Chapter 4: Using Your RapidVap
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22
Original instructions
Four sample blocks are available for the RapidVap N
2
/48. Recommended speeds
are as follows:
TUBE
SIZE
SAMPLE
VOLUME
VORTEX
SPEED
12 mm (6 ml)
3 ml
100%
13 mm (10 ml)
5 ml
100%
16 mm (23 ml)
12 ml
100%
20 mm (35 ml)
18 ml
100%
Loading Glassware Into the RapidVap
Smooth operation of the RapidVap is dependent upon proper balance of the
machine. Therefore, if less than a full load of samples is run, it is important to
load samples into the RapidVap in a fairly uniform manner distributing the weight
of the samples and glassware evenly in the sample block.
IN ORDER TO MAXIMIZE THE PERFORMANCE OF THE
RAPIDVAP IT IS IMPORTANT THAT SOME OF THE
SAMPLES ARE CLUSTERED AROUND THE FRONT LEFT
HAND BLOCK MOUNTING STUD. THE BLOCK
TEMPERATURE SENSOR IS LOCATED ADJACENT TO THIS
BLOCK MOUNTING STUD. BY POSITIONING THE SAMPLE
NEAR THE SENSOR, THE SENSOR WILL DETECT THE
COOLING EFFECT OF THE EVAPORATING SAMPLES AND
SIGNAL THE CONTROLS TO SUPPLY MORE HEAT TO THE
SAMPLE BLOCK.
The best evaporation rate is achieved under conditions that maximize sample
surface area. These include using the largest tube possible, and using the highest
vortex speed possible.
When less than 8 samples are run in the RapidVap N
2
or less than 48 samples are
run in the RapidVap N
2
/48, nitrogen flow can be directed to 2, 4, or 6 positions. It
is important to position glassware properly in the RapidVap N
2
when less than a
full block is run to ensure that nitrogen gas is directed downward where the sample
is located. Note the label on the hub in the center of the chamber. This indicates
which nozzles on a RapidVap N
2
or nozzle clusters on a RapidVap N
2
/48 will be
activated. If one or two positions are to be run, samples must be positioned at
locations identified (2). If three or four positions are to be run, samples must be
positioned at locations identified (4). If five or six positions are to be run, samples
must be positioned at locations identified (6). If seven or eight positions are to be
run, samples may be positioned at any of the locations. When using the RapidVap
N
2
/48, glassware may be placed anywhere within the activated cluster of nozzles.
N
