Posted in Physical Chemistry

Lab Photo Gallery

Enjoy these beautiful photos we have collected from our laboratory.


A thermal image of the Kohler closed-cup flashpoint tester in action. Notice the rising heat from the test flame.


We use bearing balls in gauge card holes to simulate sessile water drops on hydrophobic surfaces. This is a ruby bearing ball, and it has been analyzed by the Brugnara Contact Angle plug in for the ImageJ analysis software package.


Here is a little demonstration to show that aluminum metal will effervesce in BOTH pH extremes. The left beaker has 1 M HCl (pH <1) and the right beaker has 0.5 M KOH (pH > 11). Placing them into concentrated cleaning solutions with these pH values will damage the part and will leave a black porous smut behind. Dilute the cleaning solutions as per the instructions from the supplier.


One of the attendees of the Product Quality Cleaning Workshop is about to test the interaction of dichloromethane with clear vacuum silicon grease.

That’s all for now. Click the follow button on the right for notifications of future posts.



Dr. Darren L. Williams (@pchem4all) is an Associate Professor of Physical Chemistry at Sam Houston State University. When he is not blending solvents, he is tinkering with contact angle measurements, FTIR microspectroscopy, etc. . He welcomes your comments and questions by phone (936-294-1529) and by email (williams “at”

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