▎ 摘　　要

NOVELTY - Preparing a chiral graphene-polyaniline composite material involves adding 0.10-0.13g of L-(-) camphorsulfonic acid into 0.17-0.19g aniline, shaking and mixing, adding 8-12ml graphene oxide aqueous solution, mixing for 3-5 minutes to obtain graphene-aniline-camphorsulfonic acid suspension which is cooled to 0-5 degrees C in an ice bath. The 0.40-0.50g ammonium persulfate is dissolved in 3-7ml of distilled water to obtain a clear aqueous solution of ammonium persulfate. USE - Method for preparing a chiral graphene-polyaniline composite material for detecting electrochemical sensing enantiomer (claimed). ADVANTAGE - The method enables to prepare a chiral graphene-polyaniline composite material in simple manner. DETAILED DESCRIPTION - Preparing a chiral graphene-polyaniline composite material involves adding 0.10-0.13g of L-(-) camphorsulfonic acid into 0.17-0.19g aniline, shaking and mixing, adding 8-12ml graphene oxide aqueous solution, mixing for 3-5 minutes to obtain graphene-aniline-camphorsulfonic acid suspension which is cooled to 0-5 degrees C in an ice bath. The 0.40-0.50g ammonium persulfate is dissolved in 3-7ml of distilled water to obtain a clear aqueous solution of ammonium persulfate. The graphene-aniline-camphorsulfonic acid suspension is dropped to the ammonium persulfate solution in 3-5 minutes. The suspension changes from light green to brown. The resulting precipitate is washed with water, ethanol three times and drying to prepare chiral graphene-polyaniline composite material. An INDEPENDENT CLAIM is included for a method for using electrochemical sensing enantiomer, which involves: (A) preparing chiral graphene-polyaniline composite chiral sensor working electrode; (B) cleaning water and ethanol substrate electrode glassy carbon electrode surface; (C) dropping 6 mu l chiral graphene-polyaniline composite solution at room temperature to prepare chiral graphene-polyaniline composite modified chiral sensor working electrode; (D) mixing 3mg chiral graphene-polyaniline composite, 250 mu l isopropanol, 720 mu l water and 30 mu l Nafion for 10-15 minutes; (E) connecting reference electrode and the counter electrode to the electrochemical workstation, to obtain chiral graphene-polyaniline electrochemical chiral sensor, where reference electrode is a saturated calomel electrode, and the counter electrode is a platinum wire electrode; (F) testing methylbenzylamine enantiomer in phosphate buffered saline solution with pH 5.5; (G) determining value of standard solution at different concentrations; (H) drawing the enantiomeric reaction curves based on chiral graphene-polyaniline sensor; and (I) testing the samples for the content.