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
A new method of differential thermal analysis and instrument were developed. The solution and pure solvent were placed in a cooling bath whose temperature was decreased by a semiconductor chip. Three detectors were us...A new method of differential thermal analysis and instrument were developed. The solution and pure solvent were placed in a cooling bath whose temperature was decreased by a semiconductor chip. Three detectors were used to sense the temperature (Ts, Tr and Tw) of solution (S), pure solvent (R) and cooling bath (W). When (Tr-Ts)-(Ts-Tw)presented maximum, (Tr-Ts) was the freezing point depression of the solution which was proportional to the concentration of solution. An instrument for the method was designed.展开更多
A novel electromagnetic induction detector with two inductors for CE was described here.The two inductors were used as signal detection and reference,respectively.The parameters affecting the detector performance（inc...A novel electromagnetic induction detector with two inductors for CE was described here.The two inductors were used as signal detection and reference,respectively.The parameters affecting the detector performance（including coil turns,detection distance, excitation frequency,voltage,etc.） were optimized.Under the optimum condition,the feasibility of the detector was examined by analyzing inorganic ions.The fabricated detector showed good linear relationship between the response and the analytes concentrations,with a detection limit of 13μmol/L for Na~＋（S/N = 3）.A variety of advantages,such as simple construction, ease of operation,and considerably universal response,suggested this novel detector a promising application prospect in analytical area.展开更多
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.
文摘A new method of differential thermal analysis and instrument were developed. The solution and pure solvent were placed in a cooling bath whose temperature was decreased by a semiconductor chip. Three detectors were used to sense the temperature (Ts, Tr and Tw) of solution (S), pure solvent (R) and cooling bath (W). When (Tr-Ts)-(Ts-Tw)presented maximum, (Tr-Ts) was the freezing point depression of the solution which was proportional to the concentration of solution. An instrument for the method was designed.
基金support from the National Natural Science Foundation of China(Nos20727006 and 21075139)
文摘A novel electromagnetic induction detector with two inductors for CE was described here.The two inductors were used as signal detection and reference,respectively.The parameters affecting the detector performance（including coil turns,detection distance, excitation frequency,voltage,etc.） were optimized.Under the optimum condition,the feasibility of the detector was examined by analyzing inorganic ions.The fabricated detector showed good linear relationship between the response and the analytes concentrations,with a detection limit of 13μmol/L for Na~＋（S/N = 3）.A variety of advantages,such as simple construction, ease of operation,and considerably universal response,suggested this novel detector a promising application prospect in analytical area.
