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
A method for determination of iodide in complex matrix-acetic acid,glacial acetic acid and acetic anhydride was established using high performance anion exchange chromatography with pulsed amperometric detector(HPAEC-...A method for determination of iodide in complex matrix-acetic acid,glacial acetic acid and acetic anhydride was established using high performance anion exchange chromatography with pulsed amperometric detector(HPAEC-PAD).Using 200 mmol/Lnitric scid solution as mobile phase,iodide can be separated within 10 min on high hydrophilic IonPac AS16 column.The relative standard deviation(RSD)of 20μg/L iodide standard solution prepared in industrial acetic acid,glacial acetic acid and acetic anhydride was 1.8%,11.5% and 8.0%,separately.The detection limit was 0.02,0.04μg/L,separately(500μg injection,3 times of signal to moise ratio).The proposed method was applied for determination of iodide in real samples,noiodide was detected and the recovery was ranging from 85 to 111%?This method has asvantages of simplicity to prepare the samples,no inteference and high sensitivity,etc.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A method for determination of iodide in complex matrix-acetic acid,glacial acetic acid and acetic anhydride was established using high performance anion exchange chromatography with pulsed amperometric detector(HPAEC-PAD).Using 200 mmol/Lnitric scid solution as mobile phase,iodide can be separated within 10 min on high hydrophilic IonPac AS16 column.The relative standard deviation(RSD)of 20μg/L iodide standard solution prepared in industrial acetic acid,glacial acetic acid and acetic anhydride was 1.8%,11.5% and 8.0%,separately.The detection limit was 0.02,0.04μg/L,separately(500μg injection,3 times of signal to moise ratio).The proposed method was applied for determination of iodide in real samples,noiodide was detected and the recovery was ranging from 85 to 111%?This method has asvantages of simplicity to prepare the samples,no inteference and high sensitivity,etc.
