UNCERTAINTY BUDGET FOR SIMULTANEOUS DETERMINATION OF MINOR AND MAJOR IONS IN SEAWATER WITH ION CHROMATOGRAPHY CONFRONTED WITH UNCERTAINTIES IN CONCENTRATIONS OF CALIBRATION STANDARDS

作者：Gros Natasa^*; Camoes M F; Bettencourt da Silva Ricardo J N

来源：Analytical Letters, 2010, 43(7-8): 1317-1329.

DOI：10.1080/00032710903518732

• Cross contamination
• Linear calibration model
• Multi-ion calibration standards
• Seawater
• Uncertainty budget

This work deals with the development and application of the detailed uncertainty budget for simultaneous determination of minor and major ions in seawater and derived saline solutions. Combination and sequence of gravimetric or/and volumetric steps involved in introducing each particular ion into stock and final combined calibration standards; cross contamination of chemicals and dilution of samples were critically assessed and their significance to the combined uncertainty was evaluated. The main uncertainty components were identified and quantified for all anions and cations determined with ion chromatography in seawater and estuary water and confronted with uncertainties associated with concentrations of ions in combined calibration standards. Similar uncertainty components reflect very differently upon different ions.

• 出版日期2010