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首页> 外文期刊>Electroanalysis >A comparison of the properties of contactless conductivity and diode-array photometric detectors in analyses of low-molecular, biologically active substances by capillary electrophoresis in acetic acid solutions
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A comparison of the properties of contactless conductivity and diode-array photometric detectors in analyses of low-molecular, biologically active substances by capillary electrophoresis in acetic acid solutions

机译：非接触电导率和二极管阵列光度检测器在醋酸溶液中通过毛细管电泳分析低分子生物活性物质的性能比较

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摘要

The performance of the contactless conductivity (CD) and diode array photometric (DAD) detectors has been compared for CE separations of creatinine, arginine and 3-methylhistidine in acetic acid background electrolytes. The contactless conductivity detector response has also been modeled. It has been found that the two detectors provide similar responses and can readily be used for dual CE detection. Changes in the acetic acid concentration affect the (CD)-D-4 noise less than the DAD noise, but their effect on the (CD)-D-4 response to the analytes is greater than with DAD. In general, (CD)-D-4 provides better detection results at higher acetic acid concentrations, while DAD is more sensitive and reliable at very low ones. Capillaries with greater internal diameters are preferable for both detectors, provided that the separation efficiency is not adversely affected. Acetic acid is a suitable background electrolyte for CE separations of small, basic organic molecules.
机译：非接触式电导率（CD）和二极管阵列光度（DAD）检测器的性能已在乙酸背景电解质中进行肌酐，精氨酸和3-甲基组氨酸的CE分离中进行了比较。非接触式电导检测器的响应也已建模。已经发现，两个检测器提供相似的响应并且可以容易地用于双重CE检测。乙酸浓度的变化对（CD）-D-4噪声的影响小于对DAD噪声的影响，但它们对（CD）-D-4对分析物的响应的影响要大于对DAD的影响。通常，（CD）-D-4在较高的乙酸浓度下可提供更好的检测结果，而在非常低的浓度下DAD更为灵敏和可靠。内径较大的毛细管对于两个检测器都是可取的，只要不对分离效率产生不利影响。乙酸是用于CE分离小的碱性有机分子的合适背景电解质。

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