Analytical performance specifications for trace elements in biological fluids derived from six countries federated external quality assessment schemes over 10 years.
Josiane ArnaudCas WeykampRoss WenzelMarina PatriarcaMontserrat González-EstechaLiesbeth JanssenMa'atem Beatrice Fofou-CaillierezMontserrat Ventura AlemanyValeria PatriarcaIrene de GraafRenaud PersoonsMariona PanadèsBernard ChinaMarieke Te WinkelHans van der VuurstMarc H M ThelenPublished in: Clinical chemistry and laboratory medicine (2024)
The characteristic function was a useful means of deriving APS for trace elements in biological fluids where biological variation data or outcome studies were not available. However, OELM external quality assurance scheme data suggests that the characteristic functions are not appropriate for all elements.