Making Diluted Solutions of MicroSpheres

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Procedure - From liquid with ~ 10% solids

  • Shake microsphere bottle to evenly disperse the particles.
  • Remove 100ul of cloudy white microsphere solution and dilute with 20ml of deionized water (200:1 dilution).
  • Bovine Serum Albumin (BSA) and (for non-biological particles) 1% polyethylene glycol can be added as anti-stick agents.
  • For biological particles BSA and Phosphate-Buffered Saline (PBS - 0.8% NaCl, 0.02% KCL, 0.02M PO4, pH 7.3 (percentage by weight)) can be used as anti-stick agents.

PBS Wikipedia

Students: If this recipe is inadequate (too many or too few particles) please revise.