▎ 摘　　要

NOVELTY - Determining K+ by catalytic tetragonal boron oxide ligand-controlled graphene oxide nanoribbons with a catalytic activity resonance scattering spectrometry comprises preparing a known concentration of K + standard solution system by adding e. g. K + standard solution into test tube, reacting, cooling, adding sodium chloride and double distilled water, preparing blank control solution system, taking delta I as a working curve for the concentration of K +, where the K + standard solution added is replaced by the sample solution, measuring the sample solution and calculating delta I sample. USE - The method is useful for determining K+ by catalytic tetragonal boron oxide ligand-controlled graphene oxide nanoribbons with a catalytic activity resonance scattering spectrometry (claimed). ADVANTAGE - The method is simple, fast and high sensitivity. DETAILED DESCRIPTION - Determining K+ by catalytic tetragonal boron oxide ligand-controlled graphene oxide nanoribbons with a catalytic activity resonance scattering spectrometry comprises preparing a known concentration of K + standard solution system by adding 10-400 mu l 10 mu mol/l of K + standard solution, 100-180 mu l 47.5 ng/ml graphene nano ribbons, 300-500 mu l 10 mu mol/l sodium tetraphenylborate solution, 30-100 mu l of 0.3 mol/l glucose, 100-200 mu l 1 mmol/l silver nitrate and 10-50 mu l 0.5 mol/l sodium hydroxide solution into test tube, reacting in a water bath at 60 degrees C for 5 minutes, shaking well, cooling in a ice-water to room temperature, adding 80-150 mu l 1 mol/l sodium chloride and 2 ml double distilled water, (b) preparing blank control solution system by using the method of step (a) without K + standard solution to prepare blank control solution system, (c) taking steps (a), prepared K + standard solution system and blank control solution system into the quartz cuvette, using the fluorescence spectrophotometer, setting the instrument parameters, scanning the resonance scattering spectrum of the system, where the resonance scattering peak intensity at 420 nm was determined as I, simultaneous determination of the blank control solution system resonance scattering peak intensity value I0, calculating delta I is equal to I-I0, (d) taking delta I as a working curve for the concentration of K +, (e) A sample solution was prepared according to the method of step (a) where the K + standard solution added is replaced by the sample solution, according to the method of step (c), measuring the sample solution for the resonance scattering peak intensity value I sample, calculating delta I sample is equal to I sample-I0, and (f) according to the working curve of step (d) calculating the content of the sample solution K +.