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1 引言采用EDTA滴定、ICP和AA法测定洗涤剂用沸石的钙离子交换量时.需要将溶液与沸石分离后进行,因而不易测定交换过程中沸石的钙离子交换速率.而采用ISE法,可以在沸石与钙离子交换时,实时测定溶液中钙离子浓度随交换时间的变化,求得钙离子交换速率.本文采用ISE法测定洗涤剂用沸石的钙离子交换速率及交换量.2 实验部分2.1 仪器与试剂 pXS-215型离子活度计(上海雷磁仪器厂);钙离子选择电极(ISE)和甘汞电极(上海雷磁仪器厂);记录仪(上海大华仪器厂).洗涤剂用4A沸石(山东铝厂),0.1mol/L标准CaCl_2溶液,0.5mol/L NaOH溶液.
1 Introduction EDTA titration, ICP and AA Determination of calcium ion exchange detergent zeolite when the solution needs to be separated from the zeolite, which is not easy to measure the zeolite exchange process of calcium ion exchange rate using the ISE method, you can When the zeolite is exchanged with calcium ion, the calcium ion concentration in the solution is measured in real time with the change of exchange time, and the calcium ion exchange rate is obtained.In this paper, the calcium ion exchange rate and the exchange amount of detergent zeolite are determined by ISE method.2 Experimental 2.1 Instruments and reagents pXS-215-type ion meter (Shanghai Lei magnetic instrument factory); calcium ion selective electrode (ISE) and calomel electrode (Shanghai Lei magnetic instrument factory); recorder (Shanghai Dahua Instrument Factory) With 4A zeolite (Shandong Aluminum Plant), 0.1mol / L standard CaCl2 solution, 0.5mol / L NaOH solution.