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Uncertainty budget for multi-elemental analysis of plant nutrients in conifer foliar material using inductively coupled plasma atomic emission spectrometry (ICP-AES)
2012 (English)In: Accreditation and Quality Assurance, ISSN 0949-1775, E-ISSN 1432-0517, Vol. 17, no 3, 301-313 p.Article in journal (Refereed) Published
Abstract [en]

Measurement uncertainties evaluated according to GUM were given in an uncertainty budget for the measurement of mass fractions of 12 elements in conifer tree needle materials. The measurement was performed using ICP-AES, with prior microwave digestion of the dried sample material. The uncertainty budget for Ca as an example showed that correction for a systematic error was the main source of measurement uncertainty. The key to reduced measurement uncertainty therefore lies in identifying the main sources of systematic errors, and reducing the uncertainty associated with their correction. The usefulness of the uncertainty budget was demonstrated in its application to method validation, to the design of a quality control program, and finally for guiding method optimization.

Place, publisher, year, edition, pages
2012. Vol. 17, no 3, 301-313 p.
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Analytical Chemistry
URN: urn:nbn:se:umu:diva-119837DOI: 10.1007/s00769-011-0859-xISI: 000304400800009OAI: diva2:924766
Available from: 2016-04-29 Created: 2016-04-29 Last updated: 2016-06-02Bibliographically approved

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Ohlsson, Anders
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