Determination of tellurium at ultra-trace levels in drinking water by on-line solid phase extraction coupled to graphite furnace atomic absorption spectrometer

Speciation and determination of ultra trace amounts of inorganic tellurium in environmental water samples by dispersive liquid–liquid microextraction and electrothermal atomic absorption spectrometry

“…Tellurium can accumulate in the body tissues and affect on growth of plants and animals. In addition, after microbial action, it can be transformed into volatile organometalloid compounds with consequent modification of its transport pattern and toxicological behavior [3,4].…”

“…Several instrumental techniques have been applied for the determination of inorganic tellurium speciation. These include inductively coupled plasma-mass spectrometry (ICP-MS) [6,7], inductively coupled plasma atomic emission spectrometry (ICP-AES) [8], electrothermal atomic absorption spectrometry (ETAAS) [3,[9][10][11][12], hydride generation atomic absorption spectrometry (HG-AAS) [13,14], hydride generation atomic fluorescence spectrometry (HG-AFS) [15][16][17][18], gas chromatography-mass spectrometry (GC-MS) [19], cathodic stripping voltammetry [20], capillary electrophoresis with UV detection (CE-UV) [21], capillary electrophoresis coupled with ICP-MS detection (CE-ICP-MS) [22] and anion exchange HPLC-ICP-MS [23,24]. Low concentration and matrix interference are two problems in detecting tellurium compounds.…”

“…The detection limit was 12 g L −1 . Other reported methods for the separation and preconcentration of tellurium include on-line SPE [3], magnetic solid-phase extraction [7], ion exchange [10], using mercapto modified silica microcolumn [14], using cotton impregnated with thioglycollic acid (thiol cotton) [27] and coprecipitation [12,28,29]. These suggested methods are complicated and involve sequential steps and have disadvantages such as time-consumption, unsatisfactory enrichment factor, large organic solvents and secondary waste, which limit their application, thus they are not practical for routine analysis.…”

Baseline trace metals in gastropod mollusks from the Beagle Channel, Tierra del Fuego (Patagonia, Argentina)

“…Elution was performed with 500 lL of HNO3 5% m/v in order to obtain quantitative recovery of the metals. Subsampling of the eluate was needed as no more than 100 lL are supported by the atomizer employed here (Pedro et al 2008).…”

Evaluation of a new multi-walled carbon nanotube paste electrode modified with Alizarin Red S for the determination of tellurium by differential pulse stripping voltammetry

“…Furthermore, the toxicity of tellurium depends on its oxidation state and species, tellurite is 10 times more toxic than tellurate, and inorganic tellurium species are more toxic than organic tellurium species [3]. As the concentration of total tellurium in natural waters is far below the ppb level, very sensitive methods or preconcentration procedures are necessary for its determination [4]. Owing to its acute and chronic toxicity, the determination of trace amounts of tellurium has received increasing attention in recent years [5,6].…”