Work

Paired Emitter–Detector Diode Array for Colorimetric Detection of Water Treatment Chemicals

Year: 2025

Type: conference-paper

Abstract: Optical spectroscopy is a versatile analytical technique with a diverse range of applications. Point-of-need systems are required to be affordable, miniaturized instruments that are easy to use. This paper proposes using an array of LEDs to create paired emitter detector diodes where commercial LEDs function as both a light source and detector. This system can measure the concentration of different chemicals via a set of discrete wavelengths. Calibration curves are presented for series of known concentrations of three water treatment chemicals using the K-matrix method. The spectral fingerprint identifies the chemical correctly with 99% accuracy using the Pearson correlation.

DOI: 10.3390/engproc2025109010

Authors: Duane Olivier, Trudi-Heleen Joubert

Institution: University of Pretoria

Language: English

Topic: Spectroscopy and Chemometric Analyses

Subfield: Analytical Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: gold

Funder: Department of Science and Innovation, South Africa

OpenAlex ID: W4414184759

FWCI:

Cites: 10

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