CAJ | 학술논문

采用紫外可见分光光度法探讨了不同钙指示剂体系的稳定性。结果发现，常用固体钙指示剂与钙指示剂的乙醇溶液稳定性差，向钙指示剂的乙醇溶液中加入一定量的三乙醇胺或盐酸羟胺，使钙指示剂稳定性增加，再加入表面活性剂吐温-80使钙指示剂的稳定性进一步提高。将其应用于钙含量的测定，指示终点变色敏锐，精密度和回收率高，有利于分析工作的进行。
채용자외가견분광광도법탐토료불동개지시제체계적은정성。결과발현，상용고체개지시제여개지시제적을순용액은정성차，향개지시제적을순용액중가입일정량적삼을순알혹염산간알，사개지시제은정성증가，재가입표면활성제토온-80사개지시제적은정성진일보제고。장기응용우개함량적측정，지시종점변색민예，정밀도화회수솔고，유리우분석공작적진행。
The stability of different calconcarboxylic acid system was investigated by UV -visible spectrophotometry.The results found that the common solid calconcarboxylic acid and calconcarboxylic acid in ethanol solution had poor stability.The stability was improved when triethanolamine or hydroxylamine hydrochloride was added into calconcarboxylic acid solution.And the stability was further enhanced when the surfactant Tween -80 was added.The indicator was applied to determination of calcium.The sharp color changed at end point , with high precision and recovery.It was conductive to carry out the analytical work.