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无氰络合滴定铜合金中锌时,采用适当的掩蔽剂,选择性较高,但锰严重干扰,需在测出锰后加以换算校正,甚为不便。试验表明,采用经典的硝酸-氯酸钾法,使锰以二氧化锰析出可以简便迅速地消除锰的干扰。本文报导了条件试验结果与改进后的直接测定方法。一条件试验1 方法:称取标样(ZHAlFeMn66-6-3-2)0.5克,加硝酸5毫升溶解后,加氯酸钾0.2克煮沸一分钟,加水20毫升,经快速定性滤纸滤入100毫升量瓶
Non-cyanide complexation titration of copper alloy zinc, the use of appropriate masking agent, higher selectivity, but the serious interference of manganese, to be measured after the conversion of manganese to be corrected, very inconvenient. Experiments show that the use of classic nitrate - potassium chlorate method, manganese manganese dioxide precipitation can be easily and quickly eliminate the interference of manganese. This article reports the results of conditional testing and the improved direct measurement method. A condition test 1 method: Weigh standard sample (ZHAlFeMn66-6-3-2) 0.5 g, 5 ml of nitric acid dissolved, potassium borate 0.2 g boil one minute, add 20 ml of water, quickly qualitative filter paper into 100 ml amount bottle