论文部分内容阅读
用极譜法在氨底液中測定銅鋅以及在醋酸钠底液中測定鉛鋅,是一种比较快速的方法。但是,为了适应1960年地貭勘探事业的更大跃进的需要,我們將原来的常量法改为半微量法,省去了灌容量并等过程,大大簡化了操作手續,提高了功效,且可节省大批的試剂,結果良好。其方法如下。 銅鋅的測定:称0.1—0.2克試料(视含量高低而定),于10毫升小烧杯中。加2—3毫升浓盐酸,搖匀后,在低溫电炉上加热片刻。加双氧水(30％)1—2滴,搖匀并继续加热至試样分解完全为止。加热蒸发至溶液刚干,冷却后,准确加入底液10毫升。用短玻璃棒攪匀。待沉淀下降后,分别在-0.3—-0.6伏,-1.1—-1.6伏間記图。
Polarographic determination of copper and zinc in the ammonia solution and determination of lead and zinc in the sodium acetate solution is a relatively rapid method. However, in order to meet the needs of a greater leap forward in the geo-exploration business in 1960, we changed the original constant method to semi-trace method, eliminating the need for irrigation capacity and other processes, greatly simplifying procedures and improving efficiency, and Save a large number of reagents, the result is good. The method is as follows. Determination of copper and zinc: Weigh 0.1-0.2 g sample (depending on the content level), in a small 10 ml beaker. Add 2-3 ml of concentrated hydrochloric acid, shake well and heat for a while on a low temperature electric cooker. Add hydrogen peroxide (30%) 1-2 drops, shake and continue heating until the sample decomposition completely. Heated to evaporate the solution just dried, after cooling, add 10 ml of base solution accurately. Mix with a short glass rod. After precipitation decreased, respectively, in the -0.3--0.6 volts, -1.1--1.6 volt interval between mind map.