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首页> 外文期刊>Журнал аналитической химии >New ampero-coulometric detector for microscale high-performance liquid chromatography
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New ampero-coulometric detector for microscale high-performance liquid chromatography

机译：用于微量高效液相色谱的新型安培库仑检测器

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摘要

The volume dispersion of a voltammetric measurement cell with a radial eluant flow around the working electrode designed for microscale high-performance liquid chromatography (HPLC) is studied. The detector signal is studied the volumetric elution rate and as a function of the distance between the working and auxiliary electrodes. For elution rates lower than 4.4 #mu#L/min, the electrochemical conversion coefficient is 100%. For a distance of 20 #mu#m, the dispersion is 0.004 #mu#L~2. The dynamic range spans no less than four orders of magnitude, and the detection limit of noradrenaline is 2 fmol. The advantages of microscale HPLC with the electrochemical detector proposed are discussed. It is shown that the detector can be used in clinical and biochemical tests for the quantitative determination of catecholamines and amino acids in body fluids.
机译：研究了在用于微型高效液相色谱（HPLC）的工作电极周围具有径向洗脱液流动的伏安测量池的体积分散。研究检测器信号的体积洗脱速率，并作为工作电极与辅助电极之间距离的函数。如果洗脱速率低于4.4＃mu＃L / min，则电化学转化系数为100％。对于20＃mu＃m的距离，色散为0.004＃mu＃L〜2。动态范围跨度不小于四个数量级，去甲肾上腺素的检出限为2 fmol。讨论了采用电化学检测器的微型HPLC的优点。结果表明，该检测器可用于临床和生化检测中，用于定量测定体液中的儿茶酚胺和氨基酸。

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