Elemental determination of steels by Atomic Emission Spectroscopy

Authors

  • Mario Pomares Alfonso Universidad de la Habana

Abstract

Elemental steels' determinations have fulfilled Atomic Emission Spectrometry using PV 8020 Philips Spectrometer. Some fundamental instrumental variables such as exposition and pre-burn times together with inductance (L) and capacitance (C) values excitation source's and argon flux were selected according with a convenient combination of single and multivariate performed experiments. An interesting dependence between intensity change of analytical signal and total energy excitation of the elements was obtained during Ar flux optimization. This dependence was explained through the energy transfer process in the case of C, S, P, Ti, Fe, Ni and Cr. Energy has transferred from the excited (metastable and ionized) argon atoms to atoms of elements by means of second kind collisions (inelastic collisions). The other studied elements (Si, Mo and Mn) show a different behavior, which may be due to the existence of another complex process simultaneously occurring in the plasma like the known matrix effect between components of sample. Analytical procedure for determination of S, P, C, Si, Cr, Mn, Ni, and Mo in alloyed steels has developed. The exactitude was checked by comparing results obtained with this procedure and those on the same sample in other laboratory or reported values in analyzed certified steel material. Significant differences were not observed. The reproducibility, evaluated as relative standard deviation of concentration, was between 0.7 and 11 % according to a determined element.

Published

2022-06-01

How to Cite

Pomares Alfonso, M. . (2022). Elemental determination of steels by Atomic Emission Spectroscopy. NATIONAL CENTER FOR SCIENTIFIC RESEARCH (CENIC) CHEMICAL SCIENCES JOURNAL, 32(3). Retrieved from https://revista.cnic.cu/index.php/RevQuim/article/view/1661

Issue

Section

Research articles