通过考察电极长度及电极间距、检测管管径及材质、激励信号频率、电压和波形等参数对信噪比的影响,研制了一种适用于常规型离子色谱系统的电容耦合非接触式电导检测器(C^4D)。在抑制模式下,该检测器对常见无机阴离子(F^-、Cl^-、NO_2^-...通过考察电极长度及电极间距、检测管管径及材质、激励信号频率、电压和波形等参数对信噪比的影响,研制了一种适用于常规型离子色谱系统的电容耦合非接触式电导检测器(C^4D)。在抑制模式下,该检测器对常见无机阴离子(F^-、Cl^-、NO_2^-、Br^-、NO_3^-和SO_4^(2-))的检出限(信噪比=3)为0.02~0.08μmol/L;峰面积的相对标准偏差<1.8%(n=6);在0.1~10μm o l/L范围内上述6种无机阴离子线性关系良好,相关系数(R^2)>0.999。自制C4D的主要性能参数与商品化接触式电导检测器相当。该检测器具有结构简单、成本低廉、无电极污染等优点,有利于拓展离子色谱的应用范围。展开更多
Recent interest in mobile-based heahhcare has driven significant demands on researching non-contact electrodes for electrocardiogram （ECG） measurement. While the conductive gel achieves the requirement in making a g...Recent interest in mobile-based heahhcare has driven significant demands on researching non-contact electrodes for electrocardiogram （ECG） measurement. While the conductive gel achieves the requirement in making a good contact between the electrodes and skin, several problems appear. A gel-free, non-contact electrode based on capacitive coupling theory was provided in this paper, which was integrated on the print circuit board （PCB）. The experimental results showed that clear ECG signals could be acquired in the laboratory conditions by coupling the electrodes to the chest of patients through cotton belts.展开更多
文摘通过考察电极长度及电极间距、检测管管径及材质、激励信号频率、电压和波形等参数对信噪比的影响,研制了一种适用于常规型离子色谱系统的电容耦合非接触式电导检测器(C^4D)。在抑制模式下,该检测器对常见无机阴离子(F^-、Cl^-、NO_2^-、Br^-、NO_3^-和SO_4^(2-))的检出限(信噪比=3)为0.02~0.08μmol/L;峰面积的相对标准偏差<1.8%(n=6);在0.1~10μm o l/L范围内上述6种无机阴离子线性关系良好,相关系数(R^2)>0.999。自制C4D的主要性能参数与商品化接触式电导检测器相当。该检测器具有结构简单、成本低廉、无电极污染等优点,有利于拓展离子色谱的应用范围。
文摘Recent interest in mobile-based heahhcare has driven significant demands on researching non-contact electrodes for electrocardiogram （ECG） measurement. While the conductive gel achieves the requirement in making a good contact between the electrodes and skin, several problems appear. A gel-free, non-contact electrode based on capacitive coupling theory was provided in this paper, which was integrated on the print circuit board （PCB）. The experimental results showed that clear ECG signals could be acquired in the laboratory conditions by coupling the electrodes to the chest of patients through cotton belts.
