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Can You Do a Fast Moisture Test?

Posted by Art Gatenby on Jan 24, 2014 9:51:00 AM

Can you do a fast moisture test?  The answer is, “maybe”.

The direct methods of Loss on Drying and Karl Fischer have the benefit that between them they can get a good moisture content result on almost any product or material.

But these tests usually take several minutes.

When you need the moisture content in a truck load of grain while the load is being dumped, or when you need to check several hundred bags of coffee at an auction, or when you need to get a moisture gradient in a pile of corn, a faster test is crucial.

 

Can you do it?

 

The short answer is, “yes”.  There are, however certain caveats to this answer.

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Topics: ask art, moisture testing, moisture content analysis, moisture determination, moisture test

What Can I Use To Get The Moisture Content In My Product?

Posted by Art Gatenby on Oct 3, 2013 5:36:00 PM

A question we get a lot is:

“How do I determine the moisture in my product?

Of course, the answer is often “it depends”, and the method does depend on the chemical and physical composition of the product. There are several methods used to determine moisture content: Loss-on-Drying (also known as Weight Loss), Karl Fischer, NIR, and Radio Frequency. 

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Topics: ask art, moisture analysis, moisture content determination, Moisture content, moisture measurement, Karl Fischer, moisture analyzers, CSC Digital Moisture Balance, loss-on-drying, Moisture, moisture content analysis, moisture content test, moisture determination

Moisture Content and Water Activity - What Are They?

Posted by Art Gatenby on May 30, 2013 1:23:00 PM

Many accessing our web site ask questions such as:

  • “How does water content affect water activity?”

  • "How is water activity different from water content?”

  • ”Can I convert from moisture to water activity?”

I previously commented on water activity and now hope to clarify the differences between water activity and moisture content. Given that both of these measurements deal with water connected to a material, we must first understand of water content in a product.

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Topics: Moisture Sorption Isotherm, moisture content determination, Moisture content, water activity, moisture content test, moisture determination

Do I Need A Karl Fischer Oven?

Posted by Art Gatenby on Jan 23, 2013 6:20:00 PM

As you know the Karl Fischer Method of moisture analysis has a reputation of being water specific. The method works through the use of a special Karl Fischer Reagent.

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Topics: Karl Fischer reagent, coulometric karl fischer, volumetric karl fischer, moisture analysis, Karl Fischer Oven, Karl Fischer, Karl Fischer Titration, moisture determination

Thought Your Moisture Measurement Challenge Was Complicated?

Posted by Art Gatenby on Dec 14, 2012 3:51:00 PM

As I've said many times, measuring Moisture Content, Surface Tension and Particle Size often confounds me. 

Moisture measurements are nothing compared to the measurements needed to check out the Universe. Came across this video and thought you'd fnd it interesting and fun. 

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Topics: sieve shakers, test sieve, particle size distribution, Surface Tension Measurement, surface tension, surface tension tests, moisture analysis, moisture content determination, Moisture content, moisture testing, moisture measurement, particle size analysis, sieve test, sieve testing, sieves, sieving, test sieves, sieve analysis, test equipment, moisture content test, moisture determination, moisture test

Coulometric Or Volumetric Karl Fischer -- Which Should I Use?

Posted by Art Gatenby on Jul 3, 2012 12:27:00 PM

As usual when we pose a question,like:

Should you use Coulometric or Volumetric Karl Fischer to measure moisture in your product?

We often get a the reaction, “So Who Cares?” We'll try to answer both questions.

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Topics: Karl Fischer reagent, coulometric karl fischer, volumetric karl fischer, moisture testing, Karl Fischer, Karl Fischer Titration, moisture determination

What is Moisture Content?

Posted by Art Gatenby on May 29, 2012 3:24:00 PM

Last week, as I was reflecting on a recent moisture content problem, I recalled our series “Loss-on Drying and Other Moisture Mysteries.” In that series I examined moisture chemistry in products. However, I did little to define moisture content.

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Topics: bound moisture, free moisture, drying, moisture analysis, moisture content determination, Moisture content, water activity, moisture testing, moisture measurement, Karl Fischer, Karl Fischer Titration, moisture analyzers, Moisture, moisture content test, moisture determination, moisture test

Why Do I Get Inconsistent Moisture Test Results?

Posted by Art Gatenby on Oct 14, 2011 2:32:00 PM

Why are my Moisture Test results inconsistent?” 

That is an issue for many of you who test for moisture. We discussed the complexities and multiplicity of issues involved with moisture content determination in our “Loss-on Drying Moisture Analysis and other Moisture Mysteries” series.

In addition to intrinsic properties of test samples that may adversely affect moisture testing systems, automatic equipment parameter set-up, operator oversights and sample handling contribute to seemingly intractable moisture test result inaccuracies.

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Topics: test results, moisture analysis, moisture testing, moisture measurement, Karl Fischer, loss-on-drying, Moisture, test equipment, moisture determination, moisture test

Karl Fischer Moisture – Answers to Questions We Get Asked

Posted by Art Gatenby on Jul 29, 2011 4:08:00 PM

When People are first introduced to the Karl Fischer Moisture Determination Method, eyes glaze over and we can perceive a mental “Why did I ask?

If you have any history with moisture analysis, you will have found, that for some applications, the Karl Fischer Titration Method is the best and sometimes the only way to get an accurate moisture measurement.

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Topics: moisture analysis, moisture measurement, Karl Fischer, Karl Fischer Titration, moisture determination

Loss-On-Drying Moisture Analysis and Other Moisture Mysteries Part IV: Water Activity

Posted by Art Gatenby on Mar 31, 2011 3:39:00 PM

Loss-On-Drying moisture analysis seemed like a simple process until, in a state of naïve bliss, I promised to look at evaporation, vapor pressure and bound water. While I was otherwise occupied with these realities, I offered to enter the world of witchcraft and folklore; water activity.

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Topics: bound moisture, Moisture Sorption Isotherm, moisture analysis, water activity, Laboratory Equipment, loss-on-drying, moisture determination

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