Syringe
Syringe Selection Guide If a syringe is being used by hand, a manual syringe should be selected. If a syringe is installed in an AOC autosampler, then choose the appropriate syringe and volume to suit your instrument and application. Syringe Style
Fixed Needle
Removable Needle
• Better option for experienced users or for applications requiring trace sample levels • Recommended for use with an autosampler because the probability of needle bending is minimal • Minimal sample carryover
• Better option for inexperienced users • Reduce cost if used in precipitation of salts or in situations in which it may bend easily (such as thick septum ) Available for many methods by changing needles
Gas Tight
• For Luer Lock needles and ttings • Speci cally designed to install and secure Luer Lock needles easily
Needle Tip Style
Bevel: Manual Injection
Cone: Autosampler
The standard general-purpose needle tip style supplied with many syringes is a 20 ° bevel tip. It is the preferred option for manual injection when piercing the septum in exactly the same place is dif cult. The bevel tip is designe d for optimum septum penetra- tion and prevention of septum coring.
The cone-shaped needle tip is specially developed to withstand multi- injection demands and improve septum lifetime when used with an autosampler. The cone design effectively “parts” the sep- tum during piercing instead of cutting it, as would a bevel needle.
Side Hole Dome
Samples are lled and dispensed through the side hole , eliminat- ing septum plugging of the needle. Ideal for large-volume gas injections. The solid domed tip minimizes septum damage.
Plunger Style
PTFE Tipped Plunger
• PTFE Tip enables gastight analysis • Suitable for both liquid and gas samples
• Ideal for analysis of highly viscous liquid because it reduces the possibility of the plunger sticking due to micro particles (samples should have no effects with PTFE) • Plunger is replaceable
Pg C-58
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