Thallium determination in reference materials by Isotope Dilution Mass Spectrometry (IDMS) using thermal ionization

Waidmann, E.; Hilpert, K.; Stoeppler, M.

doi:10.1007/bf00322542

Cited by 11 publications

(5 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After analysis, all samples were filtered through a 0.45 µm pore size membrane filter in order to eliminate suspended particulate matter and were stored at 6 °C. Before Tl(I) determination, 10 ml of each sample were adjusted to the working pH with small amounts of HNO 3 .…”

Section: Sample Collection and Pre-treatmentmentioning

confidence: 99%

“…Thallium can be found in nature as Tl(I) and Tl(III) ions but its monovalent state has higher stability, whereas its trivalent state forms complexes of greater stability. Thus each state of the element exhibits different bioavailability and toxicity properties [3,4]. For this reason, studies not only attempt to determine Tl total concentration, Tl species determination is also important as well [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…Thus each state of the element exhibits different bioavailability and toxicity properties [3,4]. For this reason, studies not only attempt to determine Tl total concentration, Tl species determination is also important as well [3][4][5]. Regarding the toxicity of this metal, its presence, even in small concentrations in natural waters that serve for drinking or irrigation, might be a certain signal of mixing pure water with contaminated wastewater [6].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Speciation analysis of thallium using electrothermal AAS following on-line pre-concentration in a microcolumn filled with multiwalled carbon nanotubes

et al. 2009

View full text Add to dashboard Cite

The enrichment ability of carbon nanotubes (CNTs) was investigated and a new method established for the determination of trace thallium species in environmental samples using electrothermal atomization-atomic absorption spectrometry (ETAAS). The CNTs were employed as sorbent substrate in a continuous flow system coupled to ETAAS. Parameters influencing the recoveries of thallium were optimized. Under optimal conditions, the detection limit and precision of the method were 0.009 µg L −1 and 3.9%, respectively. The method was applied to the determination of thallium in real environmental samples and the recoveries were in the range from 96 to 100%. This system was able to separate thallium (I) from the matrix, which allowed its selective determination. The total thallium content was then determined by reducing Tl(III) with hydroxylamine. All these experimental results indicated that this new procedure can be applied to the determination of trace thallium in drinking water samples.

show abstract

Section: Sample Collection and Pre-treatmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Speciation analysis of thallium using electrothermal AAS following on-line pre-concentration in a microcolumn filled with multiwalled carbon nanotubes

et al. 2009

View full text Add to dashboard Cite

show abstract

“…Finally, by combining these adverse factors with the operational detection limit, this method permitted one to analyze only samples with a minimum content of about 50 pgkg TI. This is the amount in some plants accumulating thallium in their leaves [ I , 21, whereas the content of this element in organismal tissues is much lower and usually ranges between 1-lopgkg, except for heavily polluted materials [2]. Table 3 surveys the determination of T1 in plant materials represented by pine needles and poplar leaves and in a polluted mussel tissue.…”

Section: Biological Samplesmentioning

confidence: 99%

“…Owing to the industrial processing of these resources, T1 is then emitted to the environment. Because of the high toxicity of its compounds, the environmental monitoring of TI is of particular interest, but it is often complicated by the fact that its natural concentration in most samples is very low, thus requiring the use of highly sensitive analytical methods [2].…”

Section: Introductionmentioning

confidence: 99%

Determination of thallium in environmental samples using potentiometric stripping analysis. Method development

et al. 1997

View full text Add to dashboard Cite

A method employing computerized potentiometric stripping analysis has been developed in order to determine trace levels of thallium in various environmental samples. The method is based on the preconcentration of TI onto a mercury film electrode (formed in situ) with a subsequent reoxidation of amalgamated TI. A deaeration of the solution as well as the use of EDTA have resulted in a significant improvement of the sensitivity. In a supporting electrolyte containing 0.02-0.07 M HN03 + 0.02 M CH3COONa+ 0.001 M E D T A t 6 x lops M HgC12, the analytical signal versus concentration dependence is linear from 9 x 10-M TI (preconcentration time from 5 to 30 min). A detection limit of about 5 x lo-" M TI (0.01 pgL) is achieved when using preconcentration for 30 rnin. Despite a relatively high acidity of the supporting electrolyte used (pH 1.0-2.5), EDTA is capable to suppress the interferences from Pb" ions up to a 500-fold excess in concentration and from Cd" and Cu" up to their 100-fold excess, respectively. Nitric acid has been incorporated into the supporting electrolyte as its constituent in order to determine TI directly in the samples decomposed by means of high pressure ashing. The applicability of the method is demonstrated on various samples such as tap water (spiked), rain water, river sediment or sewage sludge. The results agree well with those obtained by isotope dilution-mass spectrometry.The method has also been tested to determine T1 in digested biological samples (e.g., pine needles, poplar leaves and mussel tissues).

show abstract

Trace and Residue Analysis

Ahuja¹

2000

Kirk-Othmer Encyclopedia of Chemical Technology

View full text Add to dashboard Cite

It is generally recognized that trace analysis implies those analyses that are carried out around 0.0001% or ppm level. Ultratrace analysis, ie, beyond what is ordinarily called trace analysis, can be then defined as analysis performed below ppm or µg/g level. Residue analysis relates to the analysis of residual materials left from an operation, eg, solvents left in pharmaceutical products or pesticides left in food. Analyses performed at or below ppm level are described. Sampling, sample preparation, sample cleanup, and method validation are discussed. In addition, a number of methodologies are covered, such as atomic absorption/emission spectrometry, neutron activation analysis, tlc, gc, hplc, hyphenated methods such as gc/ms and lc/ms, capillary electrophoresis, supercritical fluid chromatography, and immunoassays that allow analyses of both organic and inorganic samples. Applications include areas such as environment, explosives, food, pharmaceuticals, biotechnology, and a number of miscellaneous fields.

show abstract

Thallium determination in reference materials by Isotope Dilution Mass Spectrometry (IDMS) using thermal ionization

Cited by 11 publications

References 7 publications

Speciation analysis of thallium using electrothermal AAS following on-line pre-concentration in a microcolumn filled with multiwalled carbon nanotubes

Speciation analysis of thallium using electrothermal AAS following on-line pre-concentration in a microcolumn filled with multiwalled carbon nanotubes

Determination of thallium in environmental samples using potentiometric stripping analysis. Method development

Trace and Residue Analysis

Contact Info

Product

Resources

About