Method for determining total amount of nickel, cobalt and aluminum and amounts of nickel, cobalt and aluminum in NCA material

Abstract

The application discloses a method for determining the total amount of nickel, cobalt and aluminum and the amounts of nickel, cobalt and aluminum in NCA materials. 2+ 2+ 3+ The method comprises the following steps: (1) mixing a to-be-measured solution containing Ni 2+ , Co 2+ and Al 3+ prepared from NCA materials with an excess EDTA standard solution and a first buffer solution and heating to obtain a first mixed solution; (2) mixing the first mixed solution with a second buffer solution and heating to obtain a second mixed solution; (3) using zinc standard titration solution to titrate the excess EDTA in the second mixed solution with dimethyl phenol orange as an indicator, and adding the second buffer solution again when approaching the titration end point to maintain the pH of the reaction system at 5-6 at the titration end point, so as to quantitatively titrate the total amount of nickel, cobalt and aluminum. The method can quickly, accurately and stably determine the total amount of nickel, cobalt and aluminum and the amounts of nickel, cobalt and aluminum in the NCA materials, thereby meeting the demand for timely monitoring and ensuring the accuracy.

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