Your lab partner hands you a P 200 Pitman set as shown in th

Your lab partner hands you a P 200 Pitman set as shown in the diagram at right. What volume is it set for? is this the proper for this volume? Why or why not?

Solution

The maximum volume of pipette is 200 ulit. While handling, the volume decrease, if the pipette volume decider wheel rotates towards us from 200, 190, 180, 170 etc. If it ture away from us, value increased and reached 200. Even after reach the max volume 200, again rotate away from us, then it reached 210 which is not good.

In above figure, the value is above the maximum value I.e 210 u lit. It was wrong and improper. To set this 200, the volume set wheel rotate towards us.