Title: Pitzer ion activities in mixed electrolytes for calibration of ion-selective electrodes used in clinical chemistry
Authors : Bastkowski, Frank
Spitzer, Petra
Eberhardt, Ralf
Adel, Beatrice
Wunderli, Samuel
Berdat, Daniel
Andres, Hanspeter
Brunschwig, Olivier
Máriássy, Michal
Fehér, Roger
Demuth, Caspar
Gonzaga, Fabiano Barbieri
Borges, Paulo Paschoal
da Silva Junior, Wiler Batista
Vospělová, Alena
Vičarová, Martina
Srithongtim, Sirinapha
Published in : Accreditation and quality assurance
Volume(Issue) : 18
Issue : 6
Pages : 469
Pages to: 479
Publisher / Ed. Institution : Springer
Issue Date: 23-Dec-2013
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (publication)
Language : English
Subject (DDC) : 610: Medicine and health
Abstract: Metrological comparability as well as reliability of ion activity results measured with ion-selective electrodes (ISE) was investigated within the framework of an interlaboratory comparison between eight partners from national metrology institutes and expert laboratories. Two electrolyte solutions containing the clinically most relevant ions sodium, potassium, magnesium, calcium and chloride having ion activities near the physiological range served as samples. The calibration of the measurement set-ups of the participants was carried out using gravimetrically prepared aqueous electrolyte solutions. The ion activities of these calibration standards were calculated by means of the semiempirical Pitzer model. The measurement uncertainty of the measurement results was calculated according to the guide to the expression of uncertainty in measurement, GUM. Based on a new scale for ion activities traceable to the SI system of units, comparability and reliability of ISE measurement results of clinically relevant ions is realised.
Departement: Life Sciences and Facility Management
Organisational Unit: Institute of Chemistry and Biotechnology (ICBT)
Publication type: Article in scientific journal
DOI : 10.1007/s00769-013-1016-5
ISSN: 0949-1775
1432-0517
URI: https://digitalcollection.zhaw.ch/handle/11475/9580
Appears in Collections:Publikationen Life Sciences und Facility Management

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