Studies on the formation of atomic and molecular ions of uranium and thorium in thermal ionization mass spectrometry

Alamelu, D.; Kumar, S. Jagadish; Parab, A.R.; Choudhary, Amol

doi:10.1016/j.ijms.2010.01.019

Cited by 8 publications

(3 citation statements)

References 15 publications

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“…325 Aggarwal et al have studied the formation of atomic (M + ) and molecular ions (MO + ) of uranium and thorium in TIMS of synthetic mixtures with Th/U and have shown its use for isotope analysis of Th and U. 326,327 Aggarwal and colleagues have reported a robust methodology for high-precision isotope analysis of boron (in the form of Na 2 BO 2 + ) by TIMS; Na 2 BO 2 + can be generated by TIMS using NaCl instead of sodium carbonate or NaOH. 328 They used this method in the determination of ultra-trace boron concentrations in uranium oxide.…”

Section: Nuclear Chemistrymentioning

confidence: 99%

Mass Spectrometry in India

Vairamani

Prabhakar

2012

Eur J Mass Spectrom (Chichester)

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All rights reserved EUROPEAN JOURNAL OF MASS SPECTROMETRY This review highlights the research in mass spectrometry carried out all over India, with a focus on the last two decades. There has been a phenomenal increase in the use of mass spectrometers in India during the last decade following the introduction, at the beginning of the 21st century, of rugged electrospray ionization sources for the commercially available instruments, with applications such as pharmacokinetics and bio-equivalence drug studies, pesticide residue analysis and proteomics. There have been more papers published in these areas than could be fully covered in this article. This review covers mostly research in mass spectrometry carried out continuously in institutions where advanced facilities for mass spectrometry are functional. Researchers in India, with some notable exceptions, have always used and still use commercial mass spectrometers in their various areas of research, rather than develop their unique instruments. The review is divided into three parts: organic, elemental (or atomic) and biological mass spectrometry. Organic mass spectrometry Organic and bio-organic chemistry Research in organic mass spectrometry in the early years was mainly focused on the study of mass spectral fragmentation of different classes of new compounds,and was initiated in the 1960s by the late Das and his colleagues from the National Chemical Laboratory (NCL), Pune. The first double-focusing mass spectrometer (CEC-110 B) was installed at NCL for high-resolution mass measurements. The compounds studied by Das and his colleagues included aromatic amides, Benzophenanthridine derivatives, norses

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Section: Nuclear Chemistrymentioning

confidence: 99%

Mass Spectrometry in India

Vairamani

Prabhakar

2012

Eur J Mass Spectrom (Chichester)

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“…Concerning TIMS, many studies have focused on the enhancement of the ionization efficiency. These methods aim to reduce the oxide formation by understanding the associated mechanisms [11], improve beam focus and ion transmission by reducing the spatial extent of the sample load, or enhance the work function of the ionization filament (see for a review [12]). Instead of the measurement of lanthanide metallic ion, several authors use lanthanide single oxide ion measurements using O 2 or different oxide activators on filaments [8,9,[13][14][15] increasing therefore the ionization efficiency.…”

Section: Introductionmentioning

confidence: 99%

The use of total evaporation method using Channeltron electron multipliers by thermal ionization mass spectrometry for europium isotope ratio measurements on picogram sample amounts

Mialle

Quemet

Ponvienne

et al. 2012

International Journal of Mass Spectrometry

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“…41 Thermal ionization mass spectrometry (TIMS) is recognized as a very precise technique for the determination of the isotopic composition of different elements in the Periodic Table and it is appreciated for its capability of analyzing very small aliquots. 42,43 The presence of spectral interferences and matrix effects may influence the accuracy of the produced results, especially when biological samples are to be analysed. However, these interferences can be overcome by using suitable analytical approaches and/or appropriate instruments.…”

Section: Introductionmentioning

confidence: 99%

Determination of depleted uranium in human hair by quadrupole inductively coupled plasma mass spectrometry: method development and validation

et al. 2010

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The presence of depleted uranium (DU) in the environment and its possible transfer to humans has been a matter of concern for the potential risks to human health. Depleted uranium has been used for military purposes in the last few years of conflict due to its great availability and low cost. Uranium content has been mainly determined in biological fluids, such as urine and blood. Human hair can be considered as a good alternative indicator of exposure to DU thanks to its ability of accumulating chemical elements over a long period of time. Determining the isotopic composition of elements always requires using a sensitive and precise analytical technique. In this regard, isotope ratio quadrupole inductively coupled plasma mass spectrometry was considered as a qualified analytical technique and consequently employed in the present study in combination with a desolvating sample introduction system. The method was in-house validated at three different levels of concentration of depleted uranium (50, 500 and 1000 ng/l) according to common standards and guidelines. The limit of quantification of the method in hair was 7.21 mg/kg with a within-laboratory reproducibility, in terms of variation coefficient, of 16.8, 6.1 and 5.5% for the three levels, respectively. A novel analytical approach was applied to the specificity studies for hair contaminated by DU with different background levels of NU.

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Studies on the formation of atomic and molecular ions of uranium and thorium in thermal ionization mass spectrometry

Cited by 8 publications

References 15 publications

Mass Spectrometry in India

Mass Spectrometry in India

The use of total evaporation method using Channeltron electron multipliers by thermal ionization mass spectrometry for europium isotope ratio measurements on picogram sample amounts

Determination of depleted uranium in human hair by quadrupole inductively coupled plasma mass spectrometry: method development and validation

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