Left over particles in the basket apparatus

Settling of particles at the bottom of the vessel in case of paddle, or left over in case of basket, is reflection of poor product/medium interaction resulting in inefficient or slower dissolution. These are artefacts of the paddle and basket apparatuses. Therefore, one should expect slower dissolution rate, reduced extent (e.g. 80%), and highly variable results using these apparatuses. Thus, this observation appears expected and normal. Hope this is helpful.

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