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How and why do you measure the pH of your silica gels?

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This pH test involves suspending the silica gel in pure water (5 % w/w).

The pH can increase the retention of some ionizable compounds. However, some products can become hydrolyzed or rearranged when in contact with acidic silica. A neutral pH, with a range between 6.5 and 7.5, is the most important factor in determining the reliability and inert behavior of the silica.

 

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