Although the electrokinetic injection mode is applicable for direct introduction of ionic components from highly viscous samples, this is the first work which studies this special feature of capillary electrophoresis for this purpose. 9 metal cations were determined in honey utilizing direct injection, zone electrophoretic separation and indirect UV detection of the sample components. Reproducibility better than 4 RSD% was found for peak areas and the LOD values ranged between 0.045 and 0.44 mg/kg when injection parameters were set to 7.5 kV × 5 s. In order to remedy the quantitation problems arising from mobility and matrix bias, the applicability of the internal universal calibration was examined. It was found that in cases where the mobilities of cations do not differ from the mobilities of the monitoring ion and the internal universal standard (IUS) by more than 10%, the obtained results agreed well with the data measured with ICP-OES.

中文翻译：

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使用毛细管电泳和电动注射分析蜂蜜-直接分析粘性样品，而无需样品预处理。

尽管电动进样方式适用于直接从高粘度样品中引入离子成分，但这是为此目的研究毛细管电泳这一特殊功能的第一项工作。利用直接进样，区域电泳分离和样品成分的间接UV检测，在蜂蜜中测定了9种金属阳离子。当进样参数设置为7.5 kV×5 s时，峰面积的重现性优于4 RSD％，LOD值在0.045至0.44 mg / kg之间。为了解决由于迁移率和基质偏差引起的定量问题，对内部通用校准的适用性进行了研究。