... fast immuno-chromatography technique to detect Brucella Ab in bovine serum, plasma and whole blood qualitatively. When testing, Brucella Ab in sample ... anticoagulated whole blood, use for that very day; 4.2 Serum Collect blood, put at 37℃ for 1-2h, take the ... supernatant, centrifuge at 1500r/min for 10min, separate the serum. The serum can store for 2-3 days at 4℃, for long ...