The international measurement evaluation programme IMEP-2: Cd in polyethylene

Lamberty, A.; Bièvre, Paul De; Götz, Adolf

doi:10.1007/bf00322619

Cited by 21 publications

(6 citation statements)

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“…Although deviations of the RUs by approximately a factor of two were found for the results of Na in samples of borehole water and tap water ( Table 2 ), the deviations were negligible in comparison with deviations of RU s of samples that were determined by means of single calibration lines, which could amount to an order of magnitude or more, as shown for Ni (above). Numerous investigations of the international measurement evaluation programme (IMEP) convincingly documented the same trend with lack of correspondence between the uncertainty of individual laboratories and that of their reported overall uncertainty of measurement [ 62 , 63 ] but that was explained as originating from lack of training of the laboratory staff. The same conclusion was proposed by Horwitz [ 47 ] after evaluating many independent results from the literature.…”

Section: Resultsmentioning

confidence: 97%

The principle of pooled calibrations delivers full correspondence between uncertainties of measurements of Na, Mg and Ni when determined using HR-CS FAAS

Andersen¹,

Moemedi²,

Katse³

2023

Heliyon

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Section: Resultsmentioning

confidence: 97%

The principle of pooled calibrations delivers full correspondence between uncertainties of measurements of Na, Mg and Ni when determined using HR-CS FAAS

Andersen¹,

Moemedi²,

Katse³

2023

Heliyon

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“…Over the past few years, the considerable growth of IMEP in terms of the number of participants and measurement rounds [2][3][4][5][6][7][8][9], has driven IRMM to seek help from regional co-ordinators. The role of the regional co-ordinators is to link with the participants, assist regional administration and bridge possible linguistic and cultural problems that may arise.…”

Section: Referencesmentioning

confidence: 99%

“…cular those published by the European Co-operation for Accreditation (EA) for the field of accreditation [1] and by the Organisation for Economic Co-operation and Development (OECD) for the field of Good Laboratory Practice (GLP) [2]. The workshop's agenda was designed to cover these two areas.…”

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confidence: 99%

International Measurement Evaluation Programme (IMEP) - Balkan Information Meeting

Papadakis

Voulgaropoulos

2000

Accreditation and Quality Assurance

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“…Since 1988 the International Measurement Evaluation Programme (IMEP) comparisons have concentrated mainly on amount content determinations of minor and trace elements in various matrices such as water [1,2,3], polyethylene [4,5,6,7] and blood serum [8,9,10]. The IMEP-8 comparison was the first focused on stable isotope ratio gas measurements.…”

Section: Introductionmentioning

confidence: 99%

The International Measurement Evaluation Programme, IMEP-8: carbon and oxygen isotope ratios in CO 2

Nørgaard

Valkiers

Nevel

et al. 2002

Analytical and Bioanalytical Chemistry

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In IMEP-8, two samples of high purity CO(2)(g), with different carbon and oxygen isotope ratios were distributed to 27 participants, originating from 14 countries and from various isotopic measurement domains (geochemistry, atmospheric and food chemistry), but particularly set up for food laboratories. In total 19 laboratories reported results. The outcome of this comparison exercise shows that the laboratories reported carbon and oxygen isotope results in good agreement with the reference values across the domains. The reported results for delta(13)C(VPDB) (carbon) for both materials are within 1 per thousand. However, for the reported results of delta(18)O(VPDB) (oxygen) for both materials the overall spread of the reported results is about 11 per thousand. Within this spread two distinct groups of participants can be identified, where the results within each group vary about 2 per thousand. The latter seems to be caused by calculation errors by participants of the reporting delta(18)O(VPDB) values. As requested, participants also reported the isotope amount ratio for carbon and oxygen in the CO(2) samples. For carbon, all reported results for both materials agree with the isotope ratio value, which can be traced back to the value reported by Craig. For oxygen, all results are in good agreement and deviate by a maximum of 0.5% from the reference values measured at IRMM. Work carried out indicates the carbon isotope ratio, for both samples IMEP-8A and IMEP-8B, differ from those reported by Craig by as much as 1.2%. In the case of oxygen, this deviation is far smaller. Both data sets, i.e. the one realised by Craig and the one realised at IRMM, demonstrate traceability to SI. It is clear that both values significantly disagree.

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The international measurement evaluation programme IMEP-2: Cd in polyethylene

Cited by 21 publications

References 0 publications

The principle of pooled calibrations delivers full correspondence between uncertainties of measurements of Na, Mg and Ni when determined using HR-CS FAAS

The principle of pooled calibrations delivers full correspondence between uncertainties of measurements of Na, Mg and Ni when determined using HR-CS FAAS

International Measurement Evaluation Programme (IMEP) - Balkan Information Meeting

The International Measurement Evaluation Programme, IMEP-8: carbon and oxygen isotope ratios in CO 2

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