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A syringe is basically a medical device that is used
to inject or withdraw fluid into or from the body. A medical syringe comprises
a needle attached to a resonating vessel that is fitted with a sliding plunger.
The sliding movement of the plunger injects fluid; skyward movement withdraws
fluid. Medical syringes are made up of three main materials: glass, plastic,
and stainless steel. For the designing of any experiment or for setting up the
syringe pump, it is vital to choose the right syringe material type for your
application.
Plastic Syringes
Plastic syringes have become rampant in recent
years. They are affordable and sturdier and are typically free of any heavy
metals and tungsten, and have little to no silicone. Still, plastic ones have a
lower gas barrier in contrast to the glass syringes and thus, may not be ideal
if you are working with vented samples and/or samples that are very sensitive
to oxygen. Plastic syringes are easily available though in a variety of
sizes.
Stainless Steel Syringes
If you are employing viscous samples and high flow
rates, you are likely to come across high syringe pressures. In such cases, you
may need a stainless-steel syringe. Stainless steel syringes are highly
durable, have fewer volume errors, and are even chemical-resistant. Yet, it may
be harder for these syringes to load than glass or plastic syringes because it
is hard to visually detect air bubbles in them. Stainless steel syringes are
usually only used in high-pressure applications.
Glass Syringes
Glass syringes provided by the China glass syringe exporter are the most commonly used syringes used
in syringe pump applications. They are easily available in a variety of sizes,
even for the microliter volumes, helping experiments with extremely small
injection volumes. They usually have the least volume errors (typically ~1%)
and are thus perfect for high precision work. Moreover, glass syringes have a
high gas barrier, which is apt for oxygen-sensitive applications.
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