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铜合金中硅的测定,通常采用稀硝酸与氟氢酸在塑料杯中处理试样,使硅生成氟硅酸。为了防止氟硅酸的蒸发,要在水溶中进行加热,温度不能高于70℃,并需转移溶液等手续。给操作和批量分析带来许多不便。由于溶解温度低,氮氧化物难以去除,还需加尿素分解。氟离子存在要以硼酸络合。该方法操作较繁锁,速度慢,分析结果的准确度和稳定性较差。为此,在参阅有关资料经
Determination of copper in copper alloys, usually dilute nitric acid and hydrofluoric acid in the plastic cup sample processing, the silicon generated fluorosilicic acid. In order to prevent the evaporation of fluorosilicic acid, it is necessary to heat it in water-soluble solution. The temperature should not be higher than 70 ° C and procedures such as transfer of solution are required. To the operation and batch analysis brings a lot of inconvenience. Due to the low dissolution temperature, nitrogen oxides are difficult to remove, but also need to add urea decomposition. The existence of fluoride ions to boric acid complexation. The method is cumbersome and slow to operate, and the accuracy and stability of the analysis results are poor. To this end, see the relevant information