固体钙指示剂的配比研究

研究固体钙指示剂的最佳配制比例,对不同配比的固体钙指示剂在一定条件下测定钙离子的实验结果进行比较.实验结果表明：固体钙指示剂的最佳配比是钙指示剂与氯化钠的质量比为1∶100,此比例下终点变色敏锐,准确度显著提高,稳定性好.在该配比下测定了样品的含量,其回收率在99.9%～107.7%的范围内,相对标准偏差在1.53%以内,测定结果与用国家标准方法所测结果一致.该方法可用于测定含钙试样,对产品质量进行监控.

Study on the Ratio of Solid Calcium Indicator

To study the best ratio of solid calcium indicator.Experimental results under certain conditions have been compared from the determination of calcium iron with different ratio solid calcium indicator.Experimental results showed that the best mass ratio was 1:100 of solid calcium indicator and sodium chloride.At this ratio the sharp color changed in end point,the accuracy was significantly improved.This method has been applied to the determination of calcium sample with satisfactory result.The determination results was the same as national standard method consistent with the recovery of 99.9%~107.7% RSD was less than 1.53%.So this method can be used to determine the calcium sample and monitor the quality products.