CSC Scientific Blog

A blog about test equipment

CSC Scientific Blog

Moisture Content - Water Activity – Are They the Same Thing?

Posted by Art Gatenby on Mar 6, 2012 4:19:00 PM

The other day, I woke up with a lingering quandary: Are the concepts of

Moisture Content and Water Activity the same thing?

As usual, I’ve decided to take on the task of clarifying the difference.  I hope I pull it off.

From the perspective of someone who supplies instruments that measure moisture content, water activity has not been a primary consideration.  However, I believe that comparison and contrast of these important concepts will be useful.

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Topics: Moisture Sorption Isotherm, Infrared Moisture, Moisture Analysis, Water Activity, Moisture Testing

Is Your Moisture Test Result Really Moisture?

Posted by Art Gatenby on Jan 11, 2010 11:22:00 AM

Most of us think about measuring moisture by...

  1. Drying the material and measure the weight loss 
  2. Using a calibration and electronic instrument 
  3. Using a titration method such as Karl Fischer

When using these processes, we take for granted that the results will be the product's actual moisture.

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Topics: Moisture Oven Test, Infrared Moisture, Moisture Analysis, Karl Fischer Titration, Loss-On-Drying, Moisture Testing

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