▎ 摘　　要

NOVELTY - Pre-processing graphene conductive slurry comprises adding concentrated nitric acid into the graphene conductive paste sample, heating for the first time, carrying out secondary digestion, adding perchloric acid, secondary heating and secondary digesting, adding aqua regia, heating, digesting and boiling for three times, filtering to a constant volume and cooling. USE - The method is useful for detecting metal element content in the graphene conductive slurry (claimed). ADVANTAGE - The method utilizes the strong oxidation property of concentrated nitric acid and perchloric acid and decompose the organic substance in graphene conductive paste to avoids the influence of the organic substance and has rapid effect. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) detecting graphene conductive paste of metal element content, comprising (i) carrying out pretreatment for detecting the metal element content of the graphene conductive paste, (ii) taking the standard mass fraction of 1000 mg/l metal ion stock solution and configured as a standard series of different concentration gradient solution, using flame atomic absorption spectrometry to determine the absorbance corresponding to the standard series of solutions of metal ions with different concentration gradients, and taking the concentration of metal ion standard solution as abscissa, and standard solution of metal ions corresponding to the absorbance of the vertical axis, making a standard curve of the metal ion, (iii) taking same concentrated nitric acid as in step (i), mixing perchloric acid and aqua regia, setting the volume of reagent blank solution, taking obtained graphene conductive paste pretreatment samples of step (i) and reagent blank solution for detection of absorbance, according to the standard curve obtained in step (ii) and metal ions in the sample to obtain the metal ion content; and (2) use of method for detecting metal element content in the graphene conductive paste comprising detecting and analyzing the content of iron, nickel or cobalt in the graphene conductive paste.