Multielement instrumental activation analysis based on gamma–gamma coincidence spectroscopy

Vobecký, Miloslav; Jakůbek, J.; Bustamante, C.G.; Koníček, J.; Pluhař, Jan; Pospı́šil, S.; Rubáček, L.

doi:10.1016/s0003-2670(99)00005-7

Cited by 11 publications

(8 citation statements)

References 5 publications

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“…4 NIST SRM 2556 (Used Auto Catalyst) was thus chosen to validate the accuracy of the developed methodology. SRM 2556 is certified only for Pb and other PGEs, i.e., Pt (697.4 mg kg −1 ), Pd (326 mg kg −1 ), and Rh (51.2 mg kg −1 ), but Vobeckýet al 56 earlier reported an estimate of 19 μg kg −1 Ir by instrumental activation analysis when utilizing a coincidence spectrometer. As Ir may be present in SRM 2556 as a metallic impurity that is resistant to attack by all acids, including aqua regia, sample preparation excludes the use of conventional wet acid digestion techniques for solubilization.…”

Section: Figures Of Meritmentioning

confidence: 99%

“…It should be noted that this type of spectral interference does not occur with FI-PVG because the PVG efficiency for Pt at 1 μg L −1 under conditions optimal for Ir was found to be negligible (≈0.23%). Interestingly, the PVG efficiencies of the other two PGEs present at high concentrations and certified in SRM 2556 were also tested and found to be very low, reaching ≈0.07% for Pd 56 The practical feasibility of determination of dissolved Ir (as Ir 3+ and Ir 4+ ) at extremely low concentrations was also examined by a direct analysis of five water samples of different matrix complexity. No dilution of the water samples was required except for the addition of concentrated HCOOH and solutions of sensitizers (final dilution factor of only 1.19).…”

Section: Figures Of Meritmentioning

confidence: 99%

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Highly Efficient Photochemical Vapor Generation for Sensitive Determination of Iridium by Inductively Coupled Plasma Mass Spectrometry

et al. 2023

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Herein, we describe the highly efficient photochemical vapor generation (PVG) of a volatile species of Ir (presumably iridium tetracarbonyl hydride) for subsequent detection by inductively coupled plasma mass spectrometry (ICPMS). A thin-film flow-through photoreactor, operated in flow injection mode, provided high efficiency following optimization of identified key PVG parameters, notably, irradiation time, pH of the reaction medium, and the presence of metal sensitizers. For routine use and analytical application, PVG conditions comprising 4 M formic acid as the reaction medium, the presence of 10 mg L–1 Co2+ and 25 mg L–1 Cd2+ as added sensitizers, and an irradiation time of 29 s were chosen. An almost 90% overall PVG efficiency for both Ir3+ and Ir4+ oxidation states was accompanied by excellent repeatability of 1.0% (n = 15) of the peak area response from a 50 ng L–1 Ir standard. Limits of detection ranged from 3 to 6 pg L–1 (1.5–3 fg absolute), dependent on use of the ICPMS reaction/collision cell. Interferences from several transition metals and metalloids as well as inorganic acids and their anions were investigated, and outstanding tolerance toward chloride was found. Accuracy of the developed methodology was verified by analysis of NIST SRM 2556 (Used Auto Catalyst) following peroxide fusion for sample preparation. Practical application was further demonstrated by the direct analysis of spring water, river water, lake water, and two seawater samples with around 100% spike recovery and no sample preparation except the addition of formic acid and the sensitizers.

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Section: Figures Of Meritmentioning

confidence: 99%

Section: Figures Of Meritmentioning

confidence: 99%

Highly Efficient Photochemical Vapor Generation for Sensitive Determination of Iridium by Inductively Coupled Plasma Mass Spectrometry

et al. 2023

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“…Despite subsequent early work [4, 5], only occasional applications have been reported in analytical chemistry [6–9]. In contrast coincidence counting is well established in nuclear structure studies where it is routinely used by nuclear spectroscopists to elucidate complex decay schemes.…”

Section: Introductionmentioning

confidence: 99%

On neutron activation analysis with γγ coincidence spectrometry

Zeisler

Cho

Ribeiro

et al. 2017

J Radioanal Nucl Chem

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A new γγ coincidence system has been set up at NIST. It is operated with a digital data finder supported by new software developed at NIST. The system is used to explore possible enhancements in instrumental neutron activation analysis (INAA) and study applicability to neutron capture prompt gamma activation analysis (PGAA). The performance of the system is tested with certified reference materials for efficiency calibration and quantitative performance. Comparisons of INAA results based on conventional gamma-ray spectrometry data with INAA results based on coincidence data obtained from the same samples show improvements in the counting uncertainties and demonstrates the quantitative accuracy of the new system.

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“…While the technique is commonly used in nuclear structure analysis to construct radioactive decay schemes, its application in neutron activation analysis (NAA) has been limited. Previous research has explored the technique's usefulness in NAA, and experiments confirm that it has advantages to offer over singles counting [1]–[3]. Previous research also suggests reasons for its lack of popularity [4].…”

Section: Introductionmentioning

confidence: 99%

Data acquisition and analysis software for gamma coincidence spectrometry

Shetty

Sahin

2016

J Radioanal Nucl Chem

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Coincidence counting in neutron activation analysis has well-known advantages, most importantly improvement of detection limits. One obstacle to the wider use of this technique is the complexity of the data acquisition and reduction systems that it requires. The usual approaches to multi-detector data acquisition incur significant dead-time, involve redundant work in repeatedly developing limited tools and risk potential errors in low-level code. The paper describes progress made in developing a software framework to address these shortcomings.

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Multielement instrumental activation analysis based on gamma–gamma coincidence spectroscopy

Cited by 11 publications

References 5 publications

Highly Efficient Photochemical Vapor Generation for Sensitive Determination of Iridium by Inductively Coupled Plasma Mass Spectrometry

Highly Efficient Photochemical Vapor Generation for Sensitive Determination of Iridium by Inductively Coupled Plasma Mass Spectrometry

On neutron activation analysis with γγ coincidence spectrometry

Data acquisition and analysis software for gamma coincidence spectrometry

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