CFR
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864.8185—Calibrator for red cell and white cell counting.
(a) Identification.
A calibrator for red cell and white cell counting is a device that resembles red or white blood cells and that is used to set instruments intended to count red cells, white cells, or both. It is a suspension of particles or cells whose size, shape, concentration, and other characteristics have been precisely and accurately determined.
Code of Federal Regulations
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