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21
Cocktails & Scintillators for Microplate Formats
MicroScint LSC Cocktails
Specifically formulated for use with PerkinElmer’s TopCount Microplate Scintillation and
Luminescence Counter, MicroScint
™
cocktails mix easily with samples for rapid uptake of
aqueous and non-aqueous samples in microplates. These safer cocktails provide you
with a choice of optimal characteristics, including excellent counting efficiency, high
sample capacity, quench resistance and polystyrene compatibility.
MicroScint-20
MicroScint-20 cocktail accepts dilute aqueous
samples at up to 20% loading (up to 25 µL in
100 µL MicroScint-20). With these sample types,
MicroScint-20 cocktail mixes easily and com-
pletely upon agitation with an orbital shaker.
It is the cocktail of choice for counting filters
that have not been completely dried.
MicroScint-20 has an absolute, unquenched
tritium efficiency of approximately 52% when
measured in a 24-well white polystyrene
OptiPlate™ microplate.
MicroScint-40
MicroScint-40 cocktail accepts dilute aqueous
samples at up to at least 40% loading (up to
70 µL in 100 µL MicroScint-40). It also mixes
easily with most sample types but slightly longer
agitation may be necessary when handling large
sample volumes or more concentrated samples.
MicroScint-40 has an absolute, unquenched
tritium efficiency of approximately 40% when
measured in a 24-well white polystyrene
OptiPlate microplate.
MicroScint-E
MicroScint-E cocktail is used for assays that
require in situ partitioning of the radionuclide-
containing lipid phase from the aqueous phase
in microplates. This cocktail extracts the lipids
or other non-polar compounds from the aqueous
phase in such assays, enabling direct counting
of the samples after cocktail addition, since
the label is preferentially taken up into the
lipophilic cocktail.
MicroScint-E cocktail has an
absolute, un-quenched tri-
tium efficiency of approxi
-
mately 50% when measured
in a 24-well white poly-
styrene OptiPlate microplate.
MicroScint-O
MicroScint-O cocktail is used for counting non-
polar organic samples such as hexane, heptane,
ethyl acetate, etc., and for dried filters. It is
particularly useful for organic samples produced
from enzyme inhibition assays. MicroScint-O
cocktail does not contain surfactants and is
not miscible with water, so it is unsuitable
for counting aqueous samples.
MicroScint-O cocktail has an absolute, un-
quenched tritium efficiency of approximately
58% when measured in a 24-well white poly-
styrene OptiPlate microplate.
MicroScint-PS
MicroScint-PS cocktail, specifically formulated
for polystyrene compatibility, is suitable for
use with virtually any type of microplate and
provides high counting stability with minimal
change in count rate within a 24 hour period. It
has almost identical sample handling capabilities
to MicroScint-20 with respect to sample concen-
tration and loading, but has a lower viscosity
and is therefore easier and quicker to dispense.
MicroScint-PS cocktail has an absolute, un-
quenched tritium efficiency of approximately
48% when measured in a 24-well white poly-
styrene OptiPlate microplate.