Question

state the principle of Differential adsorption​

Answer 1

Answer:

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Explanation:

Adsorption Chromatography is based on the principle that some solid substances, which are known as adsorbent, have the power to hold molecules at their surface. This holding force is due to weak, non-ionic attractive forces of the van der Waals' and hydrogen bonding, which only occur at specific adsorption beds.

Answer 2

Explanation:

The principle of DIAL is that two different laser wavelengths (commonly called the online and offline wavelengths) are selected so that one of the wavelengths is absorbed by the gas molecules of interest while the other wavelength is not.

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