CONTROL, ALINITY I HBSAG QUAL II CTL US The Alinity i HBsAg Qualitative II Controls are used for monitoring the performance of the Alinity i analyzer (reagents, calibrators and instrument) when used for the qualitative detection of hepatitis B surface antigen (HBsAg) using the Alinity i HBsAg Qualitative II and Alinity i HBsAg Qualitative II Confirmatory reagent kits Negative Control contains recalcified human plasma, preservatives: ProClin 950 and sodium azide Positive Control contains inactivated purified human HBsAg (subtype ad/ ay) in phosphate buffer with human plasma and protein (bovine serum albumin) stabilizers