Journal Highlight: Development of exact matrix-matching ICP-OES spectroscopy for the analysis of Cu and K in infant formula

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  • Published: Sep 20, 2016
  • Author: spectroscopyNOW
  • Channels: Atomic
thumbnail image: Journal Highlight: Development of exact matrix-matching ICP-OES spectroscopy for the analysis of Cu and K in infant formula
An ICP-OES method was developed as a low-cost alternative to isotope dilution ICP-MS for measuring K and Cu in infant formula, using an exact matrix-matching approach to minimize biases due to matrix mismatch.

Development of exact matrix-matching inductively coupled plasma-optical emission spectroscopy for the analysis of Cu and K in infant formula

Bulletin of the Korean Chemical Society, 2016, 37, 1228-1233
Ye-Ji Lee, Sung Woo Heo, Myung-Sub Han, Youngran Lim and Yong-Hyeon Yim

Abstract: In the present study, we have developed an exact matrix-matching inductively coupled plasma-optical emission spectroscopy (ICP-OES) as a low-cost alternative to the isotope dilution inductively coupled plasma-mass spectrometry (ICP-MS) method for accurate and precise measurements of nutrient elements K and Cu in infant formula. In spite of its high precision and accuracy, ICP-OES analysis of complex samples was not reliable due to biases originating from various matrix effects. The elaborated exact matrix-matching approach tested here demonstrated its potential to minimize biases due to matrix mismatch. The exact matrix-matching ICP-OES method was successfully validated by comparing the results with those from an isotope dilution ICP-MS method. Because the model provides reliable results without significant loss of precision, it will be an excellent choice for major element analysis in a complex sample, especially when isotope dilution is not applicable due to the lack of alternative isotopes or the high cost of enriched isotopes.

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