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A water test for the world

HAMILTON, April 28, 2014 Inspiration can come in many forms, but this one truly was a breath of fresh air.

A group of McMaster researchers has solved the problem of cumbersome, expensive and painfully slow water-testing by turning the process upside-down.

Instead of shipping water to the lab, they have created a way to take the lab to the water, putting potentially life-saving technology into the hands of everyday people.

The team has reduced the sophisticated chemistry required for testing water safety to a simple pill, by adapting technology found in a dissolving breath strip. Want to know if a well is contaminated? Drop a pill in a vial of water and shake vigorously. If the colour changes, there's the answer.

The development has the potential to dramatically boost access to quick and affordable testing around the world.

"We got the inspiration from the supermarket," says Carlos Filipe, a professor of chemical engineering who worked on the project.

The idea occurred to team member Sana Jahanshahi-Anbuhi, a PhD student in Chemical Engineering who came across the breath strips while shopping and realized the same material used in the dissolving strips could have broader applications.

The technology is expected to have significant public health applications for testing water in remote areas and developing countries that lack testing infrastructure, for example.

The researchers have now created a way to store precisely measured amounts of enzymes and other active agents in pills made from the same naturally occurring substance used in breath strips, putting lab-quality science within instant and easy reach of people who need quick answers to questions such as whether their water is safe.

"This is regular chemistry that we know works but is now in pill form," says John Brennan, director of McMaster's Biointerfaces Institute, where the work took place. "The user can be anybody in a village somewhere who can take a pill out of

Contact: Wade Hemsworth
905-525-1940 x27988
McMaster University

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