Enhancement of a microfluidic system for the colorimetric detection of phosphate in fresh water systems Rachel Bracker 1,2 , Harry Beggy 2,3 , Louis Free 2,3 , Joyce O’Grady 1,2 , Sean Power 2,4 , Nigel Kent 2,4 , Fiona Regan 1,2 , Blánaid White 1,2 1 School of Chemical Sciences, Dublin City University, Ireland, 2 DCU Water Institute, Dublin City University, Ireland, 3 School of Electronic Engineering, Dublin City University, Ireland, 4 School of Mechanical and Manufacturing Engineering, Dublin City University, Ireland Low cost, reliable, and robust optical analysis systems for the detection of nutrients in water systems is a major area of focus in research today. This poster will discuss a project working to enhance a previously demonstrated lab-on-a-disc centrifugal microfluidic system for the colorimetric detection of phosphate in freshwater. The previous system utilized a horizontally based diode/photodiode combination for colorimetric detection of the analyte at 880 nm using the molybdenum blue method 1 . While this system has obtained good sensitivity and decent customizability, it was subject to deformities and discrepancies on the edges of the disk caused during the manufacturing process. This new system will utilize a vertically based spectrometer which will eliminate the impact of these discrepancies caused during disk production and assembly. Results from preliminary studies demonstrating its response to the analyte phosphate as KH 2 PO 4 will be presented and evaluated, along with studies into the reproducibility of the system and analytical performance criteria. References 1. Case Stud. Chem. Environ. Eng., Dec. 2021, 4, 100168
IP01
© The Author(s), 2022
Made with FlippingBook Learn more on our blog