Jump to main content
Jump to site search

Issue 5, 2019
Previous Article Next Article

Multi-energy calibration for the determination of non-metals by high-resolution continuum source molecular absorption spectrometry

Author affiliations

Abstract

Spectra of diatomic molecules are rich in fine structures which may be used for different analytical applications in high-resolution continuum source molecular absorption spectrometry (HR-CS MAS). If several bands of a given diatomic molecule are simultaneously measured, they may be used in multi-energy calibration (MEC), a method based on the use of several wavelengths of the same absorbing/emitting entity to improve the accuracy in analytical atomic spectrometry. In this work, MEC is used for the first time as a calibration method for HR-CS MAS using flame (F) and graphite furnace (GF) atomizers. Methods were developed and applied for the determination of N, P and S in fertilizers by HR-CS F MAS and Cl in milk by HR-CS GF MAS. Chlorine, N, P and S were measured via CaCl (10 band heads), NO (13 band heads), PO (13 band heads) and CS (14 band heads), respectively. No statistically significant differences were observed between Cl, N, P and S concentrations determined by MEC and by the conventional external standard calibration (paired t-test at a 95% confidence level, n = 3). Recoveries were in the 97–109% (Cl), 97–103% (P), 99–109% (S) and 98–99% (N) intervals, and the relative standard deviations (n = 12) for Cl, N, P, and S were typically 6%, 3%, 2% and 2%, respectively.

Graphical abstract: Multi-energy calibration for the determination of non-metals by high-resolution continuum source molecular absorption spectrometry

Back to tab navigation

Supplementary files

Article information


Submitted
07 Jan 2019
Accepted
22 Feb 2019
First published
12 Mar 2019

J. Anal. At. Spectrom., 2019,34, 972-978
Article type
Paper

Multi-energy calibration for the determination of non-metals by high-resolution continuum source molecular absorption spectrometry

A. L. Vieira, D. A. Gonçalves, A. Virgilio, E. C. Ferreira, B. T. Jones, G. L. Donati and J. A. Gomes Neto, J. Anal. At. Spectrom., 2019, 34, 972
DOI: 10.1039/C9JA00006B

Social activity

Search articles by author

Spotlight

Advertisements