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本文首次采用碳纤维微电极制成流通式的电化学检测器,与常规的液相色谱柱连接,做成一个方便、灵敏和简单的液相色谱安培检测器。图1为其结构示意图。由于电极直径只有30μm,必须采用干电池为电源,并屏蔽检测系统,以降低外界噪声干扰,利用自制的高灵敏电流检测装置,可在高于10~(-12)A电流范围内检测。用去甲肾上腺素(NE)、肾上腺素(E)、多巴胺(DA)、对苯二酚
For the first time, a flow-through electrochemical detector made of carbon fiber microelectrode was used to connect with a conventional liquid chromatography column to make it a convenient, sensitive and simple liquid chromatographic amperometric detector. Figure 1 is a schematic diagram of the structure. Since the diameter of the electrode is only 30μm, a dry cell battery must be used as the power supply and the detection system must be shielded to reduce external noise interference. The self-made high sensitive current detection device can be used to detect current higher than 10 ~ (-12) A. Norepinephrine (NE), epinephrine (E), dopamine (DA), hydroquinone