Rheumatoid Factor (RF) Concentrate - > 25 kIU/mL

Product Name	Rheumatoid Factor Concentrate ≥ 15,000 IU/mL
Source	Human Plasma
Catalogue Number	508-15
Form	Liquid
Purity	Purified
Activity	≥ 25,000 IU/mL
Protein	Reported in mg/mL (Biuret)
Specific Activity	Reported in IU/mg protein
Appearance	Gray to brown, hazy liquid
Formulation	Solution in 20 mM sodium phosphate, 0.5 M sodium chloride, 0.02% Proclin 300, pH 7.2.
Features	- Highly concentrated for minimum volume additions for control/calibrator manufacturing versus plasma or serum, saving money on other material components - Native-sourced, mimicking elevated RF human donor samples during assay interference studies - Ideal for spike-interference studies in assay development and validation - Available in large batch sizes to minimize lot-to-lot variability
Storage	-20°C
Recertification	1 year from date of manufacture
Synonyms	RF, RF Concentrate
Infectious Disease Testing	Negative or non-reactive at the donor level for anti-HIV 1 and 2, anti HCV, HBsAg, HCV NAT, HIV-1 NAT, and syphilis by FDA approved methods.