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采用乙二胺四乙酸二钠盐掩蔽铜氨溶液中的铜离子,制定了铜矿氨浸液中游离氨的快速测定方法。乙二胺四乙酸二钠盐的加入量以超过含铜量的50%为适宜。样品中铜含量0～13克/升对结果无显著误差。测定方法如下:准确吸取铜氨液1毫升,于预先盛有
A new method for the determination of free ammonia in ammonia leaching solution of copper mine was developed by masking cupric ion in copper ammonia solution by ethylenediaminetetraacetic acid disodium salt. The amount of ethylenediaminetetraacetic acid disodium salt added is more than 50% of the copper content. The copper content in the sample was 0 ~ 13g / L, with no significant error on the result. The determination method is as follows: 1 ml of copper ammonia solution is accurately drawn in advance