ESTIMATION OF MEASUREMENT UNCERTAINTY IN THE DETERMINATION OF Fe CONTENT IN POWDERED TONIC FOOD DRINK USING GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY

https://doi.org/10.22146/ijc.21538

Harry Budiman(1*), Fransiska Sri H(2), Krismastuti Krismastuti(3), Nuryatini Nuryatini(4)

(1) Research Centre for Chemistry, Indonesian Institute of Sciences, Kawasan PUSPIPTEK Serpong, Banten 15314, Indonesia
(2) Research Centre for Chemistry, Indonesian Institute of Sciences, Kawasan PUSPIPTEK Serpong, Banten 15314, Indonesia
(3) Research Centre for Chemistry, Indonesian Institute of Sciences, Kawasan PUSPIPTEK Serpong, Banten 15314, Indonesia
(4) Research Centre for Chemistry, Indonesian Institute of Sciences, Kawasan PUSPIPTEK Serpong, Banten 15314, Indonesia
(*) Corresponding Author

Abstract


The evaluation of uncertainty measurement in the determination of Fe content in powdered tonic food drink using graphite furnace atomic absorption spectrometry was carried out. The specification of measurand, source of uncertainty, standard uncertainty, combined uncertainty and expanded uncertainty from this measurement were evaluated and accounted. The measurement result showed that the Fe content in powdered tonic food drink sample was 569.32 µg/5g, with the expanded uncertainty measurement ± 178.20 µg/5g (coverage factor, k = 2, at confidende level 95%). The calibration curve gave the major contribution to the uncertainty of the final results.

 

Keywords: uncertainty, powdered tonic food drink, iron (Fe), graphite furnace AAS


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DOI: https://doi.org/10.22146/ijc.21538

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Indonesian Journal of Chemisty (ISSN 1411-9420 / 2460-1578) - Chemistry Department, Universitas Gadjah Mada, Indonesia.

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