Fl-1013 Liquid Nitrogen Dewar Assembly - Horiba Scientific FluoroMax-4 Operation Manual

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FluoroMax -4 & FluoroMax -4P with USB rev. D (30 Jul 2012)

FL-1013 Liquid Nitrogen Dewar Assembly

For phosphorescence or delayed fluorescence measure-
ments, samples are often frozen at liquid-nitrogen tem-
perature (77 K) to preserve the fragile triplet state. The
sample is placed in the quartz cell and slowly immersed
in the liquid-nitrogen-filled Dewar flask. The white Tef-
®
lon cone in the bottom of the Dewar flask keeps the
quartz sample-tube centered in the Dewar flask. The Tef-
®
lon cover on the top of the Dewar flask holds any ex-
cess liquid nitrogen that bubbled out of the assembly. A
pedestal holds the Dewar flask in the sampling module.
A special stove-pipe sample cover replaces the standard
sample lid, so that liquid nitrogen can be added to the
Dewar flask as needed. The Dewar flask holds liquid ni-
trogen for at least 30 min with minimal outside conden-
sation and bubbling.
Included in the FL-1013 Liquid Nitrogen Dewar Assem-
bly, the Dewar flask can be purchased as a spare. The
bottom portion, which sits directly in the light path, is
constructed of fused silica.
Note:
side of the Dewar flask, it must be re-
evacuated.
Caution:
Refer to your Material Safety Data Sheet
(MSDS) for information on the hazards of cryogenic
materials such as liquid nitrogen.
If condensation appears on the out-
FL-1013 Liquid Nitrogen
Dewar Assembly.
12-3
Components & Accessories