Monitoring Trace H2O In Liquid Product On Process – Where Titrations End And IR Begins

Source : Applied Analytics


Karl Fischer Titrations have been the default technique for measuring trace amounts of moisture in liquid samples. While remaining specific to water, flexible for a wide range of applications, and well-studied, accuracy, however, is one philosophical and subjective question that remains to be addressed. Operating a lab with KF analyzers, users can quickly find themselves asking the following questions:

  • How do I know that I am gathering representative samples consistently?
  • Are the surroundings impacting my measurement?: (i.e. low ppm, hygroscopic samples, moisture contamination).
  • Can I isolate operator error, maintain analyzer stability, and use just enough reagent to have the precise data that I need?
  • How many samples can I take in one day? What is the best response time that I can get?
  • Do I have an alternative to perform this measurement on process?


Capitalizing on the large absorbance bands that give water its unique spectral fingerprint, AAI offers an online IR (infrared) based solution for a wide range of applications with the following advantages:

  • Fully automated measurement. No operators necessary.
  • Instant response with streaming moisture in liquid data ranging from % concentration levels to ppm.
  • No consumables required for reaction.
  • One time calibration with a Zero-offset technique to provide flexibility when choosing a proper zeroing medium.

The MCP-200 is the dedicated analyzer for the job. It utilizes NDIR (non-dispersive infrared) technology with no moving parts to perform the measurement. Please click here if you would like to learn more about the measurement. The following are examples of applications that the MCP-200 can perform for trace moisture in liquid:

  • PVC Manufacture: Trace moisture in VCM (vinyl chloride monomer)
  • Extraction processes: Solvency power of NMP, DMF, Phenol, Furfural
  • Fiber spinning efficiency
  • Moisture in hydrocarbons
  • Pharmaceuticals
  • Semiconductors and specialty metals
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