Monday, August 2

Can a touch screen detect toxins in water? | Digital Trends Spanish

According to a new scientific study, the touch screen of a smartphone can be used to analyze drinking water and other liquids.

A group of researchers from the University of Cambridge demonstrated how a standard touch screen can be used to identify common ionic contaminants in soil or drinking water by dropping liquid samples onto the screen.

According to the scientists, the sensitivity of the touch screen sensor is comparable to that of typical equipment used in laboratories, which would make it useful in resource-poor environments.

Those in charge of the study found that the liquids produced a measurable change in capacitance, which is the property that bodies have to maintain an electrical charge.

In addition, each liquid had its own signature, which was based on the concentration and charge of its ions.

Thus, researchers hope that one day cell phone screens can be used for tasks such as checking for contaminants such as arsenic in drinking water.

“This is a starting point for a broader exploration of the use of touch screen detection in mobile technologies and the creation of tools accessible to everyone, allowing rapid measurement and communication of data,” the researchers explain. .

Professionals also suggest that for best results, a portion of the touchscreen should be designed for the task, as screens today are optimized for the detection of users’ fingertips.

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