Portable device detects potentially fatal cyanotoxins

Developed at North Carolina State University (NC State), the device – claimed to be the first of its kind - can be used to detect four common types of cyanotoxins, including two for which the U.S. Environmental Protection Agency (EPA) recently finalised recreational water quality criteria.

Cyanotoxins are produced by cyanobacteria and at high enough levels can cause adverse health effects ranging from headache and vomiting to respiratory paralysis and death.

According to NC State, the new technology can detect anatoxin-a, cylindrospermopsin, nodularin and microcystin-LR. One reason the portable technology may be particularly useful is that EPA finalised water quality criteria in June, 2019 for microcystin-LR and cylindrospermopsin in recreational waters.

“Our technology is capable of detecting these toxins at the levels EPA laid out in its water quality criteria,” said Qingshan Wei, an assistant professor of chemical and biomolecular engineering at NC State and corresponding author of a paper on the work.

“However, it’s important to note that our technology is not yet capable of detecting these cyanotoxins at levels as low as the World Health Organization’s drinking water limit. So, while this is a useful environmental monitoring tool, and can be used to assess recreational water quality, it is not yet viable for assessing drinking water safety.”