Short- and long-term stability of electrolytic conductivity certified reference materials

Electrolytic conductivity is a common parameter measured within industry. Proper usage of electrolytic conductivity sensors requires the periodic calibration using solutions of known conductivity. This parameter can be disseminated through the use of certified reference materials (CRMs) produced acc...

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Bibliographic Details
Published in:Accreditation and quality assurance 2020-04, Vol.25 (2), p.127-138
Main Authors: Deleebeeck, L., Avnskjold, J., Snedden, A.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Biochemistry
Calibration
Chemistry
Chemistry and Materials Science
Commercial Law
Ecotoxicology
Food Science
General Paper
Geometry
High density polyethylenes
Humidity
Marketing
Parameters
Polyethylene terephthalate
Property values
Reference materials
Shelf life
Stability analysis
Temperature
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Summary:Electrolytic conductivity is a common parameter measured within industry. Proper usage of electrolytic conductivity sensors requires the periodic calibration using solutions of known conductivity. This parameter can be disseminated through the use of certified reference materials (CRMs) produced according to ISO 17034. A part of the certification of reference materials relates to their stability both in the material they are packaged in and as a function of time, both at the short- and long-time scales. Electrolytic conductivity CRMs produced at DFM A/S are evaluated for the stability in various bottle types, and under various storage and transport conditions. Materials with nominal conductivity values between 10 mS m −1 and 10 mS m −1 are shown to be stable at short-time (~ 1 month) and long-time (expected shelf life and beyond) scales.
ISSN:0949-1775
1432-0517
DOI:10.1007/s00769-019-01416-5