How to Cut HPLC Tubing Properly

To cut HPLC tubing properly, make a clean, square, burr-free cut that allows the tubing to seat fully in the fitting and create a low-dead-volume connection. Uneven or jagged cuts can cause leaks, add dead volume, broaden peaks, and reduce chromatographic reproducibility.

For PEEK tubing, use a guillotine-style polymer tubing cutter. For stainless steel tubing, use a dedicated rotating cutter such as the Terry Tool. When consistency and convenience matter most, pre-cut tubing is often the best option because it reduces cutting errors and contamination risk.

Clean Tubing Cuts for Better HPLC Connections

Reduce dead volume, prevent leaks, and improve chromatography by cutting PEEK and stainless steel tubing correctly

HPLC Accessories

High-performance liquid chromatography (HPLC) is one of the most effective tools in analytical chemistry, but precise results depend on more than just the instrument itself. Small details such as how tubing is cut and connected can directly affect system performance. Clean tubing preparation helps reduce leaks, minimize dead volume, and maintain consistent chromatographic behavior.

Sharp Cuts for Peak Performance

Proper tubing connections are essential for accurate and reproducible chromatography. Jagged, angled, or uneven tubing edges can create unwanted dead volume, which may lead to leaks, broader peaks, and reduced data reliability. Whether using PEEK or stainless steel HPLC tubing, the goal is the same: produce a clean, perpendicular cut that seats properly in the fitting.

  • PEEK Tubing: Use a guillotine-style polymer tubing cutter to produce precise, square cuts that reduce dead volume and help prevent leaks.
  • Stainless Steel Tubing: Use a dedicated cutter such as the Terry Tool, which rotates around the tubing and cuts cleanly without deforming it. This allows nuts and ferrules to slide on easily without extra deburring or reaming.

Pre-Cut for Precision and Convenience

Although tubing can be cut in the lab, pre-cut stainless steel tubing often offers the most consistent performance. Factory-prepared tubing helps reduce the variability that can occur with manual cutting and provides more uniform connection quality.

Cutaways of cut tubing

For many chromatography laboratories, pre-cut stainless steel tubing offers several advantages:

  • Uniform performance: Factory-cut lengths and burr-free edges help minimize dead volume and improve consistency
  • Reduced contamination: Avoids introducing metal shavings or debris during manual cutting
  • Time efficiency: Reduces tubing preparation time and keeps focus on analysis

Chrom Tech offers multiple tubing formats to support different workflows:

SS
Stainless steel tubing
Pre-cut or Custom
Length 316 SS Tubing
PEEK
PEEK tubing
Bio-Compatible,
Metal-Free Alternative
PEEKsil
PEEKsil tubing
PEEK-Lined Fused
Silica Tubing
Capillaries
Capillaries
Flexible Capillaries
for Agilent Systems

MarvelXACT: Consistent, Click-Tight Connections

If overtightening, under-tightening, or leaks are recurring concerns, MarvelXACT HPLC connections offer a simplified alternative. These fittings come pre-assembled with PEEK or stainless steel tubing and use an audible “click” to indicate the correct torque.

  • Helps prevent overtightening with an audible click at the proper torque
  • Maintains zero-dead-volume connections to reduce carryover and peak distortion
  • Rated fingertight to 19,000 psi and reusable for 100+ connections

Why Proper Tubing Cutting Matters

HPLC tubing may appear simple, but connection quality has a direct effect on overall system performance. Clean cuts and well-seated fittings help preserve pressure integrity, reduce band broadening, and support reliable chromatography.

By using the correct cutting tools, selecting pre-cut tubing when appropriate, and considering connection systems such as MarvelXACT, chromatographers can build cleaner and more reproducible flow paths that support sharper peaks and fewer troubleshooting issues.

Worried about leaks and overtightening? Shop MarvelXACT

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Key Definitions ▶
Dead Volume
Extra internal space at a tubing connection that can broaden peaks, reduce efficiency, and compromise chromatographic reproducibility.
PEEK Tubing
A polymer-based, metal-free tubing option commonly used in HPLC for bio-compatible and corrosion-resistant flow paths.
Stainless Steel HPLC Tubing
High-pressure tubing used in HPLC systems where strong mechanical durability and pressure tolerance are required.
Perpendicular Cut
A square cut made at a 90-degree angle to the tubing length, which helps create a tight, low-dead-volume connection.
MarvelXACT Connection
A pre-assembled HPLC connection system designed to provide repeatable, zero-dead-volume fittings with audible click-tight torque control.
Frequently Asked Questions ▶
What’s the best way to cut PEEK and stainless steel HPLC tubing?
Use a guillotine-style cutter for PEEK tubing and a dedicated rotating cutter such as the Terry Tool for stainless steel tubing. Both help produce square, burr-free cuts that minimize dead volume and reduce leak risk.
Why choose pre-cut HPLC tubing?
Pre-cut tubing helps eliminate cutting errors, improves consistency, reduces contamination risk, and saves preparation time, which makes it especially useful in precision HPLC workflows.
How does MarvelXACT simplify HPLC connections?
MarvelXACT fittings come pre-assembled and provide an audible click at the correct torque, helping prevent overtightening or undertightening while maintaining low-dead-volume connections up to 19,000 psi.