Evaluation of the uncertainty statement in the case of mercury speciation analysis

Zsuzsa Jókai, P. Fodor

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Nowadays, the evaluation of the uncertainty statement is more and more incorporated into quality assurance procedures. In this paper, the uncertainty statement of a mercury speciation analytical method is presented using the relationships fixed by GUM (Guide to the Expression of Uncertainty in Measurement). According to the developed analytical method, the sample is digested using an alkaline phase, then phenylation is applied to derivatize the organomercury compounds found in the digested solution. Finally, following solid phase microextraction (SPME) of the phenylated species, detection with GC-AFS is carried out. The main purpose of this work is to identify the analytical steps that have the strongest influence on the reproducibility of the measurements. The presented approach is based on an investigation executed in more steps and so it provides an opportunity to determine the uncertainty of each applied analytical step. Based on the completed experiments, the alkaline digestion and the calibration were the most critical steps regarding reproducibility. Phenylation derivatization, SPME and volume and weight measurements during sample preparation were less dominant processes in this respect.

Original languageEnglish
Pages (from-to)1229-1236
Number of pages8
JournalJournal of Analytical Atomic Spectrometry
Volume24
Issue number9
DOIs
Publication statusPublished - 2009

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Mercury
Organomercury Compounds
Volume measurement
Weighing
Quality assurance
Calibration
Uncertainty
Experiments

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy

Cite this

Evaluation of the uncertainty statement in the case of mercury speciation analysis. / Jókai, Zsuzsa; Fodor, P.

In: Journal of Analytical Atomic Spectrometry, Vol. 24, No. 9, 2009, p. 1229-1236.

Research output: Contribution to journalArticle

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