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在冶金分析中,使用离子交换分离钨、钼已取得一定成效。但一般需采用较大型交换柱(Φ25×200);淋洗剂用量大(约300毫升),耗时较长。本文试用细粒度(20—50微米)的强硷性阴离子交换树脂、小型交换柱(Φ8×100),在负压下成功地进行了钨、钼分离。使淋洗剂体积缩小至原来的1/10以下;速度提高3—4倍。方法简便、准确。试验部分 (一)离子交换装置以直径为8毫米的聚乙烯管加工成一端为球形,一端为细管状。如图1安装。装入离子交换树脂(天津试剂二厂生产的高速液相色谱固定相YSGNR_4Cl的付产品、粒度20—50微米,高度为10—12厘米。以1:40氢氟酸15毫升(流速约0.8—1.2毫升/分,以下流速均同此)通过后备用。
In metallurgical analysis, the use of ion exchange separation of tungsten, molybdenum has achieved some success. But generally need to use a larger exchange column (Φ25 × 200); eluent dosage (about 300 ml), take longer. In this paper, a strong alkaline anion exchange resin with fine particle size (20-50 μm) and a small exchange column (Φ8 × 100) were used to separate tungsten and molybdenum successfully under negative pressure. So that the volume of eluent reduced to the original 1/10 the following; speed increased 3-4 times. The method is simple and accurate. Experimental part (a) of the ion exchange device to a diameter of 8 mm polyethylene tube processed into a spherical at one end, a thin tube at one end. As shown in Figure 1 installation. Charge ion exchange resin (Tianjin Reagent Factory production of high-speed liquid phase stationary phase YSGNR_4Cl pay products, particle size 20-50 microns, a height of 10-12 cm with 1:40 hydrofluoric acid 15 ml (flow rate of about 0.8- 1.2 ml / min, following the same flow rate) through the back-up.