Recently,lanthanide-doped polyoxometalates have garnered significant attention as optical nanosensors.In this study,a novel fluorescence sensing platform for phytic acid detection based on fluorescence quenching was d...Recently,lanthanide-doped polyoxometalates have garnered significant attention as optical nanosensors.In this study,a novel fluorescence sensing platform for phytic acid detection based on fluorescence quenching was developed.The tungsten europium heteropolyoxometalate Na_(9)EuW_(10)O_(36)was prepared under mild conditions,emitting characteristic emission peaks of europium ions at 556,591,618,649,and 700 nm.The fluorescence sensing of phytic acid by Na_(9)EuW_(10)O_(36)was achieved based on the action of static quench.The linear range of the method for the detection of phytic acid was 1-100μmol·L^(-1)with a linear equation of the relative fluorescence intensity F_(0)/F=0.0256[c(PA)]+0.9489(R^(2)=0.9930),and the detection limit of 0.51μmol·L^(-1).The detection of phytic acid in aquatic products was achieved through spiked tests on Litopenaeus vannamei and frozen Larimichthys with recoveries ranging from 96.68%to 116.04%,and the relative standard deviation is less than 6%,indicating the strong application potential.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.22271119)。
文摘Recently,lanthanide-doped polyoxometalates have garnered significant attention as optical nanosensors.In this study,a novel fluorescence sensing platform for phytic acid detection based on fluorescence quenching was developed.The tungsten europium heteropolyoxometalate Na_(9)EuW_(10)O_(36)was prepared under mild conditions,emitting characteristic emission peaks of europium ions at 556,591,618,649,and 700 nm.The fluorescence sensing of phytic acid by Na_(9)EuW_(10)O_(36)was achieved based on the action of static quench.The linear range of the method for the detection of phytic acid was 1-100μmol·L^(-1)with a linear equation of the relative fluorescence intensity F_(0)/F=0.0256[c(PA)]+0.9489(R^(2)=0.9930),and the detection limit of 0.51μmol·L^(-1).The detection of phytic acid in aquatic products was achieved through spiked tests on Litopenaeus vannamei and frozen Larimichthys with recoveries ranging from 96.68%to 116.04%,and the relative standard deviation is less than 6%,indicating the strong application potential.
