Abstract
The uncertainty of the Kjeldahl method for determination of nitrogen in insulin was evaluated according the procedure described in the Guide to the Expression of Uncertainty in Measurement. The relative standard uncertainty of the method was found to be 0.19%, compared to the relative intermediate precision experimentally found to be 0.085%. The uncertainty components were organized in Tables, which allowed an easy overview and evaluation. The largest contribution to the uncertainty came from volumetric equipment. Systematic uncertainty budgets such as the design presented here facilitate the uncertainty evaluation process and makes it easier to compare uncertainty evaluations performed by different analysts.
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References
International Standard ISO/IEC 17025 (1998) General requirements for the competence of testing and calibration laboratories (Draft). International Or- ganization for Standardization, Geneva
BIPM, IEC, IFCC, ISO, IUPAC, IUPAP, OIML (1993) Guide to the expression of uncertainty in measurement. International Organization for Standardization, Geneva
EURACHEM (1995) Quantifying un- 6. certainty in analytical measurement, 1st edn. EURACHEM
Miller JC, Miller JN (1993) Statistics 7. for analytical chemistry, 3rd edn. Ellis Harwood, New York
Kristiansen J, Christensen JM, Nielsen JL (1996) Mikrochim Acta 123: 241–249
Hansen AM, Kristiansen J, Nielsen JL, Byrialsen K, Christensen JM (1990) Talanta 50: 367–379
ISO (1993) International vocabulary of basic and general terms in metrology (VIM), 2nd edn. International Organization for Standardization, Geneva
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Anglov, T., Petersen, I.M., Kristiansen, J. (2003). Uncertainty of nitrogen determination by the Kjeldahl method. In: De Bièvre, P., Günzler, H. (eds) Measurement Uncertainty in Chemical Analysis. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-05173-3_49
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DOI: https://doi.org/10.1007/978-3-662-05173-3_49
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