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CSC Scientific Blog

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: Moisture, Karl Fischer, Karl Fischer Titration, Moisture Analysis, Moisture Testing, Bound Moisture, Free Moisture, Water Activity

Is Sieve Calibration Really The Holy Grail? Part III

Posted by Art Gatenby on Apr 12, 2012 1:12:00 PM

We continue to search for answers to the question "Is Sieve Calibration Really the Holy Grail?" As promised,we present Episode III of the Pequeño saga. You may remember him as a very small (150-micron) particle with many similar-sized family members who are determined to defeat sieve certification.

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Topics: Sieves, Sieving Process, Calibration, Sieve Certification, Sieve Analysis, Particle Size Analysis, Sieve Testing

Is Calibrating a CSC Tensiometer Hard?

Posted by Art Gatenby on Mar 29, 2012 3:55:00 PM

We get repeated queries about calibration of our DuNouy Ring Tensiometers. That makes me think that calibrating procedures to insure accurate surface tension measurment needs some clarification.

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Topics: Surface Tension, duNouy Rings, Tensiometer, Calibration

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 Sieve Calibration Really the Holy Grail? Part II

Posted by Art Gatenby on Feb 7, 2012 4:44:00 PM

 Is Sieve Calibration Really the Holy Grail? Part II: Inside a Sieve Test 

As I start on this second installment of The Adventures of Pequeño: The 150 Micron Particle, I wonder why I get myself into these serial onslaughts. However, a promise is a promise, so I shall press on.

You will recall from Part I: Sieve Certification, our little friend Pequeño, a particle on a determined quest to make it through sieves -- particularly those through which he should be too large to pass. In this scenario, Pequeño along with some of his family and friends -- all small particles about 150 microns in size -- are on their way to a sieve test.

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Topics: ASTM, Pequeño, Calibration, Sieve Calibration, Sieve Certification, Sieves, Particle Size Analysis, Sieve Shakers, Sieve Testing

Which Type of Tensiometer do I Need?

Posted by Art Gatenby on Dec 22, 2011 6:55:00 PM

As followers of these rants know, Fisher Scientific stopped offering its Tensiomat Tensiometer about a year ago. As a tensiometer manufacturer, we at CSC Scientific were very interestedin this and have tried to let the world know that we might be able to help with things such as replacement rings, trade-ins and the like.
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Topics: Surface Tension Measurement, Surface Tension, duNouy Rings, Wilhelmy Plates, Tensiometer, Fisher Tensiomat, Tensiomat Trade-In, Liquid Properties, Digital tensiometer, Automatic Digital Tensiometer, automatic Tensiometer

Who Beats Up Your Bostwick?

Posted by Art Gatenby on Nov 16, 2011 12:11:00 PM

Sometimes we encounter a product that is so simple and rugged that it would be tempting to deem it indestructible. Consider a stainless steel trough with a gate and etched numbers on the bottom. Seems simple and the stainless would make it tough, right? That is not the case, but it has survived nearly unchanged for more than 85 years.

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Topics: Consistency, Bostwick Consistometer, Liquid Properties

Is Sieve Calibration Really the Holy Grail? -- Part I: Certification

Posted by Art Gatenby on Nov 7, 2011 3:13:00 PM

Sieve calibration is the final step in determining whether processes yield suitable end results. In other words:
  • Is your concrete going to be strong enough?
  • Will you chocolates taste right?

  • Will your washing powder flow and dissolve as advertised?

  • Is there dangerous residue in your pill stock?

  • Will the “frack sand” keep the fractures open?

  • Is my salt of the correct grade?

If these are not correct, serious consequences could result (e.g. spoiled product, returned batches, rework or scrap).

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Topics: Calibration, Particle Size Analysis, Sieve Calibration, Sieve Certification, Sieve Testing, Sieves, Sieving Process

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: Moisture Analysis, Moisture Testing, Karl Fischer, Loss-On-Drying, Moisture

Why Calibrate a CSC DuNouy Tensiometer?

Posted by Art Gatenby on Sep 13, 2011 11:14:00 AM

Within the catalog of questions we are asked is a  category related to Calibrating duNouy Ring Tensiometers. The subject matter ranges from how, why and what is proven?

I guess the immediate and wise-assed answers are:

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Topics: Surface Tension Measurement, Surface Tension, duNouy Rings, Tensiometer, Interfacial Tensiometer, Calibration, Fisher Tensiomat, Liquid Properties

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