For monitoring the precision of Rheumatoid Factor testing procedures including nephelometric and latex agglutination methods. Target Rheumatoid Factor levels of 34, 79 and 150 U/mL.
- Liquid, human serum based
- Normal, slightly elevated, and greatly elevated RF levels
- 2 year shelf life at –20°C to –70°C
- 30 day open-vial stability at 2–8°C
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