預裝 Poly-Prep柱，用于重力流層析樣品制備和其它小規模試驗。0.8 x 4 cm 聚丙烯層析柱帶有刻度。每個柱均填裝有 2 ml 的標準柱床體積 AG® 離子交換樹脂，并內置一個 10ml 儲液器。同時提供可與泵、儲液器或其他系列層析柱連接的 Poly-Prep 疊合蓋。
Bio-Rad伯樂預裝離子交換填料AG50W-X8重力流柱層析柱731-6214描述，Pkg of 50, 9 cm high, 2 ml of prepacked analytical grade 50W-X8 resin, 200–400 mesh, 63–150 particle size, hydrogen form, includes 10 ml reservoir.
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