Sensmet reported its Micro-Discharge Optical Emission Spectroscopy, µDOES, a solution for continuous monitoring of environmental water samples, was proven at a river by a Talc plant in Finland. The solution delivered “greater insights into the factors affecting water quality so what we can continuously improve our environmental performance,” the supplier said.

µDOES is based on atomic emission spectroscopy. An electric spark “is created directly inside the aqueous sample, causing a microscopic volume of the fluid surrounding the spark to be flash-heated to 10,000°C,” Sensmet said. “Molecules in the micro-discharge are dissociated into atoms, which are excited to their respective higher electronic states,” the supplier said. “Upon returning to their ground state, these atoms release their excess energy by emitting light at their characteristic wavelengths.”

The system can monitor elements such as nickel, lithium, sodium, cobalt, manganese, nickel, copper, and more.