Heparin Assay | Aniara Diagnostica, Inc. https://validator.w3.org/feed/docs/rss2.html BUFFERS USED FOR USP/EP HEPARIN QC ASSAYS Purified Human Protein: Thrombin Purified Human Protein: Anti-Thrombin (AT) Chromogenic Substrates: Factor Xa FAQs Purified Bovine Enzyme: Factor Xa Heparin Anti-IIa (Kinetics) Chromogenic Substrates: Thrombin USP/EP COMPLIANT HEPARIN QC KITS About Us Home USP‐EP ANTI‐FXa AND ANTI‐FIIa ASSAY BUFFERS