Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie Sklodowska University, 20-031 Lublin, Poland.
Molecules. 2024 Sep 20;29(18):4464. doi: 10.3390/molecules29184464.
This article presents for the first time a new working electrode with a long service life- the bismuth-plated array of carbon composite microelectrodes for the simple, fast and sensitive determination of quercetin by adsorptive stripping voltammetry. The main experimental conditions were selected. The calibration graph was linear from 1 × 10 to 2 × 10 mol L with an accumulation time of 60 s. The detection limit was equal to 4.8 × 10 mol L. The relative standard deviation for 2 × 10 mol L of quercetin was 4.4% (n = 7). Possible interference effects resulting from the presence of other organic and surface active compounds and interfering ions were studied. The developed procedure was successfully applied to determine quercetin in pharmaceutical preparations and the spiked urine samples.
本文首次提出了一种新的工作电极，即镀铋的碳复合微电极阵列，用于通过吸附溶出伏安法简单、快速和灵敏地测定槲皮素。选择了主要的实验条件。在 60s 的积累时间内，校准曲线从 1×10 到 2×10 摩尔 L 呈线性。检测限等于 4.8×10 摩尔 L。对于 2×10 摩尔 L 的槲皮素，相对标准偏差为 4.4%（n = 7）。研究了可能存在的其他有机和表面活性剂化合物以及干扰离子的干扰影响。所开发的程序成功地应用于测定药物制剂和加标尿液样品中的槲皮素。
