【摘要】 <正> 有关二甲酚橙的极谱性能及用其测定铕已进行过研究。但未见Bi(Ⅲ)-二甲酚橙配合物吸附溶出伏安分析法的报道。本文提出在pH 5的柠檬酸钠-盐酸介质中,形成铋(Ⅲ)-二甲酚橙(XO)配合物吸附富集的溶出伏安法,研究了配合物线性扫描伏安特性,确定了配合物组成比及在汞电极表面的吸附量;确定了吸附等温线模式、吸附自由能。说明该体系可进行开路富集,用拟定的方法测定了生物样品中痕量铋,结果满意.方法特点是测定铋的浓度范围宽,选择性好,灵敏度高。更多还原

【Abstract】 In this paper,the determination of the complex of bismuth-xylenol orange by adsorp-tive stripping voltammetry in sodium citrate-HCl medium (pH 5) is proposed.This complex was accumulated on the surface of the mercury electrode in an open circuit.The composition ratio of bismuth and xylenol orange is 1 ?2.The adsorption character at mercury electrode accords with that of the isothermal line of Frumkin.The adsorption coefficient (β=2.8×106) and the attractive factor (v=0.52) were determined.The mechanism of the complex wave was investigated.This method was applied to the determination of trace amounts of bismuth in human hair and human serum with satisfactory results.更多还原