Mobile Phase Filter, 20 um, white, polyethylene, 1/16 inch connector. EPP-Porous Products brand. Bulk Price.
Mobile‑phase inlet filters, also known as solvent pickup filters, are used to prevent particulates from entering HPLC, UHPLC, and LC‑MS systems at the solvent reservoir. These filters attach to or are integrated with solvent pickup tubing and provide continuous upstream filtration to protect pumps, valves, and columns from particulate contamination.
This category includes inlet filters manufactured from sintered stainless steel or porous polyethylene, designed for long‑term use in a wide range of solvent chemistries.
Purpose & Function
Mobile‑phase inlet filters serve as the first line of defense in a chromatography system by:
Preventing particulate uptake from solvent bottles
Reducing contamination‑related pressure fluctuations
Protecting pump seals, check valves, and columns
Because they operate before solvent enters the pump, proper inlet filtration supports system longevity and reproducible chromatographic performance.
Materials & Design Options
This category includes multiple inlet filter configurations to support different workflows:
Porous polyethylene inlet filters Typically white in color, allowing visible monitoring of particulate buildup, making it easy to identify when cleaning or replacement is required.
Sintered stainless‑steel inlet filters Passivated for chemical resistance and durability, suitable for aggressive solvents and long‑term use.
Connection & Use Configurations
Several inlet filter designs are available, including:
Finger‑tight pickup filters compatible with 1/16″ or 1/8″ tubing
Configurations suitable for gravity‑fed filtration, positive pressure, or vacuum applications
Connector styles that allow tubing to be slipped over adapters for flexible use in solvent filtration or sparging
Some configurations are intended strictly for filtration, while others may be used in sparging or degassing workflows, depending on design.
Performance Benefits
Continuous particulate removal at the solvent source
Reduced pump and valve wear
Extended column lifespan
Improved reliability and consistency of chromatographic results
Incorporating mobile‑phase inlet filters into solvent bottles is a simple, cost‑effective way to enhance overall system performance.
Terminology Note
These products are sometimes informally referred to as “filter stones” within laboratories. However, the correct and widely accepted terms are mobile‑phase inlet filters or solvent pickup filters, which more accurately describe their function.
