Study of brown sugar grade discrimination method based on electrochemical scanning techniques

Brown sugar grade discrimination method using a three-electrode electrochemical scanning system was proposed in this paper. Copper foam, nickel foam, and copper film were utilized as the working electrodes, respectively. Platinum electrode was used as the counter electrode, and saturated calomel electrode functioned as the reference electrode. Cyclic voltammetry (CV) and chronoamperometry (i-t) were used to scan brown sugar samples of different brands and grades in the aqueous environment. An evaluation method was constructed to discriminate the brown sugar samples using the detection data. Results revealed unique characteristics of different brown sugar samples when using different working electrodes. Logistic regression model was utilized to establish the relationship between the current density and variety of brown sugars utilizing i-t scanning data. Validation testing results demonstrated that the average relative error between theoretical and actual current densities was within ±9.27 %, confirming its effectiveness for the discrimination of different grades of brown sugar. •An electrochemical system effectively discriminated various brown sugar samples.•Cyclic voltammetry (CV) and chronoamperometry (i-t) can discriminate the grade of brown sugar.•The logistic regression model effectively distinguishes various brown sugar grades.•The model's average relative error ranges from 2.65 % to 9.27 %.