WebPour ~450 mL of Milli-Q H 2 O into a 500-mL glass beaker. 2. Add 500 mg of PEI to the beaker with stirring. 3. Add concentrated HCl drop-wise to the solution to pH <2.0. 4. Stir until the PEI is dissolved (~2-3 h). Maintain the pH <2.0 throughout. Approximately 800 μL of 12 M HCl will be required for full PEI dissolution. WebJun 9, 2024 · 美国POLYSCIENCES公司成立于1961年，主要生产和经营LIFE SCIENCES生命科学（胶体金,不含甲醛的甲醇等），病理学和显镜学 微球和粒子和磁珠各种单体和聚体等产品。polysciences公司是世界上最大最全的多聚化合物供应商,同时是世界一流的免疫学,组织化学试剂耗材供应商._PEI,POLYSCIENCES,POLYSCIENCES现货,23966-2 ...

International Distributors Polysciences

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Polysciences

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