Question

For a step in a lab protocol, you need to pipette 19 uL of a liquid into a tube. Which piece of equipment would do this most accurately?
1) 2 uL - 20 uL pipette
2) 10 uL - 100 uL pipette
3) 0.1 uL - 10 uL pipette
4) 20 uL - 200 uL pipette