Identification and quantification of 16 inorganic ions in water by Gaussian curve fitting of near-infrared difference absorbance spectra

Gerrit W. Steen*, Elmar C. Fuchs, Adam D. Wexler, Herman L. Offerhaus

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

6 Citations (Scopus)
16 Downloads (Pure)

Abstract

This study shows two novel fitting strategies applied to differential absorbance spectra for identification and quantification of electrolytes. The effects of 16 dissolved salts were investigated in the wavelength range from 14000 to 9091 wavenumbers (714-1100 nm) by linear fits of the differential absorbance values (Y V;c offset bV × c) recorded for each wavenumber () and concentration (c) ranges from 500 to 30 mM. The slopes (b) of these fits resulted in clear fingerprints of the electrolytes. A narrow bandwidth (10754-9618 wavenumbers) sensor can be created using truth tables resulting from the Gaussian curve fitting method.

Original languageEnglish
Pages (from-to)5937-5942
Number of pages6
JournalApplied Optics
Volume54
Issue number19
DOIs
Publication statusPublished - 1 Jul 2015

Keywords

  • 2023 OA procedure

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