Labconco RapidVap Vacuum, N2 and N2/48 Evaporation Systems 7910015 - Manual (Page 29)

25
Chapter 4: Using Your RapidVap
Product Service Domestic 1-800-522-7658, International 816-333-8811
Glassware Selection and
Speed Setting Guidelines
The speed at which the sample block should oscillate is
dependent on the sample tube size and the sample
volume. Generally, the tube should be no more than
half full. The faster the speed, the higher the sample
will vortex giving a maximum surface area and
therefore a maximum evaporation rate. However, if the
speed is too fast, samples will raise above the top of the
tube and be lost. Smaller tubes can be run faster than
larger tubes. The following table gives recommended
safe speeds for tubes loaded with water.
Experimentation
with the specific sample may determine faster speeds.
When setting the speed, keep in mind that the sample
will raise up slightly in the tube when vacuum is
applied to the chamber of the vacuum model.
GLASS VIALS USED IN THE RAPIDVAP
SHOULD BE OF THE STYLE THAT DO NOT
HAVE THE BEAD OR LIP ON THE TOP
EDGE. IF VIALS WITH BEADS ARE USED,
THE BEADS COULD HIT EACH OTHER
AND BREAK THE GLASS.
Several different size sample blocks are available for
the RapidVap Vacuum model. The maximum
recommended sample volumes and vortex speeds are as
follows:
TUBE
SIZE
SAMPLE
VOLUME
VORTEX
SPEED
12 x 75 mm (6 ml) 3 ml 95%
13 x 100 mm (10 ml) 5 ml 95%
16 x 150 mm (23 ml) 12 ml 95%
15 ml centrifuge 7.5 ml 66%
28 mm (46 ml) 23 ml 48%
600 ml 50 ml 45%
100 ml 45%
200 ml 38%
300 ml 29%
400 ml 20%
450 ml 18%
V
)