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Solutions for Dissolved Gas Analysis and Off-gas Analysis in Electrochemistry

The Hiden HPR-40 DEMS is a bench top or mobile cart mounted module for analysis of dissolved species in electrochemistry. The system is modular and adaptable. The system includes two differential electrochemical mass spectrometry ‘DEMS’ cell inlets, designed for material/ catalysis studies, cell type A, and electrochemical reaction studies, cell type B.


Differential Electrochemical Mass Spectrometry (DEMS) is an analytical technique that combines electrochemical half-cell experimentation with mass spectrometry. It allows in situ mass resolved determination of gaseous or volatile electrochemical reactants, reaction intermediates and products in real time. Hiden Analytical offer a range of DEMS cells with electrolyte/nanoporous sampling interface to the Hiden HPR-40 DSA Mass Spectrometer.

For applications where online electrochemical MS, OEMS, from an existing cell or reactor is required, a range of standard inlet options is available offering both evolved off-gas and dissolved species analysis solutions. Electrochemical cells that can be interfaced to the Hiden HPR-40 DEMS system include selected models from: Redoxme AB, and EL-Cell®


Further Reading

UIC University of Illinois at Chicago | DEMS

Researchers prove surprising chemistry inside a potential breakthrough battery

Novel DEMS Cell | DEMS

A novel differential electrochemical mass spectrometry (DEMS) cell for integration with the Hiden Analytical HPR-40 DSA membrane inlet mass spectrometer systems. The new cell, developed by Ezra L. Clark and Prof. Alexis T. Bell of The University of California, Berkeley Lab, coupled with Hiden’s differentially pumped mass spectrometer system provides for in-situ mass resolved determination of gaseous or volatile electrochemical reaction intermediates and products in real-time.

The system is supplied with QGA 2 and MASsoft Professional Edition software.

QGA 2 software is an application specific software package for quantitative gas and vapour analysis providing real-time continuous analysis of up to 32 species with species concentration measured in the range 0.1 ppm to 100 %.

This Windows 10 and Windows 11 compatible software allows control of the instrument via USB 2.0, RS232 or Ethernet. Provides comprehensive I/O for data output and for reading data from external devices for integration and display with mass spectrometer data.