A Low-Cost Colorimetric Sensor for On-Site Automatic Monitoring of Nitrite in Aquaculture

Danh, Lương Vinh Quốc; Thien, Duong Chi; Binh, Quach Dat; Hoan, Tran Nhut Khai; Tuấn, Lê Anh

doi:10.1109/icsima50015.2021.9526324

Cited by 1 publication

(2 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Generally speaking, two major LED/RGB sensor implementations have been reported. In the first implementation [ 4 , 5 ], the LED and the sensor are placed next to each other on the same PCB (Printed Circuit Board), and the light reflects on a surface on the other side of the cuvette. This implementation is more common in the literature, likely because it can be implemented using RGB sensor development kits, which usually come in this configuration.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, compared to a single photodiode, RGB sensors are able to identify in which frequency range the observed phenomenon occurs. In [ 5 ], the authors present an RGB sensor-based system for the monitoring of nitrite in aquaculture ponds. Peristaltic pumps were used to automatically sample and mix pond water with a reagent in a detection chamber in which the RGB sensor was located.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design Aspects for Portable LED-Based Colorimetric Characterisation Systems Targeting Liquid Analytes

Dupont,

Stoukatch,

Laurent

et al. 2024

Sensors

View full text Add to dashboard Cite

Colorimetric characterisation systems based on LEDs and RBG sensors are straightforward to implement, are highly integrable allowing for portable measurement systems and can be constructed using widespread and affordable components. They have already proved to be a satisfactory solution in several applications related to chemical analysis. In this paper, we present an RGB sensor-based prototype for colorimetric characterisation, which can accommodate cuvettes with optical paths of 10 mm and 40 mm. We assessed the impact of experimental condition parameters such as the variability of the analyte volume in the cuvette, as well as the presence of floating particles or deposits at the bottom of the cuvette. While these would not impact the result given by a spectrophotometer that generally has a directional light source, they must be considered in LED/RGB sensor analysers in which the light path is not tightly controlled. We demonstrated that there is a minimal sensor height above the bottom of the cuvette and a minimal analyte level (both depending on the prototype optical path length) above which the analyte volume and the presence of floating particles and deposits have no impact on the prototype output signal. Finally, based on these results, we proposed a test method for a quick dye-displacement assay, in which the reagent is a dye-loaded molecularly imprinted polymer that is poured directly into a cuvette.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%