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Abdos Ria Vials are polypropylene/polystyrene tubes generally used in Radioimmuno Assay –a scientific method used to test antigens (for sample, hormone levels in the blood) without the need to use a bioassay. Abdos Ria Vial PP are clear and can withstand 3000*g RCF during centrifugation while the transparent polystyrene tubes can withstand 1400*g RCF. The PP tubes can accept common acids, alkalies & solvents at room temperature while the PS tubes can accept mild bases, weak acids but not organic solvents. Amber Ria Vials are used for light-sensitive samples.