For instance, i need to know how much water left in ppm after drying ethylacetate with molecular sieve 3 A.
When judiciously used, molecular sieves can be usually expected to limit the water content to a maximum threshold of about 10 ppm for several common solvents. For drying the somewhat reactive ethyl acetate, molecular sieves 4A can be recommended. About drying n-butanol or n-heptane with either molecular sieves 3A or 4A, you may want to check: https://www.researchgate.net/post/Can_3A_molecular_sieves_be_used_to_dry_n-butanol_and_or_Heptane
You may find this reference useful:
Drying of Organic Solvents: Quantitative Evaluation of the Efficiency of Several Desiccants
D. Bradley G. Williams and Michelle Lawton
J. Org. Chem. 2010, 75(24), 8351–8354
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