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Integrated 3D printed heaters for microfluidic applications: Ammonium analysis within environmental water

Citation

Fornells Vernet, E and Murray, E and Waheed, S and Morrin, A and Diamond, D and Paull, B and Breadmore, MC, Integrated 3D printed heaters for microfluidic applications: Ammonium analysis within environmental water, Analytica Chimica Acta, 1098 pp. 94-101. ISSN 0003-2670 (2020) [Refereed Article]

Copyright Statement

Copyright 2019 Published by Elsevier B.V.

DOI: doi:10.1016/j.aca.2019.11.025

Abstract

A multi-material 3D printed microfluidic reactor with integrated heating is presented, which was applied within a manifold for the colorimetric determination of ammonium in natural waters. Graphene doped polymer was used to provide localised heating when connected to a power source, achieving temperatures of up to 120 C at 12 V, 0.7 A. An electrically insulating layer of acrylonitrile butadiene styrene (ABS) polymer or a new microdiamond-ABS polymer composite was used as a heater coating. The microdiamond polymer composite provided higher thermal conductivity and uniform heating of the serpentine microreactor which resulted in greater temperature control and accuracy in comparison to pure ABS polymer. The developed heater was then applied and demonstrated using a modified Berthelot reaction for ammonium analysis, in which the microreactor was configured at a predetermined optimised temperature. A 5-fold increase in reaction speed was observed compared to previously reported reaction rates. A simple flow injection analysis set up, comprising the microfluidic heater along with an LED-photodiode based optical detector, was assembled for ammonium analysis. Two river water samples and two blind ammonium standards were analysed and estimated concentrations were compared to concentrations determined using benchtop IC. The highest relative error observed following the analysis of the environmental samples was 11% and for the blind standards was 5%.

Item Details

Item Type:Refereed Article
Keywords:3D printed heater, microfluidics, flow injection analysis, ammonium, LED-based optical detection, water analysis, analytical chemistry
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Separation science
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Fornells Vernet, E (Miss Elisenda Fornells Vernet)
UTAS Author:Waheed, S (Ms Sidra Waheed)
UTAS Author:Paull, B (Professor Brett Paull)
UTAS Author:Breadmore, MC (Professor Michael Breadmore)
ID Code:143957
Year Published:2020
Funding Support:Australian Research Council (IC140100022)
Web of Science® Times Cited:12
Deposited By:Chemistry
Deposited On:2021-04-12
Last Modified:2022-01-06
Downloads:0

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