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EXP® Stem Trap


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The entire EXP® Stem Trap and reusable holder are only slightly larger than a standard HPLC fitting. Its slim architecture allows it to easily fit into crowded instrument compartments or to connect directly to tightly-spaced injection ports. When tightened by hand, the EXP® Stem Trap seals to 8,700+ psi. All configurations incorporate wrench-flats to enable flawless sealing to 20,000+ psi (1,400+ bar). The unique packed floating stem installs directly into any 10-32 port and automatically adjusts to provide a perfect ZDV connection. The EXP® System enables chemists to quickly remove detergents or salts which can affect the ionization process in MS work. This trapping technique can concentrate the sample directly on-line, allowing for increased recovery of precious sample material compared to off-line techniques. On-line trapping readily lends itself to automation for high-throughput analysis in UHPLC/MS applications.

Key Features

  • Kit includes EXP® Stem Holder with fittings and 3 EXP® Stem Traps
  • Rated to 20,000+ psi (1,400+ bar)
  • Hand-tight and wrench-tight configuration
  • Intended for many repeat uses
  • Auto-adjusting ZDV connection
  • Bed volumes from 0.17 µL to 2.6 µL
  • Low-volume/low-dispersion cartridges
  • Custom packing available

Compatible Holder & Inserts



EXP® & EXP®2 Brochure
A holistic approach to UHPLC

LC Trapping Guide & Products
Trapping Methods and Products

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