Patent ID: 7863040

Claim:
A sampling tube for collecting and processing a whole blood sample, the sampling tube containing a reagent for differential hemolysis of said whole blood sample, wherein said reagent for differential hemolysis comprises a salt and an anti-coagulant, wherein said salt is selected from the group consisting of KBr, KJ, KSCN, and a salt consisting of a cation selected from the group consisting of wherein m is 0 or 1 and n is 4 or 6, and an anion selected from the group consisting of chloride, tetrafluoroborate, octylsulfate, iodide and thiocyanate, wherein said sampling tube is a ready-to-use and single-use sampling tube, and wherein said differential hemolysis reagent if mixed 1:1 with a blood sample diluted 1:10 in physiological saline leads to a hemolysate of which 50 aliquots of 10 Î¼L can be applied to a filter in an HPLC-system having a diameter of 2 mm and 0.5 Î¼m pore size without blocking said filter.