Sample Prep Part 8

So as we move on to Slides 21 and 22, you can see that we summarized the data to more clearly present the general trends.  As we move up in particle size with a given membrane pore size, the efficiency increases.  So does the concentration factor.  Not so surprising, I guess.  What is interesting is that carryover is always about the same, and is always relatively low.  Continue…

Sample Prep (part 7)

Starting with Slide 20 there are a half dozen slides showing performance data for various sizes of the polystyrene microspheres, or “beads.”  In this little bit of data I’m only going to show four bead sizes and two different concentration cell pore sizes.  The beads we used for this came from Polysciences.  We like using their yellow-green beads, because they don’t leach dye very much, and they are easy to analyze using a typical fluorometer.  Continue…

Sample Prep Part 6

Slide 16 shows InnovaPrep’s new ACD-200 “Bobcat” aerosol collector.  The ACD stands for Aerosol collector, Dry.  The 200 is because it operates at 200 liters per minute aerosol collection rate.  The Bobcat aerosol collector could also be called an air sampler.  Dry filter air collectors are nothing new.  The problem with them has always been how to harvest the collected particles in a quick, efficient and useful way.  Continue…