Study On The Electrochemical Detection Of Antibacterial Materials

In this dissertation,two simple,rapid and sensitive electrochemical methods have been developed to detect chloramine-T and sodium dehydroacetate,respectively.It is of great significance in the field of environmental analysis and food safety testing.A method for the amperometric determination of chloramine-T has been developed.The process is based on the indirect detection of chloramine-T through detecting p-quinone imine generated from the oxidation of p-aminophenylboronic acid by chloramine-T.As it is easy to detect p-quinone imine at low potential with bare glassy carbon electrode,the sensor displays satisfactory analytical performance,such as high sensitivity,wide detection range and excellent selectivity.The sensor shows two linear responses over the range of 50 nM to 100 ?M with the detection limits of 6 nM for chloramine-T.Compared with other electrochemical analysis methods,the proposed sensor improves the sensitivity by about three orders of magnitude.Sodium dehydroacetate,a common food additive and preservative,has been successfully explored as an efficient electrochemiluminescence coreactant of Ru(bpy)32+.It shows two linear electrochemiluminescence responses over the range of 1.0 ?M-1.0 mM sodium dehydroacetate with a detection limit of 0.27 ?M.The proposed strategy has been applied to detect sodium dehydroacetate in baking bread with satisfactory recoveries.