PDA Technical Glossary
PDA Technical Reports are highly valued membership benefits because they offer expert guidance and opinions on important scientific and regulatory topics and are used as essential references by industry and regulatory authorities around the world. These reports include terms which explain the material and enhance the reader’s understanding.
The database presented here includes the glossary terms from all current technical reports. The database is searchable by keyword, topic, or by technical report. Each definition provided includes a link to the source technical report within the PDA Technical Report Portal.
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Vapor
The gaseous form of materials that are normally liquids or solids at room temperature and pressure. (TR51)
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Vapor Phase Hydrogen Peroxide (VPHP)
A disinfection system in which 35% hydrogen peroxide is changed to a vapor phase and used for bioburden reduction of a chamber or items in a chamber. (TR70)
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Velocity
The average linear rate of fluid flow equal to the volumetric flow rate divided by the cross-sectional area of the flow channel. (TR15)
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Visible Particle Range
Particulate matter sized above the visible particle 70% probability of detection threshold are considered in the visible range, typically >100-150 μm. (TR79)
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Visually Clean
Absence of materials that would adulterate a product when inspected with the eyes. (TR70)