2020
DOI: 10.1088/0026-1394/57/1a/08001
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CCQM-K137, nitrogen monoxide (NO) in nitrogen

Abstract: The key comparison CCQM-K137 was aimed at evaluating the level of compatibility of laboratories' preparative capabilities for gravimetric nitrogen monoxide/nitrogen primary reference mixtures at mole fractions of 30 μmol mol-1 and 70 μmol mol-1. The comparison was organised by the BIPM. It consisted in the simultaneous comparison of a suite of 2n primary gas standards, two standards to be prepared by each of the n participating laboratories at the nominal values of 30 μmol mol-1 and 70 μmol mol-… Show more

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Cited by 5 publications
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“…Figure 1 does not show the results from comparisons at 380 and 480 µmol mol −1 from CCQM-K120 as they fall outside track A. The open circles show the results from five track C comparisons (CCQM-K137a and b: 30 and 70 µmol mol −1 nitrogen monoxide in nitrogen, respectively [12], CCQM-K116: 10 µmol mol −1 water in nitrogen [13], CCQM-K90: 2 µmol mol −1 formaldehyde in nitrogen [14], CCQM-K84: 350 nmol mol −1 carbon monoxide in air [15] and CCQM-K94: 10 µmol mol −1 dimethyl sulphide in nitrogen [16]). The data shows that the median submitted uncertainty from the track A comparisons is typically 0.2% relative or lower.…”
Section: Benchmarking the Success Of Key Comparisonsmentioning
confidence: 99%
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“…Figure 1 does not show the results from comparisons at 380 and 480 µmol mol −1 from CCQM-K120 as they fall outside track A. The open circles show the results from five track C comparisons (CCQM-K137a and b: 30 and 70 µmol mol −1 nitrogen monoxide in nitrogen, respectively [12], CCQM-K116: 10 µmol mol −1 water in nitrogen [13], CCQM-K90: 2 µmol mol −1 formaldehyde in nitrogen [14], CCQM-K84: 350 nmol mol −1 carbon monoxide in air [15] and CCQM-K94: 10 µmol mol −1 dimethyl sulphide in nitrogen [16]). The data shows that the median submitted uncertainty from the track A comparisons is typically 0.2% relative or lower.…”
Section: Benchmarking the Success Of Key Comparisonsmentioning
confidence: 99%
“…An approach to benchmarking the performance of individual laboratories, developed by the National Physical Laboratory (NPL), is shown in figure 4 and is illustrated using data from CCQM-K137 (30 µmol mol −1 nitrogen monoxide in nitrogen) [12].The absolute degree of equivalence for each laboratory is plotted against their submitted expanded uncertainty. Both axes are shown on a logarithmic scale.…”
Section: Benchmarking Individual Laboratory Performancementioning
confidence: 99%