A capillary zone electrophoresis method was developed for determination of melamine in food samples, such as quail egg and milk products. The CE procedure was performed on fused silica capillary (41 cm × 75 μm I...A capillary zone electrophoresis method was developed for determination of melamine in food samples, such as quail egg and milk products. The CE procedure was performed on fused silica capillary (41 cm × 75 μm I.D.) at 17 kV using pH3.1 60mmol/L phosphate buffer as run buffer and detecting at 200 nm. The proposed method showed good linearity (0.5 - 10.0 μmol/L) and low LOD (0.5 μmol/L) with good reproducibility (RSD% was 2.4 and 3.2 for migration time and peak area respectively), which made it suitable for quantity control of the related food product.展开更多
A convenient and environmentally friendly synthetic route from 2-vinylbenzimide to 3-hydroxy-isoindolinones through visible light-promoted transformations via iron/disulfide catalysis and molecular oxygen oxidation ha...A convenient and environmentally friendly synthetic route from 2-vinylbenzimide to 3-hydroxy-isoindolinones through visible light-promoted transformations via iron/disulfide catalysis and molecular oxygen oxidation has been developed.A range of 3-hydroxy-isoindolinones was obtained in moderate to good yields,which exhibit excellent functional group compatibility and broad substrate scope.Further mechanistic investigations proved that dioxetane might be a key intermediate being involved in the reaction.展开更多
文摘A capillary zone electrophoresis method was developed for determination of melamine in food samples, such as quail egg and milk products. The CE procedure was performed on fused silica capillary (41 cm × 75 μm I.D.) at 17 kV using pH3.1 60mmol/L phosphate buffer as run buffer and detecting at 200 nm. The proposed method showed good linearity (0.5 - 10.0 μmol/L) and low LOD (0.5 μmol/L) with good reproducibility (RSD% was 2.4 and 3.2 for migration time and peak area respectively), which made it suitable for quantity control of the related food product.
基金supported by the National Natural Science Foundation of China(grant no.21776130,21878145 and 22078150).
文摘A convenient and environmentally friendly synthetic route from 2-vinylbenzimide to 3-hydroxy-isoindolinones through visible light-promoted transformations via iron/disulfide catalysis and molecular oxygen oxidation has been developed.A range of 3-hydroxy-isoindolinones was obtained in moderate to good yields,which exhibit excellent functional group compatibility and broad substrate scope.Further mechanistic investigations proved that dioxetane might be a key intermediate being involved in the reaction.
