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Trajan CB Emitters

 

Trajan CB Emitters. No clogs. Just uptime.

Stop losing time to clogged emitters

Emitter clogs don’t just interrupt LC-MS runs—they create a serious challenge, causing hours of downtime, reducing throughput, and delaying results. Every rerun consumes precious samples, wastes reagents and disrupts workflows. In proteomics, that’s time and resources no lab can afford to lose.

Introducing the Trajan CB Emitter

To address our customer’s challenges, we developed the Trajan CB Emitter. Unlike traditional pulled emitters with a tapered internal diameter, Trajan CB Emitters are engineered with a constant bore design that maintains a uniform ID right to the tip - reducing clog risk, minimizing downtime and reruns, and keeping workflows uninterrupted.

Constant bore explained

best-compatible-emitters-high-throughput-proteomics
Keep workflows moving run after run

Consistent performance for demanding workflows

Trajan CB Emitters don’t just reduce clogging – they’re precision-engineered in-house to deliver the sensitivity, accuracy and consistency essential for high-performance proteomics. Every detail is designed to keep workflows moving and results reliable.

Explore key benefits

Coating options

Choosing the Trajan CB Emitter with the right coating ensures optimal spray stability and compatibility with your LC-MS setup. Here’s what each option offers:
Uncoated

Trajan CB Emitter UC graphic

 


For source configurations where voltage is applied to the liquid junction. This is the simplest configuration, suitable for standard workflows where electrical contact at the junction is sufficient.

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Gold tip coated

Trajan CB Emitter GTC graphic

 Trajan CB Emitter GTC

For source configurations where voltage is applied to the emitter body, this option enhances spray stability and improves efficiency for non FAIMS applications.

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Gold distal coated

Trajan CB Emitter GDC graphic


Trajan CB Emitter GDC

Features a non-conductive tip that eliminates arcing in FAIMS systems. This design allows closer positioning to the FAIMS interface for a more stable spray and improved ion transmission.

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Emitter - Fusion3-Test

Constant bore explained

A constant bore emitter maintains a uniform internal diameter right to the tip, eliminating abrupt constrictions that can disrupt fluid dynamics. This streamlined design promotes smooth, laminar flow, minimizes turbulence, and reduces sites for particle buildup — significantly lowering the risk of clogging.

The outcome is fewer interruptions, fewer reruns, and consistently higher throughput for demanding workflows.

Constant bore explained

A constant bore emitter maintains a uniform internal diameter right to the tip, eliminating abrupt constrictions that can disrupt fluid dynamics. This streamlined design promotes smooth, laminar flow, minimizes turbulence, and reduces sites for particle buildup — significantly lowering the risk of clogging.

The outcome is fewer interruptions, fewer reruns, and consistently higher throughput for demanding workflows.

 

"We have performed hundreds of runs using Trajan CB Emitters, and the spray quality has proven to be very robust and reproducible. When using other emitters, we found that despite sample cleaning processes, certain samples or matrices interfered with the spray - and in extreme cases, caused blockages. These issues result in significant LC-MS downtime and delays in project deliverables."

 

Gagan bw copy

  

Dr. Gagan Deep Jhingan
VProteomics, India

“Because these emitters have a completely straight internal bore with no taper, they very rarely clog if you’re careful with them. In fact, it’s almost impossible to block them.”

 

 
dr-matt-padula-director-proteomics

 


Dr. Matt Padula
Director, Proteomics and Metabolomics Platform, University of Technology Sydney, Australia

Explore the key benefits that matter most

Keep your runs moving

Keep your runs moving

Reduce downtime, reruns and rework with a constant bore, clog-resistant design.

Maximize sensitivity and proteome coverage

Maximize sensitivity and proteome coverage

Thanks to precision-cleaved, zero dead volume (ZDV)-compatible ends and a tip geometry optimized for superior spray efficiency.

Ensure accuracy and precision

Ensure accuracy and precision

With an optimized tip geometry that delivers stable, efficient spray performance.

Deliver consistent performance

Deliver consistent performance

Tight tolerances minimize variability between emitters, reducing the need for reruns after emitter replacements.

Run any sample

Run any sample

With chemically inert fused silica that supports even phosphorylated proteins.

