Matrix effect during element determination trace in the Ca-Mg-Na system by Spectroscopy Atomic Emission with Inductively Coupled Plasma

Authors

  • Erick Reyes Suárez Instituto Cubano de Investigaciones de los Derivados de la Caña de Azúcar
  • Mario Pomares Alfonso Universidad de la Habana
  • Margarita Villanueva Tagle Universidad de la Habana

Abstract

Inductively Coupled Plasma Atomic Emission Spectroscopy (ICPAES) occupies an outstanding place among the techniques that are used for the analysis of environmental samples. In particular, it constitutes an established technique for analysis of natural waters. In this case, some advantages should be considered, for example: easy introduction in the plasma, minimal treatment of samples not requiring a previous concentration process for many analytes and different analysis purposes, determination of major and trace elements due to the wide linear concentration intervals of the calibration curves, as well as low detection limits and appropriate precision. However, in some kind of waters, the variability between samples and relative high concentration of major elements Ca, Mg and Na introduce systematic errors in the ICP-AES analysis. In this work. A study of the influence of the Ca, Mg and Na (0 to 2 000 mg · L-1) and their possible combinations on the analytical intensity signal of 10 analytes (Li, Cu, Zn, Ba, Fe, Cr, Co, Ni, Cd and Pb) with a variable total potential excitation in the 1,85 - 14,79 eV interval was carried out. The calcium and magnesium matrix effect increased with the total potential excitation of elements, while these effects decreased for sodium matrix. The application of 2n factorial designs allowed appropriate description and diagnosis of the effect; as well as the implementation of a correction procedure, which improved the accuracy of the results until one order of magnitude depending on the determined element.

Published

2022-06-01

How to Cite

Reyes Suárez, E. ., Pomares Alfonso, M. ., & Villanueva Tagle, M. . (2022). Matrix effect during element determination trace in the Ca-Mg-Na system by Spectroscopy Atomic Emission with Inductively Coupled Plasma. NATIONAL CENTER FOR SCIENTIFIC RESEARCH (CENIC) CHEMICAL SCIENCES JOURNAL, 32(3), 121-127. Retrieved from https://revista.cnic.cu/index.php/RevQuim/article/view/1662

Issue

Section

Research articles