| occurrence and risk assessment of antibiotics in river water in hong kong. | the occurrence and distribution of six typical antibiotics in the main rivers of hong kong were investigated using high-performance liquid chromatography electrospray ionization tandem mass spectrometry (hplc-es-ms/ms). the results revealed that the antibiotics were widely distributed in the area studied. of the target antibiotics, ofloxacin was the most frequently detected in the rivers, with a detection rate of 69.6% and a median concentration of 0.7ng/l. sulfadimidine (n.d-580.4ng/l) and doxy ... | 2016 | 26685784 |