Precision engineered for consistent analytical performance

Commitment to quality

 Trajan CB Emitters undergo comprehensive quality testing to ensure every emitter delivers a high level of analytical performance.

Every single emitter passes rigorous manufacturing control processes and high-resolution microscopic inspection, with each pack supplied with a Certificate of Conformance. 

Make the right choice

Find the right fit for your LC-MS setup with our Emitter Selection Tool.

Quickly filter to identify the recommended emitters for your source configuration, sample types and workflow.

Need help? Talk to an expert

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Quick Guide
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Ready to start your clog-free journey?

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FAQs

What materials are Trajan CB Emitters made from?

Trajan CB Emitters are made from pure synthetic fused silica with a durable polyimide coating.
Are there different metallized coatings available?

Trajan CB Emitters are available either uncoated, or with gold coating (tip or distal coated).  
What is the emitter coated with, and what advantages are offered when using an emitter with tip coating versus distal coating?

Gold coating is applied to emitters for source configurations where voltage is applied directly to the emitter.

Tip coated emitters have gold coating all the way to the tip.

Distal coated emitters are gold coated on the body only, with uncoated non-conductive tips, eliminating arcing associated when using stainless steel emitters.

Uncoated emitters do not have any metal coating applied.
What voltage is typically applied to Trajan CB Emitters? Trajan CB Emitters operate between 1.6 kV to 2.5 kV for typical proteomic workflows; however voltage depends on solvent composition and distance to the MS inlet. We recommend operating at a few hundred volts higher than the onset voltage (minimum voltage to initiate the spray).  
What flow rates are typically set for Trajan CB Emitters? Trajan CB Emitters are typically operated at 250-500 nL/min for optimal spray stability and sensitivity.  
What internal diameter (ID) is recommended? We recommend a Trajan CB emitter with 10 µm internal diameter (ID) for lower flow rate (<200 nL/min) and for clean samples that require high sensitivity. We recommend 20 µm ID for higher flow rate (>200 nL/min) and for more complex samples, as well as routine experiments that prioritize robustness.  
How long do Trajan CB Emitters typically last? Emitter longevity depends on sample cleanliness, solvent composition, operating voltage and flow rate. If a drop in performance is observed, please refer to the troubleshooting section in our quick guide.  
Are Trajan CB Emitters reusable? Trajan CB Emitters are reusable if they are handled carefully and cleaned properly. However, it's our recommendation to dispose of the emitter to avoid the risk of cross contamination and performance variability.  
Why does my emitter spray become unstable?

Common causes of spray instability include:

  • • Clogged or partially blocked tip
  • • Air bubble in LC pathway
  • • Incorrect or not optimized spray voltage
  • • Too high or too low flow rate

You can refer to our Emitter Selection Tool or contact us for help selecting suitable emitters for your application.

For assistance with installed emitters, please refer to the troubleshooting section in our quick guide or contact technical support for further assistance.

Which emitters fit with which instrument and ion source? Please refer to our Emitter Selection Tool or contact us for help selecting suitable emitters.
What sizes are available?

Trajan CB Emitters have a 360 µm outer diameter (OD), with either 10 µm or 20 µm internal diameter (ID). 40 mm, 50 mm, and 62.5 mm lengths are available to suit a variety of instrument configurations.

 Please refer to our Emitter Selection Tool or contact us for help selecting suitable emitters.  
Do you have emitters with outer diameters (ODs) other than 360 µm, such as 200 µm OD? No. All Trajan CB Emitters have a 360 µm outer diameter (OD).
Is it possible to test your emitters first for performance, before ordering a pack? Yes. Please contact us to request a free sample pack.
Where can I buy Trajan emitters? Please contact us for a quote at info@trajanscimed.com.
Is it possible to customize the emitter? Yes. To create custom emitters perfect for your unique workflows and applications, please contact us at info@trajanscimed.com.
Do you have integrated column/emitters? No. Trajan does not currently offer integrated column/emitters.
Do you have stainless steel emitters? No. Trajan does not currently offer stainless steel emitters.
Do you have pulled emitters? No. All Trajan CB Emitters feature a constant bore design that maintains a uniform internal diameter to the tip, reducing the risk of clogging.
© 2026 Trajan Scientific and Medical. Trajan Scientific Australia Pty Ltd.