Appendix C: RapidVap Specifications
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59
Original instructions
Evaporation Time
– 16 mm dia. Sample Tube
(Time in Minutes)
Solvent:
Methylene
Chloride
Toluene
Acetonitrile
Water
Block Preheat &
Block Set Point
Temperature:
50°C
80°C
75°C
80°C
Vacuum:
200 mbar
200 mbar
330 mbar
133 mbar
Starting Volume
10 ml
18
25
25
119
8
14
20
22
101
6
10
14
17
72
4
8
12
13
50
2
4
6
7
26
Number of samples: 69
Vortex speed: 95%
Vacuum pump: Labconco model – 79249-00
Rated free air flow – 88 L/min
Max. attainable vacuum – 31 mbar
RapidVap N
2
Models
The following tables indicate the approximate time required to evaporate various
common solvents. Tables A and B show the average time required to evaporate 8
samples from the selected beginning volume to a level where the solvent is at the
top of the Cool-Zone stem. Tables C shows the average time to evaporate various
solvents in different length Cool-Zone stems. It shows the average time for
solvents to evaporate from the top of the stem to the indicated remaining volume
when 8 vials are run simultaneously. The following example illustrates the use of
the charts:
Assume that a starting volume of 300 ml methylene chloride is
placed in a 600 ml sample vial with a 1.5 ml stem. The vial is
covered with a cap. The desired endpoint volume is 0.5 ml. From
Table A, the time to evaporate to the top of the stem is 59 minutes.
From Table C, the time to evaporate from the top of the stem to 0.5
ml is 17 minutes. Adding the two times together, the total time to
evaporate 300 ml of methylene chloride to 0.5 ml in a sample tube
with a 1.5 ml stem is approximately 76 minutes.
If fewer than eight samples are run at a time, the time to evaporate
will become shorter.
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