, material characterization, photothermal spectrometry Published in RUNG: 23.11.2021; Views: 2746; Downloads: 100
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40. Nanobody-dependent detection of microcystis aeruginosa by ELISA and thermal lens spectrometryGbenga Folorunsho Oginni, Sandra Oloketuyi, Elisa Mazzega, Hanna Budasheva, Alfred Beran, Marina Cabrini, Dorota Korte, Mladen Franko, Ario De Marco, 2021, original scientific article Keywords: cyanobacteria, nanobodies, fluobodies, phage display, thermal lens spectrometry Published in RUNG: 19.04.2021; Views: 3348; Downloads: 0 This document has many files! More... |