Dear Loveneesh,

Some leaching may have occurred, and this is not going to be reflected in a reaction. Actually, I think that always, even in a minimal way, leaching occurs, although this may not significantly influence the catalytic behavior of the system. If you have to prove the absence of leaching, my recommendation is that you do an analysis after filtration.

Dear Loveneesh,

Some leaching may have occurred, and this is not going to be reflected in a reaction. Actually, I think that always, even in a minimal way, leaching occurs, although this may not significantly influence the catalytic behavior of the system. If you have to prove the absence of leaching, my recommendation is that you do an analysis after filtration.

Dear Loveneesh Kumar thanks for sharing this very interesting technical question with the RG community. According to the relevant literature reference cited below, a "hot filtration test alone cannot prove that the reaction occurs heterogeneously":

Synthesis, catalytic activity, and leaching studies of a heterogeneous Pd-catalyst including an immobilized bis(oxazoline) ligand

Article Synthesis, catalytic activity, and leaching studies of a het...

Fortunately this article has been posted by the authors as public full text on RG, so that you can freely download it as pdf file.

It might also be worth a try to check the answers given to the following closely related questions which have been asked earlier on RG:

How might I measure the leaching of heterogeneous catalyst using simple techniques?

https://www.researchgate.net/post/How-might-I-measure-the-leaching-of-heterogeneous-catalyst-using-simple-techniques

(4 answers)

and

What is the best technique to test the heterogeneity of a reaction in catalysis?

https://www.researchgate.net/post/What_is_the_best_technique_to_test_the_heterogeneity_of_a_reaction_in_catalysis

(58 answers)

Good luck with your work and please stay safe and healthy!