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This is Scientific American 60-Second Science. I'm Cynthia Graber. This'll just take a minute.

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It's similar to a pregnancy test: a drop of liquid on a strip of paper causes an easily seen color change.

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But imagine that kind of simple, cheap technology employed in testing for pollution or health issues, anywhere and on the cheap.

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Researchers at Colorado State University describe such a system in the journal Lab On A Chip.

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Other paper tests may give only slight color differences, and some rely on expensive equipment to read the results.

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For the new technology, the research team designed a system that creates a dramatic color change on the paper.

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The user drops liquid to be analyzed at the bottom of the paper.

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As capillary action pulls the liquid up, substances in the paper react, causing the color change.

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So far, three tests exist for the system.

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One looks for nickel, which can be an environmental pollutant.

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The other two are for glutathione, a health marker, and glucose, for diabetics.

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In trials, the paper tests competed with conventional methods at measuring concentrations.

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The university is now spinning off a company to develop the technology.

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If successful, it could bring cheap, easy analysis to scientists, and citizens around the world.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.

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