New Tool Measures Microplastics in Minutes

Researchers at the University of British Columbia have introduced a groundbreaking tool that can quickly and affordably measure the presence of microplastics in everyday items like disposable cups and water bottles. This new development, detailed in a recent ACS Sensors publication, leverages a low-cost, portable device paired with a smartphone app to detect plastic particles as small as 50 nanometers—sizes that are invisible to the naked eye.

Source: TEDx Talks/YouTube

The issue of microplastics in the environment is increasingly alarming, with these particles found not only in our oceans and water supplies but also within human bodies, affecting organs from the brain to the reproductive system. These tiny plastic fragments come from the breakdown of larger plastic items commonly used in daily life such as food containers and eating utensils.

The traditional methods for detecting these particles typically require sophisticated equipment and expert handling. However, the team led by Dr. Tianxi Yang, an assistant professor at UBC, has made significant strides in making this process more accessible and efficient. Their innovative device, which costs just 1.5 cents per test, uses a combination of fluorescent labeling and machine-learning algorithms to deliver results in mere minutes.

To detect the microplastics, researchers use a biodegradable, 3D-printed box equipped with a wireless digital microscope and a green LED light. The process involves placing a small sample of liquid—less than a drop—into the device, where it is exposed to the green light, causing any microplastic particles to glow and be visually counted.

Dr. Yang’s team tested their tool by analyzing how disposable polystyrene cups release microplastics when filled with boiling water. Astonishingly, they found that these cups released hundreds of millions of nano-sized plastic particles after just 30 minutes of contact with the water.

The implications of this technology extend beyond laboratory walls. With its ease of use and rapid feedback, it can serve both professionals in environmental science and individuals curious about their exposure to microplastics. As concerns grow over the health impacts of these particles, this tool offers a timely solution for monitoring and ultimately reducing our exposure to microplastics.

Moving forward, the researchers are focusing on refining the tool’s capabilities to detect various types of plastics and exploring commercial applications to broaden its impact, emphasizing the urgent need for sustainable alternatives to traditional plastic materials.

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