Selective determination of arsenic (III, V), antimony (III, V), selenium (IV, VI) and tellurium (IV, VI) by extraction and graphite furnace atomic absorption spectrometry

Chung, Chan-Huan; Iwamoto, Erika; Yamamoto, Manabu; Yamamoto, Yuroku

doi:10.1016/0584-8547(84)80051-8

Cited by 58 publications

(24 citation statements)

References 18 publications

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“…The Te(VI) concentration is obtained by the difference between the total tellurium and Te(IV) contents. Ammonium pyrrolidine dithiocarbamate (APDC) [10,11], sodium diethyldithiocarbamate, and dithiozone [11] are the ligands usually employed in the liquid -liquid extraction for the selective separation of inorganic tellurium species prior to AAS detection. SPE can also be used for inorganic tellurium separation.…”

Section: Introductionmentioning

confidence: 99%

Speciation of inorganic tellurium from seawater by ICP‐MS following magnetic SPE separation and preconcentration

Huang

Hu²

2008

J of Separation Science

103

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A new method was developed for the speciation of inorganic tellurium species in seawater by inductively coupled plasma-MS (ICP-MS) following selective magnetic SPE (MSPE) separation. Within the pH range of 2 -9, tellurite (Te(IV)) could be quantitatively adsorbed on c-mercaptopropyltrimethoxysilane (c-MPTMS) modified silicacoated magnetic nanoparticles (MNPs), while the tellurate (Te(VI)) was not retained and remained in solution. Without filtration or centrifugation, these telluriteloaded MNPs could be separated easily from the aqueous solution by simply applying external magnetic field. The Te(IV) adsorbed on the MNPs could be recovered quantitatively using a solution containing 2 mol/L HCl and 0.03 mol/L K 2 Cr 2 O 7 . Te(VI) was reduced to Te(IV) by L-cysteine prior to the determination of total tellurium, and its assay was based on subtracting Te(IV) from total tellurium. The parameters affecting the separation were investigated systematically and the optimal separation conditions were established. Under the optimal conditions, the LOD obtained for Te(IV) was 0.079 ng/L, while the precision was 7.0% (C = 10 ng/L, n = 7). The proposed method was successfully applied to the speciation of inorganic tellurium in seawater.

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Section: Introductionmentioning

confidence: 99%

Speciation of inorganic tellurium from seawater by ICP‐MS following magnetic SPE separation and preconcentration

Huang

Hu²

2008

J of Separation Science

103

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“…The hydrolytic stability of APDC in aqueous media was pH-dependent [9,21]. The half-life values for APDC decreased sharply with increasing acidity.…”

Section: Effect Of Acidity On the Retention Of Tellurium Speciesmentioning

confidence: 99%

“…Meanwhile, addition of APDC also caused greater variation of the Te(IV) signal. Such an influence of APDC on the Te(IV) signal could be due to the formation of water insoluble Te(IV)-APDC complex under the conditions applied [9].…”

Section: Optimisation Of Icp-ms Parametersmentioning

confidence: 99%

“…The change of acidity would also result in a change of Te(IV) and Te(VI) species distribution [22] and therefore the complexation efficiency of APDC with Te(IV) and Te(VI). For liquid-liquid extraction of Te(IV) and Te(VI) using APDC, Chung et al [9] found that Te(IV) was quantitatively extracted into chloroform-carbon tetrachloride mixed solvent over a wide acidity range of 5 mol L -1 HCl to pH 7, and Te(VI) was only slightly extracted from strongly acidic solutions (4 mol L -1 HCl). Kamada et al [10] reported that Te(IV) is completely extracted into carbon tetrachloride or 4-methyl-2-pentanone with APDC at pH 1-10 while the degree of extraction of Te(VI) in this pH range is much lower.…”

Section: Effect Of Acidity On the Retention Of Tellurium Speciesmentioning

confidence: 99%

“…However, essential sample pretreatment and preconcentration steps are needed to obtain the required detection limit, and additional problems would also be encountered in connection with the necessity of calibration based on organic standards and poor reproducibility for the determination of tellurium performed in organic solvents by GFAAS or HG-AAS following liquid-liquid extraction or liquid-solid extraction. Ammonium pyrrolidine dithiocarbamate (APDC) [9,10], sodium diethyldithiocarbamate and dithiozone [10] are the ligands usually employed in the liquid-liquid extraction for the selective separation of Te(IV) and Te(VI) prior to AAS detection. As an alternative to liquid-liquid extraction, solid-phase extraction (SPE, or liquid-solid extraction) can also be used for tellurium separation.…”

Section: Introductionmentioning

confidence: 99%

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Speciation analysis of tellurium by solid-phase extraction in the presence of ammonium pyrrolidine dithiocarbamate and inductively coupled plasma mass spectrometry

Yu¹,

Cai²,

Guo³

et al. 2003

Anal Bioanal Chem

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Under acidic conditions tellurium(IV) formed a complex with ammonium pyrrolidine dithiocarbamate (APDC). The tellurium(IV) complex was completely retained on a non-polar Isolute silica-based octadecyl (C(18)) sorbent-containing solid-phase extraction (SPE) cartridge, while the uncomplexed Te(VI) passed through the cartridge and remained as a free species in the solution. Only partial Te(IV) was retained on the SPE cartridge for samples without addition of APDC. On the basis of different retention behaviours of the complexed Te(IV) and uncomplexed Te(VI), a simple and highly sensitive method is proposed for the determination of total tellurium and Te(VI) by SPE separation and inductively coupled plasma mass spectrometry (ICP-MS) detection. The Te(IV) concentration was calculated as the difference between total tellurium and Te(VI) concentrations. The detection limit (3 sigma) is 3 ng L(-1) tellurium. Factors affecting the separation and detection of tellurium species were investigated. Coexisting ions did not show significant interferences with the Te(IV)-APDC complex retention and the subsequent ICP-MS detection of Te. The method has been successfully applied to the tellurium speciation analysis in waters with spiked recoveries for Te(IV) and Te(VI) of 86.0-108% and 87.1-97.4%, respectively.

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Bibliography

1998

Atomic Absorption Spectrometry

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Selective determination of arsenic (III, V), antimony (III, V), selenium (IV, VI) and tellurium (IV, VI) by extraction and graphite furnace atomic absorption spectrometry

Cited by 58 publications

References 18 publications

Speciation of inorganic tellurium from seawater by ICP‐MS following magnetic SPE separation and preconcentration

Speciation of inorganic tellurium from seawater by ICP‐MS following magnetic SPE separation and preconcentration

Speciation analysis of tellurium by solid-phase extraction in the presence of ammonium pyrrolidine dithiocarbamate and inductively coupled plasma mass spectrometry

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