The present invention concerns a multipart fluid system for dialysis therapy, wherein the multipart fluid system comprises an anticoagulation fluid and at least one treatment fluid from the group consisting of dialysis fluid and infusion fluids. According to the invention the anticoagulation fluid comprises 15-40 mM citrate and the at least one treatment fluid comprises 1.5-8 mM citrate and &gE10 mM bicarbonate. The present invention further concerns a system for citrate anticoagulation in an extracorporeal blood circuit.
