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PE 2400元素分析仪的还原管,是一个内部填充铜粉的石英玻璃管,使用一定次数后,管内铜粉氧化成氧化铜,并结成块,还原管报废。因石英玻璃管价格昂贵(约＄100/支),故再生使用很有必要。国内有人用浓酸浸泡,使氧化铜溶解于酸中,但反应慢,腐蚀性强,也不利于铜的再生。我们采取加入石英砂的方法,使还原管再生取得了较好的效果。 1 试验部分1.1 仪器 PE2400 CHN元素分析仪(美PE公司) 管式电炉(800W)(哈尔滨第二电炉厂产) 控温仪NYC—2型(南京尧长机械厂产)1.2 松散剂石英砂的制备把石英砂(CP,60～80目)放入干净烧杯中,用浓盐酸浸泡2次,每次20min,再用玻璃丝过滤,用蒸馏水和去离子水多次冲洗,到无Cl~-为止,烘干,在500℃下灼烧1h即可,这样处理的石英砂,因除掉了可溶性金属离子和有机杂质,保证了纯度,所以可作为铜粉的松散剂。
PE 2400 elemental analyzer of the reduction of the tube, is an internal copper powder filled quartz glass tube, the use of a certain number of times, the tube of copper oxide into copper oxide, and the formation of blocks, reduction tube scrapped. Due to the expensive quartz glass tube (about $ 100 / support), it is necessary to recycle. Some people use concentrated acid soaked in copper oxide dissolved in acid, but the slow reaction, strong corrosive, is not conducive to the regeneration of copper. We take the method of adding quartz sand, so that the reduction tube regeneration achieved good results. 1 Test Section 1.1 Instrument PE2400 CHN Elemental Analyzer (PE) Tube Furnace (800W) (Harbin Electric Furnace No. 2) Temperature Controller NYC-2 (Nanjing Yao Chang Machinery Factory) 1.2 Loose Agent Quartz sand Preparation Quartz sand (CP, 60 ~ 80 mesh) into a clean beaker, soaked twice with concentrated hydrochloric acid, each 20min, and then filtered through glass wool, washed with distilled water and deionized water multiple times until no Cl ~ , Drying, burning at 500 ℃ for 1h, so treated quartz sand, due to the removal of soluble metal ions and organic impurities to ensure the purity, it can be used as a loose powder copper powder.