Μl

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A microliter (µl) is one millionth of a liter (a factor of 10−6).

Volumes in the 1 µl – 20 µl should be transferred with a P20 micropipette.

Volumes in the 20 µl – 200 µl should be transferred with a P200 micropipette.

Volumes in the 200 µl – 1000 µl should be transferred with a P1000 micropipette.

In general micropipettes work best in the middle of their range (half of their "number", 100 µl for a p200, etc.). Volumes less than 1 µl can be tricky to work with. Use a P10 micropipette instead of a P20 and/or extended pipette tips if you have them.