▎ 摘　　要

NOVELTY - Sodium tetraphenylborate ligand oxidation graphene nano belt catalytic active surface enhanced Raman spectrum determination of potassium ion comprises e.g. preparing known concentrations of potassium ion standard solution system: adding orderly 10-600 mu mol/l of 10 mu mol/l potassium ion standard solution in graduated test tube, 100-180 mu l of 47.5 ng/ml graphene oxide nano-belt, 300-500 mu mol/l 10 mu mol/l sodium tetraphenylborate solution, 30-100 mu l of 0.3 mol/l glucose, 100-200 mu l of 1 mmol/l silver nitrate, 10-50 mu l of 0.5 mol/l sodium hydroxide solution, and reacting. USE - The method is useful for sodium tetraphenylborate ligand oxidation graphene nano belt catalytic active surface enhanced Raman spectrum determination of potassium ion (claimed). ADVANTAGE - The method: is simple; and has high sensitivity. DETAILED DESCRIPTION - Sodium tetraphenylborate ligand oxidation graphene nano belt catalytic active surface enhanced Raman spectrum determination of potassium ion comprises (1) preparing known concentrations of potassium ion standard solution system: adding orderly 10-600 mu mol/l of 10 mu mol/l potassium ion standard solution in the graduated test tube, 100-180 mu l of 47.5 ng/ml graphene oxide nano-belt, 300-500 mu mol/l 10 mu mol/l sodium tetraphenylborate solution, 30-100 mu l of 0.3 mol/l glucose, 100-200 mu l of 1 mmol/l silver nitrate, 10-50 mu l of 0.5 mol/l sodium hydroxide solution, reacting for 5 minutes in water bath at 60 degrees C, shaking and ice-water cooling to room temperature, adding 20-80 mu l of 10 mu mol/l victoria blue 4r solution, namely VB4r and 80-150 mu l 1 mol/l sodium chloride, preparing the blank comparison solution system to 2 ml, (2) secondary distilled water: using the method of step (1) preparing standard solution without adding potassium ion blank control solution system, (3) preparing of potassium ion standard solution system and the blank control solution system into quartz cuvette on the Raman spectrograph, setting instrument parameter, scanning Raman spectrum to obtain surface enhanced system, measuring the surface 1615 cm-1 of enhanced Raman peak intensity value is I, simultaneously measuring the blank control surface enhanced Raman peak intensity value of the solution system is I0, calculating Delta I=I-I0, (4) working curve of the concentration relation of the potassium ion Delta I, (5) according to the method of step (1) preparing the sample solution, where the addition of potassium ion standard solution as the sample solution, and detecting according to the method of step (3) to the surface enhanced Raman peak intensity value of the sample solution as I sample, calculating Delta I sample = sample I-I0, (6) working curve according to step (4), calculating content of the sample solution potassium ion.