This preview shows page 1. Sign up to view the full content.
Unformatted text preview: s operation two more
times. Finally, fill the buret above the zero mark and drain the excess out the tip
until the meniscus is within the calibrated portion of the buret. Be sure that no air bubbles are trapped in the tip. Do not attempt to bring the meniscus to 0.00. This
method is both time consuming and unwise, since the 0.00 line may not be in
precisely the right place.
Pipets: Students often experience some initial difficulty in using a pipet. The
following instructions, the illustrations in Figure 6 and some hands-on practice
using deionized water should help you to become proficient fairly quickly. In
what follows, we assume that the pipet has been pre-rinsed with the solution you
want to transfer following essentially the same procedure as that described above
for burets, except that you must use a bulb to suck the small doses of water or the
new liquid into the pipet rather than pouring them in from a beaker. Figure 6: Using a Pipet To begin a pipetting operation hold the pipet vertical and rest the pointed end on
the bottom of the container from which you want to transfer a sample. Wi...
View Full Document
This note was uploaded on 04/09/2013 for the course CHE CHE 2C taught by Professor Nasiri during the Spring '07 term at UC Davis.
- Spring '07