What is it about?

The conventional strategies of sampling and detection units in sequence for atmospheric metal measurement are simplified into a sampling/detection interface. A concept of aerosol-into-liquid capture and detection that bridges free-flowing gas and static liquid phases could realize one-step capture and detection via the gas/liquid interface, which presents effective capture of airborne particles down to nanometers size and detection of soluble metals at the nanogram level.

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Why is it important?

Atmospheric soluble metals are strongly associated with adverse health effects. However, the monitoring of atmospheric soluble metals requires time-consuming efforts and great expense to complete sampling and detection steps due to their low concentrations and technology limitations. This new concept has broad potential in rapid and cost-effective monitoring of atmospheric soluble components to protect human health and can be extended to other applications, such as online in vitro evaluation of airborne particles based on electrochemical techniques.


The one-step design of the presented technology provides a new and efficient concept based on carefully engineered gas-liquid interface and could be extended to measurement of various airborne substances.

Jing Wang
ETH Zürich

Read the Original

This page is a summary of: Aerosol-into-liquid capture and detection of atmospheric soluble metals across the gas–liquid interface using Janus-membrane electrodes, Proceedings of the National Academy of Sciences, February 2023, Proceedings of the National Academy of Sciences, DOI: 10.1073/pnas.2219388120.
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