Assay of extremely low technetium concentrations by adsorption stripping voltammetry at the HMDE after reaction with thiocyanate

Friedrich, Margarete; Ruf, H.

doi:10.1016/0022-0728(86)90004-5

Cited by 14 publications

(3 citation statements)

References 11 publications

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“…1 • C. Ammonium perrhenate was purchased from Strem and used as a macroscopic carrier in experiments where noted. Chloroform, hydrochloric acid, nitric acid, benzoic acid, acetic acid, and sodium iodide were all used as purchased.…”

Section: Caution!mentioning

confidence: 99%

“…Samples analyzed for technetium contamination must undergo manual chemical separation to pre-concentrate the technetium. There are a wide variety of analytical methods available to detect technetium once it has been pre-concentrated [1][2][3][4][5], with times for chemical separation plus analysis often ranging from weeks to months depending on the total number of samples. Development of a sensor for rapid detection and quantitation of 99 Tc would be useful.…”

Section: Introductionmentioning

confidence: 99%

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Fluorescent phosphinimine as possible precursor to an anionic and fluorescent sensor for Tc-99

et al. 2008

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Section: Caution!mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fluorescent phosphinimine as possible precursor to an anionic and fluorescent sensor for Tc-99

et al. 2008

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“…The analytical methods currently used for 99 Tc include inductively coupled plasma mass spectrometry (ICP-MS) [5,6], spectroelectrochemical detection [7], adsorptive stripping voltammetry [8], and liquid scintillation counting (LSC) [9]. While large quantities of technetium are present in the environment, the actual concentration is extremely low, thus requiring pre-concentration by manual chemical separation prior to analysis.…”

Section: Introductionmentioning

confidence: 99%

Phosphinimines as selective extractants for Tc-99 pertechnetate

Arrigo¹,

Galenas²,

Kannan³

et al. 2008

Radiochimica Acta

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Technetium-99 / Pertechnetate / Phosphinimines / Selective extractantsSummary. The triphenylphosphiniminium cation (Ph 3 P= NH 2 + ) was evaluated for its selectivity for the pertechnetate anion ( 99 TcO 4 − ) using both solvent extraction and solid phase extraction methods. The solid phase extraction of TcO 4 − using trimethylsilyl-protected triphenylphosphinimine coated silica gel demonstrated the selectivity of the triphenylphosphiniminium cation for TcO 4 − over a variety of inorganic (NO 3 − , Cl − , H 2 PO 4 − , HSO 4 − /SO 4 2− ) and organic (fumarate) anions in aqueous solution (> 98% extracted when at pM TcO 4 − vs. 0.15 M anion). Iodide, lactate, benzoate and acetate were able to compete with pertechnetate (only 11-83% extracted) when present in large excess (0.15 M anion vs. 10 −12 M 99m TcO 4 − ), but not when the anion was present in a 10-fold excess. The triphenylphosphiniminium cation was significantly selective for TcO 4 − over ReO 4 − , a commonly used non-radioactive analog for 99 Tc, when tracer amounts of both competed with the anions iodide, lactate, benzoate and acetate.

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Determination of Polychlorinated Biphenyls by Means of Electrochemical Methods

et al. 1999

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Determination of polychlorinated biphenyls (PCBs) in a technical mixture ± DELOR 103 ± by means of several electroanalytical methods as polarography (DC), alternating polarography (AC), fast differential pulse voltammetry (FDPV) and cyclic voltammetry (CV) in nonaqueous media is described. Direct electroreductive PCB determination in aqueous media is not possible in the available potential range but it is possible by a tensammetric determination using adsorptive properties of PCB in buffered neutral water-methanol solutions.The possibilities of adsorptive electrochemical determination of PCBs and the effects of experimental conditions have been studied by adsorptive cyclic voltammetry (AdCV) and adsorptive alternating voltammetry (AdAV).

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Assay of extremely low technetium concentrations by adsorption stripping voltammetry at the HMDE after reaction with thiocyanate

Cited by 14 publications

References 11 publications

Fluorescent phosphinimine as possible precursor to an anionic and fluorescent sensor for Tc-99

Fluorescent phosphinimine as possible precursor to an anionic and fluorescent sensor for Tc-99

Phosphinimines as selective extractants for Tc-99 pertechnetate

Determination of Polychlorinated Biphenyls by Means of Electrochemical Methods

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