摘要
对于1gK＇_(My)C_M或1gK＇_(MY)C_M -1gK＇_(NY)C_N较小的络合滴定,可以使用单一参比溶液,使全部试样的pMeq均大于或小于该参比溶液的PM值,并使用数据校正法或条件滴定度法校正结果。实验证明,即使1gK＇_(MY)C_M或1gK＇_(MY)C_M -1gK＇_(NY)C_N小至4,仍能得精确结果。
In complexometric titration, if the IgK＇(MY)_C_M or IgK＇(MY)_C_M -JgK＇(NY)_C_N is low, the accuracy and the end point of detection can be improved with the help of using a reference solution. If only one reference solution is used in the determination of many sample solutions with large different concentration, such a reference solution may be selected with its indicator colour having a pM smaller or larger than all those pM_(e q)of the sample solutions, and the results are corrected with two methods. The one, as the results of all samples have the same value deviation, The data correction method can be used to give a certain correction value. The other, as the results have same per cent deviation, the conditional titre method can be used. Two methods are studied theoretically and verified experimentally. It is proved that even though the ]gK＇(MY)_C_M or lgK＇(MY)_C_M-lgK＇(NY)_C_N is as low as 4,accurate results are obtained.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1990年第2期170-173,共4页
Chinese Journal of Analytical Chemistry
关键词
络合滴定
校正方法
Complexometric titration
Correction method
