Direct Determination of Dissolved and Total Thallium in Lake Waters by Laser-Excited Atomic Fluorescence Spectrometry

Cheam, V.; Lechner, J.; Desrosiers, R.; Sekerka, Ivan

doi:10.1080/03067319608026261

Cited by 18 publications

(11 citation statements)

References 23 publications

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“…The use of LEAFS for determination of thallium in water originating from port Hamilton (Ontario, Canada) allowed to achieve a detection limit of 0.1 ng L −1 (Cheam et al 1996), whereas samples of spring water collected by Miyazaki et al contained approx. 1.3 ng mL −1 of thallium, as determined by the use of ICP-AES.…”

Section: Distribution Of Thallium In the Environmentmentioning

confidence: 99%

Presence of thallium in the environment: sources of contaminations, distribution and monitoring methods

Karbowska

2016

Environ Monit Assess

258

108

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Thallium is released into the biosphere from both natural and anthropogenic sources. It is generally present in the environment at low levels; however, human activity has greatly increased its content. Atmospheric emission and deposition from industrial sources have resulted in increased concentrations of thallium in the vicinity of mineral smelters and coal-burning facilities. Increased levels of thallium are found in vegetables, fruit and farm animals. Thallium is toxic even at very low concentrations and tends to accumulate in the environment once it enters the food chain. Thallium and thallium-based compounds exhibit higher water solubility compared to other heavy metals. They are therefore also more mobile (e.g. in soil), generally more bioavailable and tend to bioaccumulate in living organisms. The main aim of this review was to summarize the recent data regarding the actual level of thallium content in environmental niches and to elucidate the most significant sources of thallium in the environment. The review also includes an overview of analytical methods, which are commonly applied for determination of thallium in fly ash originating from industrial combustion of coal, in surface and underground waters, in soils and sediments (including soil derived from different parent materials), in plant and animal tissues as well as in human organisms.

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Section: Distribution Of Thallium In the Environmentmentioning

confidence: 99%

Presence of thallium in the environment: sources of contaminations, distribution and monitoring methods

Karbowska

2016

Environ Monit Assess

258

108

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“…After the rapid advance in sensitive instruments such as the ICPMS, there have been more Tl data reported in environmental studies, indicating an increased interest in this element. In our laboratory, we have developed a highly sensitive instrument, the Laser-Excited Atomic Fluorescence Spectrometry, LEAFS (Cheam et al 1992(Cheam et al , 1996a, and applied it to the study of several important Canadian environmental issues dealing with major ecosystems such as the Canadian Arctic and the Great Lakes, as well as to study the pollution from the operations of coal mines and coal power plants across the country, interstitial pore water, and various lakes and rivers across the country (Cheam et al 1993(Cheam et al , 1995(Cheam et al , 1996b(Cheam et al , 1998(Cheam et al , 2000.…”

Section: Introductionmentioning

confidence: 99%

Thallium Contamination of Water in Canada

Cheam¹

2001

Water Quality Research Journal

110

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Thallium is highly toxic but has been an obscure element compared to its three popular neighbours, lead, mercury and cadmium. It is partly due to the scarcity of its analytical data, caused by its high analytical detection limit relative to the other three elements and by its generally low level in the environment. We have developed a highly sensitive instrument, a Laser-Excited Atomic Fluorescence Spectrometer, to study thallium contamination in some important Canadian ecosystems from the Arctic (containing very low thallium concentration) to coal-related industries across Canada and even to the study of thallium toxicity in an invertebrate, Hyalella azteca. Overall, our data indicate that the coal power plants and mines contain higher thallium concentrations than the other ecosystems studied, and the eastern region has the highest Tl concentrations compared to other regions. The range of thallium concentration in ng/L for the Arctic snow and ice was between not detected and 8.4, for the Great Lakes waters 0.9 to 48, for pore waters 0.1 to 213, for western coal power plants and mines 0.1 to 1326, for central coal power plants 1.2 to 175, for eastern coal power plants and mines 0.2 to 23605, and for miscellaneous sites across Canada not detected to 4390 ng/L. Some of these high concentrations and those high ones reported in industrial wastewaters exceeded the chronic toxicity endpoints for Hyalella azteca mortality, growth and reproduction, thus can cause serious distress to the environment. All data were integrated into a map of thallium distribution, the first one in Canada. Natural background level of thallium for the Arctic was estimated to be 0.02 to 0.03 pg/g.

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“…Sea waters usually contain 10-15 ng L -1 of thallium. [12][13][14][15][16][17][18] There is a lack of data regarding other attempts to determine the content of thallium in homeopathic drugs, therefore it was not possible to compare the obtained results with other reports.…”

Section: Resultsmentioning

confidence: 56%

Determination of Tl(I) Ions in Homeopathic Drugs by Differential Pulse Anodic Stripping Voltammetry

Zembrzuski¹,

Karbowska²

2017

IJPER

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Objectives: The present study is focused on the determination of thallium (I) ions in homeopathic drugs. Methods: The determination was carried out using the Differential Pulse Anodic Stripping Voltammetry (DPASV) technique coupled with the flow-injection measuring system (FIA-DPASV). Results: The thallium content was analyzed in two commercial homeopathic preparations (Thallium aceticum 5CH and 9CH), which include two different concentrations of thallium. It was established, that the mean concentration of thallium in the 5CH drug was at 6.67 ng L -1 in the administered daily dose, whereas in case of 9CH the value was at 2.1 ng L -1 of thallium. Conclusion: The obtained results indicate that the application of the studied homeopathic drugs for medical purposes is not associated with any hazards in terms of possible toxicity due to thallium content.

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Direct Determination of Dissolved and Total Thallium in Lake Waters by Laser-Excited Atomic Fluorescence Spectrometry

Cited by 18 publications

References 23 publications

Presence of thallium in the environment: sources of contaminations, distribution and monitoring methods

Presence of thallium in the environment: sources of contaminations, distribution and monitoring methods

Thallium Contamination of Water in Canada

Determination of Tl(I) Ions in Homeopathic Drugs by Differential Pulse Anodic Stripping Voltammetry

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