For Transfer Pipette Uses,It is very difficult to many stdents,teacher and so all,there is a ways from network to use your Transfer Serological Pipettes accurately. Here's how to do it. It takes a little practice. Press the rubber bulb to the top of the pipet, but don't stick the pipet into the bulb so tight that it won't come off easily. Squeeze the bulb and immerse just the tip of the pipet into the liquid. Release the bulb until you have drawn liquid *past* the mark, but be careful not to draw liquid into the bulb.Quickly pull the bulb off the pipet and place your index finger (or thumb) over the top of the pipet to keep the liquid from running out. Touch the tip of the pipet to the side of the container or another clean container (not the one you're really going to deliver to finally, though). Holding the pipet vertical, roll your finger off the top a tiny bit and allow liquid to leak out until the bottom of the curved liquid surface (the meniscus) is lined up with the mark. (This is where the practice comes in!) Now, touch the tip of the pipet to the side of the container you're going to deliver to, remove your finger, and allow the pipet to drain.
Now, there's a bit of a question: look at the top of your pipet. If it is marked with the letters TD, then you have just delivered the proper volume. The TD means that the pipet is calibrated "to deliver" that volume, and you *do not* blow out the last drop that remains in the pipet tip.
If the pipet is marked TC, which stands for "to contain" then the pipet is calibrated to contain that volume, and you *should* blow out the last drop, using the bulb.
It is just usually need much patience,now there are many kinds of Plastic Pipettes,they all can help you get more accurately.
