论文部分内容阅读
本文提出以铅离子选择电极为指示电极,采用标准加入法对铸铜合金中铅的测定条件进行研究。以六次甲基四胺-硝酸钾为离子强度调节缓冲剂,试液先在含乙二胺强碱性条件下,硫酸联氨将铜离子还原成单质以消除其干扰,然后将被测试液调至pH 5～6时进行测定。一仪器与试剂 PXS-201型离子活度计(上海第二分析仪器厂) DD-2B型电极电位仪(江苏泰县无线电厂) 305型铅离子选择电极(江苏泰县无线电厂) 217型双液接饱和甘汞电极(外盐桥充以0.1MKNO_3)
In this paper, lead ion selective electrode as the indicator electrode, using standard addition method for determination of lead in copper alloy casting conditions. To six times methyltetraamine - potassium nitrate as ionic strength adjustment buffer, the test solution containing ethylenediamine strong basic conditions, the hydrazine sulfate copper ions will be reduced to a single element to eliminate interference, and then the test solution Adjusted to pH 5 ~ 6 when measured. An instrument and reagent PXS-201-type ion meter (Shanghai Second Analytical Instrument Factory) DD-2B electrode potentiometer (Jiangsu Taixian Radio Factory) 305-type lead ion selective electrode (Jiangsu Taixian Radio Factory) 217 double Liquid then saturated calomel electrode (external salt bridge filled with 0.1MKNO_3)