title: A simple, inexpensive quality control material for ortho ELT-8 platelet counts.
abstract: Dilutions of 1: 600 and 1: 3000 of 1 mum diameter polystyrene latex suspensions are simple, inexpensive materials for quality control of Ortho ELT-8 platelet counts. The coefficient of variation (CV) for a 12-week period at the 350 X 10(9)/l level was 2.2%, comparable with that of a commercial control. The CV at the 70 X 10(9)/l level was 3.5%.
mesh_terms: D008863:Microspheres; D010976:Platelet Count / Q000295:instrumentation* / Q000592:standards; D011786:Quality Control