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Syringes and Needles from Trajan

Syringes
Needles

Syringes

Structure of a Syringe

What Type of Syringe?

If the syringe is being used by hand, a manual syringe is selected. If the syringe is being installed in an instrument then select an autosampler syringe to suit that particular instrument. Trajan’s extensive range of autosampler syringes are designed to meet all fit, form and function criterial of a specific autosampler model. They meet dimensional specifications and have accuracy ≥ ±1%.

Syringe Termination

Termination refers to the interface between the syringe barrel and the needle.

Many syringes are supplied and used with needles attached, such as fixed needle (FN) and removable needle (RN). Other terminations are available where the needle is not supplied – Luer Lock (LL), Luer Tip (LT), and threaded terminations.

Fixed Needle

  • Recommended for autosampler use where the probability of needle bending is minimal

Trajan´s termination code: F

Removable Needle

  • Allows for the needle to be changed if damaged or for different applications

Trajan´s termination code: R

Luer Lock

  • Fixed Luer Lock syringes have a Luer fitting that is permanently attached to the barrel
  • Removable needle versions have a Luer fitting that screws onto the barrel with the Luer Tip inserted

Trajan´s termination code: LL

Luer Tip

  • Fixed Luer Lock syringes have a Luer fitting that is permanently attached to the barrel
  • Removable needle versions have a Luer fitting that screws onto the barrel with the Luer Tip inserted

Trajan´s termination code: LT

Thread

  • Screw into a valve or other device, required for some LC autosamplers
  • Various threaded terminations are available

Plunger Selection

Metal Plunger

Features:

  • Stainless steel plunger individually fitted to its own syringe barrel
  • Plunger is not replaceable nor interchangeable

Application:

  • Industry-standard syringe for chromatography applications
  • For use when injection volume is greater than 1 μL

PTFE and PE Tipped Plunger

Features:

  • Plunger is replaceable
  • Easy to remove and clean to extend plunger lifetime
  • Capacities: 10 μL to 100 mL

Application:

  • Liquid and gas samples
  • Headspace applications
  • Ideal for samples with high levels of contaminates
  • PE tips e.g. also for PFAS applications

Metal Plunger for NanoVolume Syringes
(Plunger-In-Needle)

Features:

  • Plunger extends into the needle tip
  • Sample is contained only in the needle i.e. no glass contact
  • Capacities: 0.5 μL, 1 μL and 5 μL

Application:

  • Dispensing very small liquid volumes (less than 1 μL)

Superflex Flexible Plunger

Features:

  • Made from titanium/nickel alloy
  • Virtually indestructible plunger
  • Capacities: 5 μL and 10 μL

Application:

  • Chromatography applications requiring greater plunger durability

Plunger Protection

Features:

  • Extended protection from the top of the syringe back flange to help prevent plunger bending during injection and improve plunger stroke
  • Capacities: 5 μL and 10 μL

Application:

  • General use for both experienced and inexperienced users

Guided Plunger

Features:

  • Extended barrel guides plunger during injection
  • Robust and rugged
  • Capacities: 5 μL and 10 μL

Application:

  • Industrial applications

Needles

Needle Selection

Bevel

Application: Manual GC

 

  • A 20° tip which is typically used for manual injections
  • Designed for optimum septa penetration and prevention of septa coring

Cone

Application: GC autosampler

 

  • Designed to withstand multi-injection requirements and improve septa lifetime when used with a GC autosampler
  • The needle passes through the septa during use and does not cause a slit

Dual Gauge

Application: On-column injection – autosampler

 

  • Narrow gauge at the tip is suitable for large bore on-column injection
  • The wider gauge part of the needle gives increased strength to the needle for autosampler use

Square

Application: LC

 

  • Used for LC valve injection and have a 90° square tip with rounded and polished edges
  • This eliminates damage to the valve’s rotor seal and stator face

Dome

Application: With pre-drilled septa

 

  • The rounded and polished tip make this needle ideal for use with pre-drilled septa

Side Hole

Application: Large Volume Injection (LVI)

 

  • Samples are filled and dispensed through the side hole eliminating septa plugging of the needle
  • Ideal for large volume gas injections and headspace