Paired emitter–detector diode array for colorimetric detection of water treatment chemicals
| dc.contributor.author | Olivier, Duane | |
| dc.contributor.author | Joubert, Trudi-Heleen | |
| dc.date.accessioned | 2026-06-05T13:06:48Z | |
| dc.date.available | 2026-06-05T13:06:48Z | |
| dc.date.issued | 2025-09-13 | |
| dc.description | DATA AVAILABILITY STATEMENT : Additional data can be obtained from the authors. NOTE : Presented at the Micro Manufacturing Convergence Conference, Stellenbosch, South Africa, 7–9 July 2024. | |
| dc.description.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. | |
| dc.description.department | Electrical, Electronic and Computer Engineering | |
| dc.description.librarian | am2026 | |
| dc.description.sdg | SDG-06: Clean water and sanitation | |
| dc.description.sdg | SDG-12: Responsible consumption and production | |
| dc.description.sponsorship | Funded by the South African Department of Science and Innovation Nano and Micro Manufacturing Facility grant. | |
| dc.description.uri | https://www.mdpi.com/journal/engproc | |
| dc.identifier.citation | Olivier, D. & Joubert, T.-H. Paired Emitter–Detector Diode Array for Colorimetric Detection of Water Treatment Chemicals. Engineering Proceedings 2025, 109, 10: 1-5. https://doi.org/10.3390/engproc2025109010. | |
| dc.identifier.issn | 2673-4591 (online) | |
| dc.identifier.other | 10.3390/engproc2025109010 | |
| dc.identifier.uri | http://hdl.handle.net/2263/110455 | |
| dc.language.iso | en | |
| dc.publisher | MDPI | |
| dc.rights | © 2025 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license. | |
| dc.subject | Absorption | |
| dc.subject | Electromagnetic spectrum | |
| dc.subject | Paired emitter–detector diode (PEDD) | |
| dc.title | Paired emitter–detector diode array for colorimetric detection of water treatment chemicals | |
| dc.type | Article |