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Jabeen, Nuzhat; Rehman, Ejaz Ur; Ahmed, Shafaat

doi:10.1023/a:1026218728334

Cited by 7 publications

(3 citation statements)

References 9 publications

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“…Fractionation will be reduced significantly if molecular ions like Li 2 BO 1 are used, because the relative mass difference for 6 Li 2 BO 1 versus 7 Li 2 BO 1 is almost one order of magnitude smaller compared to the atomic ions 6 Li 1 versus 7 Li 1 . [17][18][19]57 In contrast, the magnitude of mass fractionation in isotope ratio analysis of the heaviest elements, such as 235 U/ 238 U or 240 Pu/ 239 Pu, is of the order of half a per cent or less per one mass unit difference. 58,59 The mass fractionation needs to be corrected in order to reduce the introduced bias (see Chapter 6 and Section 14.3.2).…”

Section: Mass Fractionation and Temperature Profilementioning

confidence: 99%

Thermal Ionisation Mass Spectrometry

Bürger

Vogl

Klötzli

et al. 2014

Sector Field Mass Spectrometry for Elemental and Isotopic Analysis

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The principle of TIMS is based on the formation of atom ions on a heated filament and the separation of these ions according to their mass/charge ratio in a mass spectrometer. In general, TIMS is applied for highprecision measurements of isotope ratios. In the basic design of a modern thermal ionisation source, a surface material is used in the shape of a flat ribbon filament. Usually, a solution (separated from the matrix and containing the element of interest in high concentration) is deposited in the centre of the filament as a liquid. Applying a current to the filament will evaporate and ionise the analyte deposited on the filament. In the case of a single-filament geometry, evaporation and ionisation of the analyte is accomplished with one filament, whereas in a double filament design, evaporation and ionisation is performed on two filaments placed parallel to each other. The analyte is evaporated on one filament, with ionisation occurring when the evaporated atoms strike the ionisation filament. A magnetic sector field is used as mass separator.

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Section: Mass Fractionation and Temperature Profilementioning

confidence: 99%

Thermal Ionisation Mass Spectrometry

Bürger

Vogl

Klötzli

et al. 2014

Sector Field Mass Spectrometry for Elemental and Isotopic Analysis

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show abstract

“…A procedure for the determination of Li isotopic composition in sea-water involved reduction of the Na content by passing the sample through a column of hydrated Sb 2 O 5 which is an ion exchanger specific for removal of Na. 267 No further separation was carried out as any ion exchange procedure would induce isotopic fractionation. The samples (40 ng Li as LiOH) were loaded directly onto single rhenium filaments using a silica gel procedure.…”

Section: Sample Preparationmentioning

confidence: 99%

Atomic spectrometry update. Atomic mass spectrometry

Bacon¹,

Greenwood²,

Vaeck

et al. 2004

J. Anal. At. Spectrom.

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“…11 Kim et al investigated the complex formation of azacrown indoaniline with Li(I) ions on a UV-Vis spectrophotometer. 12 Other available techniques include thermal ionization mass spectrometry (TIMS), 13 inductively coupled plasma atomic emission spectrometry (ICP-AES), 14 differential pulse anodic stripping voltammetry (DPASV), 15 capillary electrophoresis (CE), 16 ow injection analysis (FIA) 17 and ion chromatography (IC). 18 Fluorescent sensing is known to proffer distinct advantages over most other instruments.…”

Section: Introductionmentioning

confidence: 99%