This work describes three crown ether-coated piezoelectric crystal sensors for detection of carboxylic acid vapours. All three have excellent reproducibility and stability (lasting for at least 100 days). Two of them ...This work describes three crown ether-coated piezoelectric crystal sensors for detection of carboxylic acid vapours. All three have excellent reproducibility and stability (lasting for at least 100 days). Two of them show good sensitivity (137-1500Hz/mg/L) and high selectivity. Cis-diaminodibenzo-18-crown-6 can be used as the coating material for the detection of formic acid. The effect of crown ethers structure on the detection sensitivity and selectivity for acid vapours was discussed展开更多
A new conductivity detector for capillary electrophoresis consisting of an electrochemical cell and a conductive meter was developed. In the cell, the microelectrode and capillaryd were inserted through the cell wall ...A new conductivity detector for capillary electrophoresis consisting of an electrochemical cell and a conductive meter was developed. In the cell, the microelectrode and capillaryd were inserted through the cell wall and fixed by screws and sealing ring, the ends of microelectrode: and capillary were located by a guide with two cross holes. LOD for K+ was 1.5 x 10(-5) mol/L.展开更多
文摘This work describes three crown ether-coated piezoelectric crystal sensors for detection of carboxylic acid vapours. All three have excellent reproducibility and stability (lasting for at least 100 days). Two of them show good sensitivity (137-1500Hz/mg/L) and high selectivity. Cis-diaminodibenzo-18-crown-6 can be used as the coating material for the detection of formic acid. The effect of crown ethers structure on the detection sensitivity and selectivity for acid vapours was discussed
基金This research was Supported partially by the National Natural Science Foundation of China!(Grant No.2967>033 ). We also thank e
文摘A new conductivity detector for capillary electrophoresis consisting of an electrochemical cell and a conductive meter was developed. In the cell, the microelectrode and capillaryd were inserted through the cell wall and fixed by screws and sealing ring, the ends of microelectrode: and capillary were located by a guide with two cross holes. LOD for K+ was 1.5 x 10(-5) mol/L.
