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Environmental Express™ StepSaver™ Device for Solid-Phase Extraction: Stopcock

Simplifies U.S. EPA Method 1664

Manufacturer:  Environmental Express™ G1057

Catalog No. 09-735-131

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Requires : Manifold, SPE extraction disk and Na2SO4 drying cartridge must be purchased separately.



  • Positions the collection vessel outside of the filter flask or manifold and utilizes a vacuum bridge to connect the vacuum source
  • Luer adapter, located in the solvent collection arm, permits the use of an inline Na2SO4 drying cartridge
  • Allows the collection of the solvent with eluted oil or grease directly into a preweighed collection flask, thus eliminating the disassembly or assembly of glassware
  • Already dried with the Na2SO4, the eluent can be directly evaporated to obtain the weight of the extracted oil or grease
  • Two-way, 120° PTFE-resin stopcock prevents accidental sample loss; attaches to a filter manifold or filtration flask through the standard taper 40/35 ground glass joint on the bottom of the apparatus
  • Designed for use with 47mm solid-phase extraction disks
  • Manufactured of borosilicate glass with a stainless-steel filter screen



Anodized Aluminum
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