Highly Sensitive Detection of Trace Tetracycline in Water Using a Metal-Organic Framework-Enabled Sensor

Figure 6

Amperometric response of MIL-53 (Fe)/GCE to tetracycline (1.278 μmol/L) coexistent with different interfering substances (other antibiotics interferences with 10 times concentration (12.78 μmol/L): amoxicillin, ciprofloxacin, and norfloxacin. Typical organic interferences with 100 times concentration (127.8 μmol/L): phenol, hydroquinone, and catechol. Typical inorganic interferences with 100 times concentration (127.8 μmol/L): Ce³⁺, NO^3-, K⁺, Cl^-, Mn²⁺, Na⁺, and F^-). It was pair system that one interference coexistent with tetracycline in one test, and the DPV responses of the sensor to tetracycline were recorded. Other conditions were the same as described elsewhere. The DPV response of the sensor to bare tetracycline was set as the value of 100%.