Isotope dilution mass spectrometry

Heumann, Klaus G.

doi:10.1016/b978-0-444-88871-6.50030-1

Cited by 14 publications

(19 citation statements)

References 48 publications

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“…It is well known that IDTIMS techniques have the potential to produce the narrowest uncertainty ranges of any attainable, often on the order of 0.1% to 0.2% relative (Heumann 1988, Fassett and Paulsen 1989, Kane 1995, regardless of the absolute concentration of the analyte. Uncertainties reported as 95% confidence intervals for several of the NIST glass certifications reflect this performance for several of the elements certified (Reed 1992a-d, Kane 1998.…”

Section: Fitness For Purposementioning

confidence: 99%

An Assessment of the Suitability of NIST Glass SRM Literature Data for the Derivation of Reference Values

Kane¹

1998

Geostandards Newsletter

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The NIST certified reference materials, SRMs 610‐617, Trace Elements in Glass, are used extensively in geo‐analysis as microanalytical reference materials; however, present practice is not in keeping with ISO guidelines. One reason is that these samples were originally certified as bulk reference materials, and homogeneity conclusions based on test portion masses of about 0.5 g may differ significantly from those based on the much smaller mass relevant to microprobe analysis. Another is that certified values are not available for all elements of interest in micro‐analytical applications. In this manuscript, published homogeneity data is reviewed to show that these samples are suitable for use as microanalytical reference materials. In addition, an evaluation is undertaken of data quality requirements for micro‐analytical applications which shows that data contributing to existing compilations are insufficiently repeatable to detect bias between the individual contributed data and the compilation mean. Furthermore, existing published compilations do no yield reference data that is entirely “fit for purpose”, based on published criteria. To resolve these difficulties, it is proposed that a detailed measurement programme should be organised by the IAG with the intention of generating new data that would permit updating the certifications, and so greatly enhance current use of these glasses, and improve overall quality assurance in micro‐analytical laboratories based on appropriate microanalytical fitness for purpose criteria.

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Section: Fitness For Purposementioning

confidence: 99%

An Assessment of the Suitability of NIST Glass SRM Literature Data for the Derivation of Reference Values

Kane¹

1998

Geostandards Newsletter

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“…IDMS in general has been discussed in various reviews or review type articles in the past [21][22][23]. In 1984 Moore et al reviewed the characterisation of RM by IDMS at NIST [24].…”

Section: Introductionmentioning

confidence: 99%

Isotope dilution mass spectrometry — A primary method of measurement and its role for RM certification

Vogl

Pritzkow

2010

MAPAN

116

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This article describes the application of isotope dilution mass spectrometry (IDMS) to the field of reference material (RM) characterisation focusing on the approach, which is applied by the IDMS group at BAM. Emphasis is placed on IDMS measurements of highest analytical quality. Basic principles as well as the equation system are being recalled. Different calibration strategies, such as single, double or triple IDMS, are critically reviewed and the achievable uncertainties are discussed. Differences in the application of thermal ionization mass spectrometry (TIMS) and inductively coupled plasma mass spectrometry (ICPMS) are discussed as well as differences between different types of mass spectrometers such as single collector versus multi-collector or quadrupole versus magnetic sector instruments. Possible sources of errors and bias are mentioned and correction models introduced and applied within the past years are discussed. Several examples for RM characterisations in the field of elemental analysis are shown, each demonstrating excellent analytical quality. In general it can be stated that IDMS is the most important reference method for elemental analysis, offering highest accuracy and precision or smallest measurement uncertainties, when properly applied. Thus IDMS represents by far the best suited reference method for RM characterisation. Due to its universal applicability IDMS offers sufficient potential to follow future needs in analytical chemistry as well as in the RM sector.

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“…The samples were cooled down for 2 h and the samples were then diluted with 25 ml of MQ water. The total mercury concentration was determined by measuring the 198 Hg/ 200 Hg isotope ratios by the isotope dilution technique (ID) described by Heumann (1988).…”

Section: Methodsmentioning

confidence: 99%

Production of methyl mercury in the gut of the Australian termite Mastotermes darwiniensis

Limper

Knopf

König

2008

J Applied Entomology

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Animals are often exposed to or can ingest heavy metals along with their food. Therefore, we tested whether the hindgut microbiota of Mastotermes darwiniensis possesses the capability to form methyl mercury. The termite M. darwiniensis (Isoptera) was fed with saw dust containing different concentrations of inorganic mercury. Methyl mercury was determined by purge‐and‐trap capillary gas chromatography‐atom fluorescence spectrometry (CGC‐AFS) using ethyl mercury chloride as the internal standard. Total mercury concentrations were determined in the termite tissue by inductive coupled plasma‐isotope dilution mass spectrometry (ICP‐IDMS) after microwave‐assisted digestion. The obtained results showed in vivo methyl mercury production in terrestrial insects for the first time. Desulfovibrio intestinalis isolated from M. darwiniensis was identified as a biomethylating species of the intestinal microbiota.

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Isotope dilution mass spectrometry

Cited by 14 publications

References 48 publications

An Assessment of the Suitability of NIST Glass SRM Literature Data for the Derivation of Reference Values

An Assessment of the Suitability of NIST Glass SRM Literature Data for the Derivation of Reference Values

Isotope dilution mass spectrometry — A primary method of measurement and its role for RM certification

Production of methyl mercury in the gut of the Australian termite Mastotermes darwiniensis

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