Tips on Centrifugation without a Balance Tube |
||
Safe centrifugation requires balanced loading of the centrifuge rotor. Imbalanced rotors can lead to damage to centrifuge rotors. When an odd number of tubes are loaded, a balance tube is loaded opposite the last sample tube. The balance tube must be identical to the sample tubes, and must contain liquid of equal density to the sample. Balancing by mass alone is not correct, since the centrifugal force that the sample applies to the rotor is dependent on both mass and radius. See Figure 1 for balance loading patterns based on a 12-position microcentrifuge rotor.
|
||
|
||
Credits Frothingham, R. (1999, February). Centrifugation without a balance tube. American Biotechnology Laboratory, 17, 84. Dr.
Richard Frothingham is a Staff Physician in the Infectious Disease
Section, Durham VA Medical Center. |