Rapid and Precise Coulometric Determination of Calcium Based on Electrolysis for Ion Transfer at the Aqueous | Organic Solution Interface

被引：15

作者：

Kasuno, Megumi ^{[1
,2
]}

Kakitani, Yuri ^{[1
]}

Shibafuji, Yayoi ^{[3
]}

Okugaki, Tomohiko ^{[3
]}

Maeda, Kohji ^{[3
]}

Matsushita, Takayuki ^{[1
]}

Kihara, Sorin ^{[4
]}

机构：

[1] Ryukoku Univ, Dept Chem Mat, Fac Sci & Technol, Otsu, Shiga 5202194, Japan

[2] Ryukoku Univ, Dept Chem Mat, Innovat Mat & Proc Res Ctr, Otsu, Shiga 5202194, Japan

[3] Kyoto Inst Technol, Dept Chem, Kyoto 6068585, Japan

[4] Kumamoto Univ, Dept Nat Sci, Fac Educ, Kumamoto 8608555, Japan

来源：

ELECTROANALYSIS | 2009年 / 21卷 / 17-18期

关键词：

Calcium; Electrolysis; Flow coulometry; Ion transfer; Immiscible electrolyte solutions; Interfaces; CAPILLARY-ELECTROPHORESIS; CHROMATOGRAPHY; EXTRACTION;

D O I：

10.1002/elan.200904616

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A flow system was developed for the precise determination of Ca2+ based on the electrolytic ion transfer at the aqueous vertical bar 1,2-dichloroethane, W vertical bar DCE, inter-face. N,N,N',N'-tetraoctyl-1,3-oxapentanediamide was added to DCE to facilitate the transfer of Ca2+. The determination of Ca2+ could be achieved with an efficiency of 99.9 +/- 0.1% based on the coulomb number for the transfer of Ca2+. The coexistence of Mg2+, Na+, or K+ of concentration identical with that of Ca2+ did not give any interference. The interference from a large excess of Na+ was removed at another cell with DCE containing bis[(12-crown-4)methyl]-2-dodecyl-2-methylmalonate placed before the cell for the determination.

引用

页码：2022 / 2029

页数：8

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