Copyright InnovaPrep LLC
www.innovaprep.com 6
2
ACD-200
B
OBCAT
M
ETHOD OF
O
PERATION
The InnovaPrep ACD-200 Bobcat uses an electret filter to capture
particles onto the surface of polymer fibers in the filter. A novel Wet
Foam Elution
™
process is then employed to wash the particles off of the
fiber surfaces into very small liquid volumes.
S
AMPLE
C
OLLECTION ON AN
E
LECTRET
F
ILTER
The system uses a dry 52 mm electret filter as the collection media.
Electret filters are made with a combination of positively charged and
negatively charged fibers. This substantially increases the collection
efficiency of the filter and allows for the use of lower pressure drop
filters, which, in turn, allows for higher sampling rates for extended
periods using battery power. Additional advantages include low
consumable costs, ease of use, and high durability. It has the ability to
operate below 0°C
—
a limitation for most collectors.
W
ET
F
OAM
E
LUTION
The single-use kit comes with everything you need to recover a fluid
sample, including the Filter, a Sample Cup with Lid, an Elutor, and a
canister of Elution Fluid. The patented Wet Foam Elution process (US
patents https://www.innovaprep.com/patents) is much more efficient
than liquid rinsing for the following reasons:
•
Volume Expansion
When rinsing a filter with liquid, most of the liquid volume is
used to fill the dead space inside the filter housing; only a small
portion of the fluid is in contact with the filter surface. This can
be minimized to an extent by reducing the cross-sectional area
of the fluid path across the filter, but a large portion of the
liquid is still underutilized. However, foam is 80-90% gas, which
fills the empty space without contributing to the final sample
volume.
