Gold Seals for Split/Splitless Inlets

Agilent Gold Inlet Seals

Agilent Gold Inlet Seals with proprietary Ultra Inert (UI) deactivation deliver a leak-free, contamination-resistant connection at the base of the GC injection port. The highly inert surface prevents analyte loss from adsorption or thermal degradation during vaporization, ensuring cleaner chromatograms and consistent response.

A soft gold outer layer forms a reliable mechanical seal without scratching or deforming inlet hardware or adjacent inlet liners—supporting long-term inlet performance across demanding GC workflows.

Agilent Split/Splitless Inlet Seals

Description EA 10/pk 50/pk
Certified gold plated seal kit, includes washer 5188-5367 5190-2209 —
Gold plated seal with cross* 5182-9652 — —
Stainless steel seal 18740-20880 — —
Ultra Inert gold seal & washer 5190-6144 5190-6145 5190-6149

*Use with total flow rates above 200 mL/min

Key Definitions â–¸
Gold Inlet Seal
A precision-machined sealing component at the base of the GC injection port, providing a leak-free barrier between the inlet and column. Agilent’s gold plating ensures an ideal, compliant sealing surface that protects surrounding hardware.
Ultra Inert (UI) Deactivation
A proprietary Agilent surface treatment applied to seals, liners, and other flow-path components to minimize analyte adsorption, prevent decomposition, and maintain highly reproducible chromatographic results.
Mechanical Seal Integrity
The stability and uniformity of the seal formed between inlet components, critical for eliminating air leaks and ensuring consistent carrier-gas flow into the column.
Active Analyte Protection
The prevention of adsorption or decomposition of sensitive compounds during sample vaporization. UI-coated seals maintain an inert environment that supports low-level detection and clean baseline performance.
Inlet Hardware Preservation
The soft gold exterior minimizes wear on inlet weldments, nuts, and liners, reducing long-term maintenance requirements and preventing damage from overtightening.
Frequently Asked Questions â–¸

Why use a gold inlet seal instead of a stainless-steel seal?

Gold seals provide a softer, more compliant sealing surface that improves sealing performance while minimizing analyte adsorption and decomposition.

How often should I replace the gold inlet seal?

Most labs replace inlet seals during routine maintenance—typically every few hundred injections or when leaks or peak-shape issues appear.

Does Ultra Inert deactivation improve performance?

Yes. UI deactivation minimizes analyte interaction with surfaces, improving trace-level sensitivity and reproducibility.

Are Agilent gold inlet seals compatible with my GC?

Yes. Agilent gold seals work with standard Agilent split/splitless, multimode, and other inlet types.