磷酸亚铁锂碳复合物中碳、铁、磷含量的测定

Determination of Carbon, Iron and Phosphorus Content of LiFePO4/C Composite

中文关键词:  LiFePO4/C复合物  重量法  容量法  分光光度法

英文关键词:LiFePO4/C composite  Gravimetric method  Titrimetric method  Spectrophotometry method

中文摘要:

      采用重量法测定了自制磷酸亚铁锂碳复合物中的碳含量，且将碳过滤分离后，制得了样品溶液，用来测定其中的元素含量。采用EDTA络合滴定法和邻菲哆啉分光光度法测得铁离子质量分敖分别为33．88％、33．77％，测定的RSD分别为0．1％、0．6％。两种方法的测定结果很接近，但是通过F检验法得到EDTA络合滴定法的精密度显著高于邻菲啰啉分光光度法的精密度。采用磷钼酸喹啉重量法和磷钒钼黄光度法测得磷的质量分数分别为19．22％、19．36％，测定的RSD为1．81％、1．89％。两种方法的测定结果很接近。通过F检验法发现两种方法的精密度不存在显著性差异，通过t检验法发现两种方法在置信度为90％时，不存在显著性差异。

英文摘要:

      The authors determinated carbon content of LiFeP04/C composite by gravimetric method, and got sample solution for determination element content of LiFePO4/C composite after removing carbon. The iron content is 33.88% and 33.77% respectively by EDTA titrimetric and spectrophotometry method,of which RSD is 0. 1% and 0. 6% respectively. The distinction of the two result is small, but the experi- ment precision of EDTA titrimetric method is remarkable higher than spectrophotometry method by F-test method. Additionally, the phosphorus content is 19.22% and 19.36% respectively by gravimetrie method and spectrophotometry method,of which RSD is 1.81% and 1.89% respectively. The distinction of the two result is small, the experiment precision of gravimetric method and spectrophotometry method is not distinct by F-test, and is not distinct by t-test（ α =0. 10） as well.