论文部分内容阅读
将亚甲绿混合在碳糊中制成化学修饰电极对肾上腺素（Ｅｐ）的氧化具有良好的电催化作用，降低Ｅｐ氧化过电位４００ｍＶ。该电极用于流动注射分析（ＦＩＡ）能大大提高Ｅｐ的检测灵敏度。其线性范围为１．０×１０７～５．０×１０４ｍｏｌ／Ｌ；检测限为１．０×１０８ｍｏｌ／Ｌ（０．２５ｐｍｏｌ，Ｓ／Ｎ＝３）。经过６ｄ连续测定，响应值仅下降 １８％。
Mixing methylene green in carbon paste to make chemically modified electrode has good electrocatalytic activity for the epoxidation of epinephrine (Ep), and decreases Ep oxidation potential of 400mV. The electrode for flow injection analysis (FIA) can greatly improve the detection sensitivity of Ep. The linear range was 1.0 × 107 ~ 5.0 × 104mol / L. The detection limit was 1.0 × 108mol / L (0.25pmol, S / N = 3). After 6 days of continuous measurement, the response value decreased only 18%.