“…Currently, a variety of methods for detecting tetracycline such as high-performance liquid chromatography, 7 capillary electrophoresis, 8 mass spectrometry, 9 colorimetry, 10 fluorescence 11 and photoelectrochemical 12 methods have been reported. These methods present high sensitivity and accuracy, but still there exist some drawbacks such as requirement of expensive equipment or complicated sample pretreatment procedures.…”