Detection of Ammonia in Liquids Using Millimeter Wave Spectroscopy

Abstract EN

Detection of ammonia plays a vital role for counter-bioterrorism applications.

Using millimeter wave absorption measurements, ammonia dissolved in water solution is analyzed and compared to water-only solution.

The inversion of ammonia molecule results in split rotational spectral lines and transitions of these lines can be detected.

Two-port measurements were carried out with vector network analyzer and measurements revealed that ammonia presence can be identified, especially between 30–35 GHz.