论文信息 - Application of the FAPAS protocol to a proficiency testing on Pb and Cd extracted from glazed ceramic

Application of the FAPAS protocol to a proficiency testing on Pb and Cd extracted from glazed ceramic

The proficiency-testing scheme (CNCA-07-06) concerning lead and cadmium determination extracted from glazed ceramic surfaces involved 43 Chinese laboratories as participants, and has been well implemented. All the test materials passed the statistical homogeneity tests, and were deemed suitable for distribution. Reference values were determined from the obtained results and the performance of participants was based on z-scores. As a result, the majority of participants obtained satisfactory z-scores and laboratories that need to revise their procedures were singled out. Overall, about 8.5% of all results submitted in this PT round were unsatisfactory in terms of z-scores (22 out of 258 total data sets submitted), while the percentage of doubtful z-scores was 4.6% (12 out of 258 total data sets). Besides, the factors that might be associated with unsatisfactory results were also evaluated and suggestions were made to help improve the performance of laboratories in this PT.

[1] Richard E. Lawn,et al. Proficiency Testing in Analytical Chemistry , 1997 .

[2] Y. Vander Heyden,et al. Set-up and evaluation of interlaboratory studies. , 2007, Journal of chromatography. A.

[3] Jean Pauwels,et al. The study of the stability of reference materials by isochronous measurements , 1998 .

[4] V. Naithani,et al. Heavy Metal Content in Some Therapeutically Important Medicinal Plants , 2004, Bulletin of environmental contamination and toxicology.

[5] T Fearn,et al. A new test for 'sufficient homogeneity'. , 2001, The Analyst.

[6] M. Ricci,et al. Critical evaluation of interlaboratory comparisons for PAHs and pesticides in organic standard solutions in support of the implementation of the Water Framework Directive , 2007 .

[7] J. S. Kane,et al. GeoPT - A Proficiency Test for Geoanalysis† , 1997 .

[8] Michael Thompson,et al. Recent trends in inter-laboratory precision at ppb and sub-ppb concentrations in relation to fitness for purpose criteria in proficiency testing , 2000 .

[9] John Gilbert,et al. Assessment of the performance of pesticide-testing laboratories world-wide through proficiency testing , 2006 .

[10] Jean Pauwels,et al. Uncertainty calculations in the certification of reference materials , 2001 .

[11] N. Egiebor,et al. Assessment of trace elements in canned fishes (mackerel, tuna, salmon, sardines and herrings) marketed in Georgia and Alabama (United States of America) , 2005 .