This aspirator was designed by G. Lisensky and D. Keefer.
This aspirator operates by the Bernoulli effect.
Procedure
Wear eye protection
Assemble sprayer parts.
Connect the sidearm to a compressed gas source (not shown in movie).
Adjust sprayer. Slide the capillary tube through the pipet tip. Slowly
pull the capillary tube back until solution aspirates. (If bubbles emerge
from the other end the capillary tip has been pulled back too far.) Liquid
will rise up the tube and eventually spray out the tip. To stop spraying,
extend the capillary through the tip. To empty the tube, pull the capillary
inside the tip.
Test sprayer first with water by spraying a paper towel. Next rinse
the sprayer with methanol and then empty the tube.
Materials
1 mL graduated pipet (such as Pyrex No. 7065)
14/20 ground glass joint (Ace Glass 7568-06, Chem Glass CG-106-05, or
Wilmad-Lab Glass LG-1016-110)
Teflon thermometer adapter (Ace Glass 8300-07, Chem Glass CG-1048-05,
Wilmad-Lab Glass LG-10447-302, or VWR 70680-396)
7 mm OD glass tubing
Glassblowing skills
Compressed gas source
