Viscosity testing measures a fluid’s resistance to flow and is used to characterize how a liquid behaves when force or shear is applied. It helps determine whether a solution flows smoothly or resists movement under processing conditions. [1] Viscosity testing plays a key role in buffer manufacturing, especially in the bioprocessing, diagnostic, and pharmaceutical sectors.
Considerations and Limitations of Filter Integrity | |
|---|---|
Temperature sensitivity | Viscosity is highly temperature dependent. Even small changes can affect measurements, so testing is done under controlled or specified conditions. |
Particulate matter | Suspensions or precipitates can skew results. Testing is ideally performed on clear, homogeneous solutions |
Sample limitations | Extremely high-viscosity samples (>20,000 cP) may require alternate methods. |
Non-Newtonian behavior | Some formulations exhibit shear-thinning or thickening behavior, which may require additional profiling at multiple shear rates. |
Despite these considerations, routine viscosity testing is a fast, reproducible, and high-value checkpoint for ensuring the quality and performance of process-critical reagents.