Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Determination of thallium by volatile compound generation atomic absorption spectrometry
Download
index.pdf
Date
2011
Author
Ataman, Seval
Metadata
Show full item record
Item Usage Stats
252
views
97
downloads
Cite This
Determination of thallium is important due to its toxic effects on the environment and human health. Extremely low abundance of thallium in earth crust requires very sensitive and accurate methods for determination of this element. Although volatile compound generation is a sensitive, fast and economical method, thallium determination by this method has not been sufficiently investigated in literature, because of the fact that the formation of volatile forms of this element is a difficult task. A continuous flow volatile compound generation system was developed and parameters that affect the analytical signal were optimized. Sample solutions were acidified with 0.5 mol/L HNO3 and prepared in 0.0005% (v/v) rhodamine B and 1.0 mg/L Pd while 0.5% (m/v) NaBH4 stabilized in 0.5% (m/v) NaOH was used as reductant. Fast decomposition and unstability of thallium volatile species affected system performance negatively. Flow injection volatile compound generation studies were carried out with a special system. After optimizations, LOD and LOQ values were calculated as 12 ng/mL and 40 ng/mL according to peak height values in HNO3 medium. Similarly, in HCl medium LOD and LOQ values were calculated as 14 ng/mL and 45 ng/mL. Addition of Te and Pd to the sample solution containing co-enhancement reagent rhodamine B improved volatile compound generation efficiency in peak height by 3.6 and 9.3, respectively. Type of the acid used was affected peak heights and peak shapes of Tl+ and Tl3+ volatile species and HNO3 medium gave better results. By changing the location of introduction for Ar gas, the sources of memory effects and reasons of peak broadening were investigated. Most of the memory effects were coming from the gas-liquid separator (GLS) or before the GLS, as well as T-tube atomizer. Nature and behavior of Tl volatile species were also investigated and it was found that Tl and also Pd were generated in the form of nanoparticles. Transmission electron microscopic (TEM) measurements prove the presence of Tl nanoparticles in the analyte species transported to the atomizer by the effect of carrier Ar gas.
Subject Keywords
Chemistry
URI
http://etd.lib.metu.edu.tr/upload/12613728/index.pdf
https://hdl.handle.net/11511/21023
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
In-situ generation of poly(n-vinyl-2-pyrrolidone)-stabilized palladium(0) and ruthenium(0) nanoclusters as catalysts for hydrogen generation from the methanolysis of ammonia-borane
Erdoğan, Huriye; Özkar, Saim; Department of Chemistry (2010)
More attention has been paid to find new type renewable energy sources because of increasing concern about the environmental problems arising from the combustion of fossil fuels as energy sources. The development of new storage materials will facilitate the use of hydrogen as a major energy carrier. Several possibilities exist for ‘‘solid-state’’ storage: the hydrogen can be trapped in metal organic frameworks, carbon nanotubes and certain alloys; or one can use materials in which hydrogen is already presen...
Determination of silver by slotted quartz tube atom trap flame atomic absorption spectrometry using metalcoatings
Karaman, Gamze; Ataman, Osman Yavuz; Department of Chemistry (2011)
Silver is a precious metal having antibacterial property and widely used in industry mostly for water purification and medicinal products. Therefore, the determination of trace levels of silver is important for industrial applications. Flame atomic absorption spectrometry (FAAS) is a popular technique for the determination of relatively low concentration levels. This mature technique owes its widespread application to its simplicity and low cost. However, for some occasions, FAAS technique suffers from its ...
Rapid and Concomitant Analysis. of Pharmaceuticals in Treated Wastewater by Coated Blade Spray Mass Spectrometry
Poole, Justen J.; Gomez-Rios, German A.; Boyacı, Ezel; Reyes-Garces, Nathaly; Pawliszyn, Janusz (American Chemical Society (ACS), 2017-11-07)
The widespread use of pharmaceuticals in both human and animal populations, and the resultant contamination of surface waters from the outflow of water treatment facilities is an issue of growing concern. This has raised the need for analytical methods that can both perform rapid sample analysis and overcome the limitations of conventional analysis procedures, such as multistep workflows and tedious procedures. Coated blade spray (CBS) is a solid-phase microextraction based technique that enables the direct...
Impact of PCB-118 and transformer oil toxicity on anaerobic digestion of sludge: Anaerobic toxicity assay results
Kaya, Devrim; İmamoğlu, İpek; Sanin, Faika Dilek (Elsevier BV, 2013-08-01)
In this study, possible toxicity of increasing doses of PCB-118 and transformer oil (TO) on anaerobic sludge digestion was investigated. For this purpose, five different sets of reactors were prepared in which four different PCB-118 concentration (1, 10, 20, and 30 mg L-1) and three different TO concentration (0.38, 0.76, and 1.52 g L-1) were applied. Throughout the study, biogas production and composition, pH, TS, VS, and COD as well as PCB concentration were monitored. Toxicity was investigated by anaerob...
Strain-enhanced sensitivity of polymeric sensors templated from cholesteric liquid crystals
Batır, Özge; Bat, Erhan; Büküşoğlu, Emre (Royal Society of Chemistry (RSC), 2020-08-01)
Detection of volatile organic compounds (VOCs) is an important issue due to their harmful impact on human health. In this study, we aimed at enhancing the sensitivity of the anisotropic polymeric films templated from cholesteric liquid crystals (CLCs) in the identification of VOCs at concentrations on the order of 100 ppm. To increase sensitivity, we introduced negative strain to the films in the direction parallel to the helical axis and evaluated its effect on the sensitivity. Specifically, we used LC mix...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
S. Ataman, “Determination of thallium by volatile compound generation atomic absorption spectrometry,” M.S. - Master of Science, Middle East Technical University, 2011.
