Fig. 6. Alcohol samples were mixed with AOx (50 U mL⁻¹). Then, NaAc–HAc buffer (200 mM, pH 3.6), TMB (40 mM), and Au@PtRu nanorods (20 μg mL⁻¹) were added into above solution. After incubating for 30 min, absorbance of each sample was recorded at 652 nm.