pKa
Role of pKa and pH Values in HPLC
One of the critical factors influencing the success of an HPLC analysis is the control of pH, which directly impacts the ionization state of analytes. The pKa value of a compound, indicating its acid dissociation constant, plays a pivotal role in this process. pKa: A Key Parameter The pKa value ... Read More
Effects of pKa on the Biological Properties of Ionizable Drugs
Acidic drugs (e.g. aspirin) are generally more highly bound to plasma albumin, giving a lower volume of distribution, i.e. they tend to stay in the plasma rather than distribute to the tissues. Basic drugs (including many CNS-acting agents such as phenothiazines) are theoretically more prone to binding to acid glycoprotein, ... Read More
Importance of pKa Value in Selection of Dissolution Media
There is a question: How pKa value helps in selection of Dissolution Media during Formulation & Analytical Development? For Dissolution, Ionized form of a drug is required to be solubilized & released passively into dissolution medium. While, For Absorption, only unionized form of drug is important to be absorbed passively ... Read More