A novel turn-off strategy was developed for the melamine(Mel)detection based on melamine-Cu conjugate and subsequent interrupted the formation of AT-dsDNA copper nanoparticles(AT-dsDNA CuNPs).The coordination of melam...A novel turn-off strategy was developed for the melamine(Mel)detection based on melamine-Cu conjugate and subsequent interrupted the formation of AT-dsDNA copper nanoparticles(AT-dsDNA CuNPs).The coordination of melamine to copper cannot make the reduction of Cu^(2+)to Cu^(0)enough in the AT24-CuNPs synthesis process,and thereby results in the fluorescence intensity of CuNPs decreasing.Under the optimum conditions,the concentration of melamine showed a good linear relation with the fluorescence response of CuNPs in the range of 1~150μmol·L^(-1).The detection limit was 0.5μmol·L^(-1).Furthermore,good recov-eries were obtained while the proposed method was applied to the analysis of melamine in milk samples.展开更多
基金the NSF of China(21205035)Undergraduate Innovative Test Program of Hunan Institute of Technology(HX1630)
文摘A novel turn-off strategy was developed for the melamine(Mel)detection based on melamine-Cu conjugate and subsequent interrupted the formation of AT-dsDNA copper nanoparticles(AT-dsDNA CuNPs).The coordination of melamine to copper cannot make the reduction of Cu^(2+)to Cu^(0)enough in the AT24-CuNPs synthesis process,and thereby results in the fluorescence intensity of CuNPs decreasing.Under the optimum conditions,the concentration of melamine showed a good linear relation with the fluorescence response of CuNPs in the range of 1~150μmol·L^(-1).The detection limit was 0.5μmol·L^(-1).Furthermore,good recov-eries were obtained while the proposed method was applied to the analysis of melamine in milk samples.
