Reference materials and analytical standards to stimulate improved laboratory performance: Experience from the external quality assessment scheme for trace elements in biological samples

1996 ◽  
Vol 123 (1-4) ◽  
pp. 251-260 ◽  
Author(s):  
Andrew Taylor
Keyword(s):  
Trace Elements ◽  
Quality Assessment ◽  
Reference Materials ◽  
Biological Samples ◽  
External Quality Assessment ◽  
External Quality ◽  
External Quality Assessment Scheme ◽  
Laboratory Performance ◽  
Analytical Standards

Findings of an external quality assessment scheme for determining aluminum in dialysis fluids and water

1994 ◽  
Vol 40 (8) ◽  
pp. 1517-1521 ◽  
Author(s):  
A Taylor ◽  
R J Briggs ◽  
C Cevik
Keyword(s):  
Quality Assessment ◽  
Reference Materials ◽  
Significant Influence ◽  
Matrix Effects ◽  
External Quality Assessment ◽  
Analytical Performance ◽  
External Quality ◽  
External Quality Assessment Scheme ◽  
Dialysis Fluids

Abstract The analytical performance of laboratories participating in the dialysis fluids and water aluminum program of the Guildford External Quality Assessment Scheme over the period 1986-1993 has been reviewed. For aluminum concentrations > 3.33 mumol/L in dialysis fluids, the between-laboratory CV has fallen from approximately 36% to 23%, whereas for specimens of water the reduction was from 36% to approximately 18%. Improvements at lower concentrations were less impressive. Performance of individual participants varied; only a few consistently provided accurate results. Many of the participants are able to measure serum aluminum well, so lack of expertise is not responsible for poor results. We suggest that matrix effects associated with different specimen types have a significant influence on performance and that due account is not always taken of these factors. Resolution of these problems would be aided by appropriate reference materials.

Twenty years of the Me.Tos. Project: an Italian national external quality assessment scheme for trace elements in biological fluids

2005 ◽  
Vol 79 (1-2) ◽  
pp. 337-340 ◽  
Author(s):  
Marina Patriarca ◽  
Ferdinando Chiodo ◽  
Marco Castelli ◽  
Federica Corsetti ◽  
Antonio Menditto
Keyword(s):  
Trace Elements ◽  
Quality Assessment ◽  
External Quality Assessment ◽  
Biological Fluids ◽  
External Quality ◽  
External Quality Assessment Scheme
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