Side-by-side sampling tests were also
made in Sede Boker, Israel. Two of the
SFU samplers were operated in parallel in
two experiments. In the first, both samplers
used Nuclepore@ filters for both the coarse
and fine samples. In the second, a 2 JLm
pore size Gelman Teflo@ was substituted
for the fine particle NUclepore@T. he coarse
filter must be the 8 JLm pore coated
Nuclepore@ because the size dependent
particle separati°p' process depends on the
unique properties of the Nuclepore@-type
filter. In addition, coated filters should be
used to reduce particle bounce.