Development of a electrolytic cell of stepladder form for on-line metal-concentration used by flow-injection analysis

开发用于流动注射分析的在线金属富集的梯形电解池

• 批准号: 12640593
• 负责人: WATANABE kunihiro
• 金额: $ 1.66万
• 依托单位: Tokyo University of Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12640593/
• 关键词: Stepladder electrolytic cell; Solution resistance; Flow injection analysis; Electrolytic concentration; Potential gradient; On-line concentration; Zinc; Lead; 微量金属分析; フロースルー電解セル; 分離濃縮

A novel flow-through electrochemical cell was developed using the electrode potential controlled with iR-drop. The iR-drop was adjusted by solution resistance between working and counter electrodes. This concentration method using the electrochemical cell was applied to the pre-concentration and separation of Pb and Zn. The flow-injection analysis apparatus used in this study had triple channels, and one of them was used for a carrier and buffer solution. Other channels were for detection reagent and sample solution. The metal ions in the eluate obtained from the electrochemical cell were determined with 4-(2-pyridylazo) resorcinol. At a consumption of sample solution 3ml, the detection limit (3δ) is 78 ppb for Pb and 7ppb for Zn. The relative standard deviations (n=4) in the results of analysis on the solution containing Pb 200ppb and Zn 20ppB were 6.5% and 5.7%, respectively. Moreover, pre-concentration and separation were also investigated for the solution containing Pb, Zn and Cu

开发了一种新型的流通式电化学电池，使用iR-drop控制电极电位。通过工作电极和对电极之间的溶液电阻来调节iR下降。将该电化学池富集方法应用于铅、锌的富集分离。本研究中使用的流动注射分析装置具有三个通道，其中一个通道用于载体和缓冲溶液。其他通道用于检测试剂和样品溶液。用4-（2-吡啶偶氮）间苯二酚测定了电化学电池中的痕量金属离子。当样品用量为3 ml时，铅的检出限（3δ）为78 ppb，锌为7 ppb。对含Pb 200 ppb和Zn 20 ppb的溶液进行测定，相对标准偏差（n=4）分别为6.5%和5.7%。此外，还对含Pb、Zn、Cu的溶液进行了富集分离研究

项目成果

Kunihiro Watanabe, Yasuyuki Narita and Masayuki Itagaki: "Purification of sodium borate by continuous solvent extraction with a Teflon phase separator"Bunseki Kagaku. Vo. 51. 97-103 (2002)

Kunihiro Watanabe、Yasuyuki Narita 和 Masayuki Itagaki：“通过聚四氟乙烯相分离器连续溶剂萃取纯化硼酸钠”Bunseki Kagaku。

渡辺邦洋, 渡辺 卓, 板垣昌幸: "アゾ化合物の接触酸化反応を利用する飲料水中のマンガンのフローインジェクション分析"分析化学. 51巻7号. 553-559 (2002)

Kunihiro Watanabe、Takashi Watanabe、Masayuki Itagaki：“利用偶氮化合物的催化氧化反应对饮用水中的锰进行流动注射分析”，《分析化学》第 51 卷，第 7 期。553-559 (2002)

岩田純一, 板垣昌幸, 渡辺邦洋: "2,2'-ビピリジンを用いるインジウムの蛍光定量"分析化学. 51巻9号. 721-727 (2002)

Junichi Iwata、Masayuki Itagaki、Kunihiro Watanabe：“使用 2,2-联吡啶的荧光测定”《分析化学》第 51 卷，第 9 期。721-727 (2002)

岩田純一, 板垣昌幸, 渡辺邦洋: "2,2'-ビピリジンを用いるインジウムの蛍光定量"分析化学. 51(9). 721-727 (2002)

Junichi Iwata、Masayuki Itagaki、Kunihiro Watanabe：“使用 2,2-联吡啶的荧光测定”分析化学 51(9)。

渡辺邦洋, 飯束友恵, 板垣昌幸: "過剰試薬の除去/蛍光分析による2,2'-ジヒドロキシアゾベンゼンを用いるアルミニウムの定量"分析化学. 51巻7号. 545-551 (2002)

Kunihiro Watanabe、Tomoe Iizuka、Masayuki Itagaki：“通过荧光分析去除过量试剂/使用 2,2-二羟基偶氮苯测定铝”，《分析化学》第 51 卷，第 7 期。545-551 (2002)