In case of API potency calculation during product development, which one is preferable whether lod/water by kf?
LOD is better than water content by KF.
Thanks for your reply and May i know the reason for that.
both are important.
LOD= Moisture content+Residual solvents
LOD: water+other residual solvents
K.F: water only
finally you should refer to pharmacopoeial reference
LOD may sufficient since residual solvents have their limits.
In formulation development LOD is preferable .
LOD is preferable
Based on route of synthesis/Input put material of API , API manufacture decide which method to be use for API calculation method.
Example:If API manufacture with solvent , its prefer to use LOD method rather then KF method.
Note : LOD method more prefer than KF method for formulation department.
In my opinion, both are different. It is based on manufacturing process. If the material consumed any other solvent than water or with water, then LOD test will be the part of specifications. If only water is used then, water by KF will be part of specifications. e.g. Moxifloxacin/Ciprofloxacin HCl are prepared by reacting Moxifloxacin/Ciprofloxacin bases with solution of HCl in water. so mostly you will see the water by KF in the monograph of these material.
it depends on the individual monograph of that perticular API. You have to follow whatever mentioned in the pharmaceutical monograph if it is mentioned water then use water content otherwise LOD.
Because, LOD will give the both bound and unboung water content of the substance.
Where as water content by KF, will measure only unbound water content of the substance.