高铁离子涂丝电极的研究与应用  

A Coated Wire Fe (Ⅲ) Electrode and Its Application

作　　者：庄秀润 岑传铨 

机构地区：[1]华侨大学应用化学系

出　　处：《华侨大学学报（自然科学版）》1990年第2期142-146,共5页Journal of Huaqiao University(Natural Science)

摘　　要：本文报道了以苄基十四烷二甲基四氯高铁酸铵为电活性物质的PVC涂丝电极测定Fe(Ⅲ)的方法。该电极对FeCl_4^-离子的Nernst响应范围为10^(-4)—10^(-1)M,极差为56mV(25℃)。检测下限为1.6×10^(-5)M,内阻3MQ左右。电极的再现性、选择性、响应时间均较好。该电极用于铁矿石中铁含量的测定结果满意。Tor use in the determination of Fe(Ⅲ), this paper presents a coated wire electrode in which the electroactive membrane is composed of tetrachloroferrate salt of benzyl teteadecyl dimethyl ammonium chloride, combining with polyvinyl chloride. A linear near-Nernst response to the electrode is obtained over a concentration range of 10^(-4) to 10^(-1) M FeCl_4^-, with a slope of 56 mV per concentration decade(25℃). It shows a detection limit of 1.6×10^(-5) M and a membrane resistance of about MΩ. It also sbows a fairly good repeatability, selective-ness and response time. The electrode has been applied successfully to the determination of Fe (Ⅲ) in iron ores.

关 键 词：电极 涂丝 选择性 铁矿石 铁 

分 类 号：O657.1[理学—分析化学]