Syringe Transfer
Fluids may also be transferred via syringes; at all times a slight over-pressure of inert gas is maintained to prevent the ingress of moisture or air, as well as providing refill volume. This method is also applicable for transferring fluids from bottles similar to the Aldrich Sure/Seal-type.
Prior to withdrawing the needle for subsequent transfer, the needle bore is usually filled with inert gas to serve as a buffer from the atmosphere.
Read more about this topic: Cannula Transfer
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—Max Weber (1864–1920)