铋(Ⅲ)-槲皮素极谱络合吸附波及微量铋的测定  

Polarographic Adsorptive Complex Wave of Bismuth-Quercetin and Its Application to the Determination of Bismuth

作　　者：张成志[1] 

机构地区：[1]乐山师范高等专科学校化学系,乐山614004

出　　处：《分析化学》1997年第4期427-430,共4页Chinese Journal of Analytical Chemistry

摘　　要：在ｐＨ＝３．８，０．４ ｍｏｌ／Ｌ的ＨＣＯＯＨＨＣＯＯＮａ缓冲溶液中，铋与槲皮素的络合物在单扫极谱仪上能形成灵敏的络合物吸附波。该波在Ｂｉ３＋离子浓度为４ × １０－８～６×１０－６ｍｏｌ／Ｌ范围内与波高 ｈｐ成正比关系，检出限达到１×１０－８ｍｏｌ／Ｌ。对电极反应的机理进行了研究。利用该极谱波测定了铅基轴承合金中的铋含量。In the buffer solution of 0. 4 mol/L pH=3. 80 HCOOH-HCOONa, a sensitive ad- sorptive complex wave of Bi-quercetin was obtained using single-sweep polarography. The concentration is proportional to the wave height (hp) in the range of 4 ?0 -8-6 ?0 -6mol/L Bi3+. The detection limit is 1. 0?0-8 mol/L. The rate constant of the surface electrode re- action Ks= 6.38 S-1 and electron-transfer coefficient α=0. 59 are determined. The proposed method was applied to the determination of bismuth in lead-base bearing metal.

关 键 词：铋 槲皮素 单扫极谱 极谱 配合物吸附波 

分 类 号：O614.532[理学—无机化学] TG115.314[理学—化学]