Journal
JOURNAL OF ANALYTICAL CHEMISTRY
Volume 75, Issue 4, Pages 474-478Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/S1061934820040115
Keywords
atomic emission spectrometry; nitrogen microwave plasma; matrix effect; impurities; acid
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Funding
- Program of the Federal Scientific Research Institute of State Academies of Sciences [V.45.1.4]
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The effect of matrix elements (Na, In, Bi, Zn, Cu) and nitric and hydrochloric acids on the analytical signals of impurity elements in nitrogen microwave-plasma atomic emission spectrometry (MP AES) was studied. In the range of acid concentrations 0.1-0.5 M (for rare-earth elements, 0.1-0.9 M), the analytical signals of the elements did not change. The presence of a matrix element in a concentration of 1 wt % led to a significant change in the signal for most elements, which must be taken into account in selecting a calibration strategy. In MP AES, it is necessary to fully comply with the conformity of samples and calibration solutions regarding the type and concentration of acid and matrix elements.
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