【摘要】 针对配位滴定钙镁的指示剂问题进行探讨 ,以酸性铬蓝K 萘酚绿B 聚乙烯吡咯啉酮 (PVP)苦味酸体系作为测定钙镁含量指示剂 ,终点变色灵敏。应用于平炉渣、石灰石、白云石、水等样口中钙镁的测定 ,相对误差为± 0 .2 %左右 ,指示剂体系稳定 ,准确度和精密度较高更多还原

【Abstract】 The indicator for calcium or magnesium in complex metric titration is discussed.Acid chromc blue K naphthol green B PVP CoH 2(NO 2) 3OH system is established as the indicator,not only for detecting calcium and magnesium,but also for single calcium and determination.At the cnd,the color changes are sharp.It is convenient to observe.The new indicator is applied to the determination of calcium and magnesium in water,dolomite,limestone and so on.The analytical results of real samples fulfille the quality requirements.The indicator system is stable.The process is accurate and precise.更多还原