Round robin experiment

J. Homer, Microhardness Testing of Plating Coatings Recent Round-Robin Experiences, ia Ref. 47. 

Hooker, S. B., H. Clasutre, J. Ras, L. Van Heukelem, C. Targa, R. Barlow, and H. Sessions. 2000. The first SeaWiFS HPLC analysis round-robin experiment (SeaHARRE-1), SeaWiFS Postlaunch Technical Report Series. S.B. Hooker and E. R. Firestone, eds. NASA Technical Memorandum 2000-206892, Vol. 14,20 pp. 

Round robin experiment Different people in several laboratories analyze identical samples by the same or different methods Disagreement beyond the estimated random error is systematic error. 

Round-robin experiments have been conducted to compare the results between laboratories [15], and the variation of results within a laboratory have been studied [16]. Large variations in calculated molecular masses have been observed, but not generally explained. 

Matter The laboratories and the data which we presented are all in the report. All of them are specialist laboratories with long experience in this field. We made the condition that the accuracy of the analyses be examined with the help of standard reference materials, and furthermore, that the laboratories also participated regularly in round robin experiments. It is clear that the most modern methods were used for these analyses. 

Mutterz Are you only referring to the round robin experiment We have not actually evaluated this round robin experiment yet, but, I can now say that we certainly do not have the large range of scatter that was just presented here. 

It is important that round-robin exercises be organized using materials and analytes relevant to the ocean sciences and that laboratories be encouraged to participate, even at an early stage in their experience with the relevant analytical techniques. 

Results of this round robin (excluding laboratories using other than 0.125 in. anvils), shown in Table V, still demonstrate a less than satisfactory interlaboratory variation in crush results among nine laboratories using different pieces of crush strength apparatus. In addition, one of the laboratories conducted experiments which indicated moisture... 

Welch et al. evaluated analytical procedures and environmental issues. They investigated methods for the extraction and detection of cocaine, some of its metabolites, morphine, and codeine from hair. They concluded from a round-robin study that extractions with 0.1 ATHCL are as efficient to remove the target compounds from hair as enzymatic digestion that dissolve the hair. GC/MS with either El or Cl provides accurate determinations of the targeted compounds. External contamination by powdered or vapor-deposited cocaine was incompletely removed by all approaches tested, making it difficult to differentiate incorporated drug from external contamination. This was also proved in extensive laboratory experiments by Wang and Cone. ... 

Even in those cases where an aiialysis is qualitative, quantitative measures are employed in the processes associated with signal acquisition, data extraction, and data processing. The comparison of, say, a sample s infrared spectrum with a set of standard spectra contained in a pre-recorded database involves some quantitative measure of similarity in order to find and identify the best match. Differences in spectrometer performance, sample preparation methods, and the variability in sample composition due to impurities will all serve to make an exact match extremely unlikely. In quantitative analysis the variability in results may be even more evident. Within-laboratory tests amongst staff and inter-laboratory round-robin exercises often demonstrate the far from perfect nature of practical quantitative analysis. These experiments serve to confirm the need for analysts to appreciate the source of observed differences and to understand how such errors can be treated to obtain meaningful conclusions from the analysis. 

Technical Working Area 3, Structural Ceramics, has conducted thirteen major round robins over the course of 13 years, including five round robins and 4,500 experiments on fracture toughness alone.The 1993 to 1994 round robin featured the surface crack in flexure (SCF) method. Twenty laboratories around the world obtained very consistent results on test specimens from a single billet (designated E ) of the NC... 

The original purpose of the lUPAC (compiled by Everett et al. [40]) round-robin investigation was to create some confidence in the methodology of adsorption isotherm measurements. Standard samples from the same production batches were used and various laboratories performed the same experiments. The results were not intended as standard curves but the agreement between the various laboratories was generally very good, within 2%. Therefore, these would be as good standards as one would be able to... 

The QPA of hydrated cements by XRD is not straightforward. It is important to stress that the XRD data of complex systems should not be analysed by black box approaches. Round-robins on QPA have revealed that the accuracy of the results, even for simple systems, is highly dependent on the adopted analysis strategy and the skill and experience of the analyst (Madsen et al. 2001 Scarlett et al. 2002). The experimenter should have... 

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