Radiotracer techniques for evaluation of selenium hydride generation systems

Reamer, D. C.; Veillon, Claude; Tokousbalides, P. T.

doi:10.1021/ac00225a028

Cited by 41 publications

(16 citation statements)

References 11 publications

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“…1) is of Teflon. Although it has been reported [14] that the use of these materials results in activity losses of up to 30% due to adsorption on the surfaces of the apparatus, this effect was not observed. To prevent adsorption of BiH 3 on the glass frit however, the frit was siliconized [14].…”

Section: Chemical Proceduresmentioning

confidence: 80%

Determination of ²¹⁰Pb via ²¹⁰Bi Using a Hydride Generation Technique Combined with β-Spectrometry

et al. 1996

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A procedure for the determination of 2 '°Pb is presented, which is based upon the /?-spectrometric assay (utilizing a liquid-scintillation counter) of 2,ü Bi in radioactive equilibrium. Separation of 210 Bi from the sample matrix as well as from other /^-emitters is achieved quickly, simply and selectively using a purge and trap technique based upon the generation and subsequent absorption of BiH 3 on a prepared filter paper. Advantages of this method include: 1) radioactive equilibrium between 2,0 Pb and 210 Bi is relatively quickly attained; 2) the external background signal in liquid-scintillation counting is very low; 3) no quenching corrections are necessary, as the sample matrix is invariant; and 4) because of the high counting efficiency, only short measuring times are required.

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Section: Chemical Proceduresmentioning

confidence: 80%

Determination of ²¹⁰Pb via ²¹⁰Bi Using a Hydride Generation Technique Combined with β-Spectrometry

et al. 1996

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“…Reamer et al 12 studied selenium adsorption on several hydride generation systems and construction materials by use of 75 Se as a radiotracer (100 μg L −1 ). Polypropylene, two types of Teflon, and both silaned and unsilaned glass were evaluated.…”

Section: Preservation Of Selenium-containing Samplesmentioning

confidence: 99%

Water Sample Preservation

Crompton

2015

Determination of Metals in Natural Waters, Sediments and Soils

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“…161,162 The second fact was that the addition of oxygen or air to the purge gas increased the sensitivity, 163,164 and the highest sensitivities were found for extremely fuel-rich hydrogen-oxygen flames burning inside unheated quartz tube atomizers, 165,166 with an optimum H:O ratio of 5:1; the third fact was a pronounced influence of the quartz cell surface on the analyte signal. [167][168][169]…”

Section: ·1 Atomization Via Thermal Decompositionmentioning

confidence: 99%

Mechanism of Volatile Hydride Formation and Their Atomization in Hydride Generation Atomic Absorption Spectrometry

Kumar

Riyazuddin

2005

ANAL. SCI.

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The mechanism of volatile hydride generation (HG) and the formation of analyte atoms in the quartz cell atomizer used in the determination of hydride-forming elements (As, Bi, Ge, Pb, Sb, Sn, Te etc.) by atomic absorption spectrometry (AAS), have been critically reviewed. The nascent hydrogen mechanism failed to explain hydride generation under different experimental conditions when tetrahydroborate (THB), amineboreanes (AB) and cyanotrihydroborate (CBH) were used as reductants. Various experimental evidence suggested a non-nascent hydrogen mechanism, in which the transfer of hydrogen directly bonded to boron to an analyte takes place. In electrochemical hydride generation (EcHG), the reduction of the analyte species and subsequent hydrogenation was proposed. The mechanism of analyte atom formation in a quartz tube atomizer has been explained by the following hypotheses: thermal decomposition, oxidation by 02 and collisions by hydrogen free radicals. The free-radical mechanism satisfactorily explains most of the analytical implications. The significant variation in the experimental conditions required to generate different analyte hydrides makes it difficult to arrive at a generalized mechanism of hydride formation.

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Radiotracer techniques for evaluation of selenium hydride generation systems

Cited by 41 publications

References 11 publications

Determination of ²¹⁰Pb via ²¹⁰Bi Using a Hydride Generation Technique Combined with β-Spectrometry

Determination of ²¹⁰Pb via ²¹⁰Bi Using a Hydride Generation Technique Combined with β-Spectrometry

Water Sample Preservation

Mechanism of Volatile Hydride Formation and Their Atomization in Hydride Generation Atomic Absorption Spectrometry

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Radiotracer techniques for evaluation of selenium hydride generation systems

Cited by 41 publications

References 11 publications

Determination of 210Pb via 210Bi Using a Hydride Generation Technique Combined with β-Spectrometry

Determination of 210Pb via 210Bi Using a Hydride Generation Technique Combined with β-Spectrometry

Water Sample Preservation

Mechanism of Volatile Hydride Formation and Their Atomization in Hydride Generation Atomic Absorption Spectrometry

Contact Info

Product

Resources

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Determination of ²¹⁰Pb via ²¹⁰Bi Using a Hydride Generation Technique Combined with β-Spectrometry

Determination of ²¹⁰Pb via ²¹⁰Bi Using a Hydride Generation Technique Combined with β-Spectrometry