Analytical Chemistry

Citizen-Led Sampling to Monitor Phosphate Levels in Freshwater Environments Using a Simple Paper Microfluidic Device


We demonstrate how a combination of paper microfluidic devices and handheld mobile technology can be used by citizen scientists to carry out a sustained water monitoring campaign. We have developed a paper-based analysis device and a 3 minute sampling workflow that requires no more than a container, a test device and a smartphone app. The contaminant measured in these pilots are phosphates, detectable down to 3 mg L-1. Together these allow volunteers to successfully carry out cost-effective, high frequency, phosphate monitoring over an extended geographies and periods.

Version notes

Version 1.0


Thumbnail image of Preprint Riverdip .pdf
download asset Preprint Riverdip .pdf 1 MB [opens in a new tab]

Supplementary material

Thumbnail image of Preprint Riverdip SI.pdf
download asset Preprint Riverdip SI.pdf 11 MB [opens in a new tab]
Preprint Riverdip SI

Supplementary weblinks