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Lê Thị Hương Giang, Phạm Thị Thanh Nhàn, Nguyễn Mùa Xuân, Hoàng Thị Hoa, Nguyễn Thị Sơn, Đặng Minh Hương Giang, Bùi Xuân Thành, Tạ Thị Thảo, Nguyễn Thị Kim Thường, TA Thi Thao(1)

NGHIÊN CỨU CHẾ TẠO ĐIỆN CỰC GLASSY CARBON BIẾN TÍNH BẰNG GRAPHENE OXIDE DẠNG KHỬ VÀ ỨNG DỤNG PHÂN TÍCH AMARANTH TRONG MẪU KẸO BẰNG PHƯƠNG PHÁP VON-AMPE

FABRICATION OF REDUCED GRAPHENE OXIDE MODIFIED GLASSY CARBON ELECTRODE BY ELECTROCHEMICAL REDUCTION AND ITS DETERMINATION OF AMARANTH IN CANDY SAMPLES BY VOLTAMMETRY

Tạp chí Phân tích Hóa, Lý và Sinh học

2023

2

8

The glassy carbon electrode modified with reduced graphene oxide (ErGO/GCE) was fabricated by electrochemical reduction using cyclic voltammetry with conditions: graphene oxide 1 mg/mL, pH = 7: potential range from -1.5 V to 0 V. The ErGO/GCE was applied to determine amaranth in food with optimal conditions such as Britton-Robinson buffer pH 3.0, adsorption potential 0 V, adsorption time 30 s, scan rate 20 mV/s, linearity range from 1×10-7 mol. L-1to 1×10-6 mol. L-1, limit of detection 3×10-8 mol. L-1 and limit of quantification 10×10-8 mol. L-1. The proposed method was applied to determine amaranth in candy samples

The glassy carbon electrode modified with reduced graphene oxide (ErGO/GCE) was fabricated by electrochemical reduction using cyclic voltammetry with conditions: graphene oxide 1 mg/mL, pH = 7: potential range from -1.5 V to 0 V. The ErGO/GCE was applied to determine amaranth in food with optimal conditions such as Britton-Robinson buffer pH 3.0, adsorption potential 0 V, adsorption time 30 s, scan rate 20 mV/s, linearity range from 1×10-7 mol. L-1to 1×10-6 mol. L-1, limit of detection 3×10-8 mol. L-1 and limit of quantification 10×10-8 mol. L-1. The proposed method was applied to determine amaranth in candy samples