Guo Ziying, Feng Feng, Hou Yanxia, Jaffrezic-Renault Nicole
Department of Chemistry, Yanbei Normal Institute, Datong 037000, PR China.
Talanta. 2005 Feb 28;65(4):1052-5. doi: 10.1016/j.talanta.2004.08.060. Epub 2004 Nov 2.
Bismuth film electrode (BiFE) was shown to be an attractive alternative to common mercury film electrode (MFE) for anodic stripping voltammetric measurements. In this study, bismuth film, that was in situ deposited onto glassy carbon electrode, was used to detect zinc content of milkvetch, used in traditional Chinese medicine. Variables affecting the response have been evaluated and optimized. Experimental results showed a high response, with a good linearity (between 0.5x10(-6)molL(-1) and 3x10(-6)molL(-1)) a good precision (R.S.D.=3.58%) and a low detection limit (9.6x10(-9)molL(-1) with a 120s anodic). The anodic stripping performance makes the bismuth film electrode very desirable for measurements of trace nutritive element zinc in milkvetch and should impart possible restrictions on the use of mercury electrode.
铋膜电极（BiFE）已被证明是用于阳极溶出伏安测量的普通汞膜电极（MFE）的一种有吸引力的替代物。在本研究中，原位沉积在玻碳电极上的铋膜被用于检测中药黄芪中的锌含量。对影响响应的变量进行了评估和优化。实验结果显示出高响应、良好的线性（在0.5×10⁻⁶molL⁻¹和3×10⁻⁶molL⁻¹之间）、良好的精密度（相对标准偏差=3.58%）以及低检测限（在120秒阳极溶出时为9.6×10⁻⁹molL⁻¹）。阳极溶出性能使得铋膜电极非常适合用于测量黄芪中的微量营养元素锌，并且应该会对汞电极的使用施加可能的限制。
