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Publication Citation: Achieving 0.2 % Relative Expanded Uncertainty in Ion Chromatography Analysis using a High-Performance Methodology

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Author(s): Ryan G. Brennan; Therese A. Butler; Michael R. Winchester;
Title: Achieving 0.2 % Relative Expanded Uncertainty in Ion Chromatography Analysis using a High-Performance Methodology
Published: April 12, 2011
Abstract: A high-performance (HP) technique that was originally developed for inductively coupled plasma optical emission spectrometry (ICP-OES) has been successfully translated to ion chromatography (IC) to enable analyses with extremely low uncertainty. As an example application of the HP-IC methodology, analyses of several National Institute of Standards and Technology (NIST) Standard Reference Materials (SRMs) in the SRM 3180 series of anion standard solutions are reported. The relative expanded uncertainty values expressed at 95 % confidence for these analyses range from 0.087 % to 0.27 % and average 0.18 %. Strong correlation between analyte and internal standard anion peak heights or peak areas, as well as the use of a unique drift-correction approach, is shown to be important for attaining such low uncertainty.
Citation: Analytical Chemistry
Volume: 83
Pages: pp. 3801 - 3807
Keywords: high-performance (HP); ion chromatography (IC); low uncertainty; anion SRM
Research Areas: Inorganic Analytical Chemistry
PDF version: PDF Document Click here to retrieve PDF version of paper (151KB)