セパラックス-SP（富士フイルム製）からセレカ-VSP（東洋濾紙製）への移行

The stable supply of the cellulose acetate membrane (SEPARAX-SP) for electrophoresis support media became difficult with production device deterioration. Therefore, Toyo Roshi Kaisha, Ltd. was transferred production technology from Fuji Co. and tried to develop a new membrane with similar performance. At the beginning physical properties of the membrane differed slightly possibly due to the difference of production device; however, recently a new membrane with similar performance to SEPARAX-SP has been completed and named SELECA-VSP.Physical properties, such as tearing strength and elasticity, electrophoretic properties of SELECA-VSP were similar to those of SEPARAX-SP. By scanning electron microscope, SELECA-VSP membrane surface and cross section showed similar image and uniformly pored.To investigate a practical use of SELECA-VSP in clinical laboratory, a working group was organized by Japanese Electrophoresis Society and has examined basic and clinical performance of SELECA-VSP. Because the results have been revealed almost good performance, we go on developing for placing SELECA-VSP on the market.