[One simple and efficient method for purification of IgG McAb from mice ascites: caprylic acid/ammonium sulfate precipitation].

Several ascitic IgG McAbs were purificated by caprylic acid/ammonium sulfate precipitation (CA-AS), ammonium sulfate precipitation (AS) and SPA affinity chromatography. Purity of IgG purificated by CA-AS ranged from 87% to 91%, higher than that obtained by CA (65%-70%), lower than that obtained by SPA affinity chromatography (100%). The yield of IgG purificated by CA-AS ranged from 4.8 g/L to 5.5 g/L, lower than that obtained by CA (7.0-7.9 g/L), more higher than that obtained by SPA affinity chromatography (0.6 g/L). The recovery of IgG purificatied by CA-AS ranged from 39.0% to 44.4%, lower than that obtained by CA (56.0%-65.0%), more higher than that obtained by SPA affinity chromatography (7.4%). The ELISA titer of 4E2 or H6McAb was not impaired by purification of CA-AS. The above results suggested that CA-AS is one simple, efficient, rapid and low-cost method for purification of IgG McAb from ascitic fluid.