▎ 摘　　要

NOVELTY - The voltammentry has a vitamin release agent which is composed of a solvent and an inert supporting electrolyte. The convolution current voltammetry is used to detect the redox current generated by the vitamin in the blood sample to be tested on the modified working electrode. The corresponding concentration makes a standard curve by comparing the current signal value of a series of vitamin standard samples with different concentrations. The vitamin content in the test blood sample is calculated through a linear equation according to the current signal value generated by the test sample under the same conditions. The glassy carbon electrode is selected as the base electrode, and polishes and cleans the surface of the base electrode for use. The modification solution is composed of sulfuric acid, nitric acid, graphene, carbon nanotubes, sodium sulfate, sodium acetate, and potassium chloride. USE - Current voltammetry for simultaneous detection of vitamins A, D, and E. ADVANTAGE - The interference caused by the sample matrix effect is eliminated, detection limit of vitamin A, D, and E is lowered, and measurement result is accurate and reliable. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the linear equation curve corresponding to the detection of vitamin A. (Drawing includes non-English language text)