Pulse Amperometric Detection of Lithium in Artificial Serum Using a Flow Injection System with a Liquid/Liquid-Type Ion-Selective Electrode

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• 作者：Shigeo Sawada ; Hirotsugu Torii ; Toshiyuki Osakai ; and Takashi Kimoto
• 刊名：Analytical Chemistry
• 出版年：1998
• 出版时间：October 15, 1998
• 年：1998
• 卷：70
• 期：20
• 页码：4286 - 4290
• 全文大小：142K
• 年卷期：v.70,no.20(October 15, 1998)
• ISSN：1520-6882

文摘

A voltammetric ion-selective electrode based on thefacilitated transfer of Li⁺ by dibenzyl-14-crown-4 at theo-nitrophenyl phenyl ether/water interface was applied tothe amperometric detector in a FIA system for Li⁺ with acation-exchange column. The current response was stablydetected by pulse amperometry in which voltage pulsesof short duration (50 ms) were applied at the interval of2 s. With this FIA system, 0.2-2.0 mM Li⁺ in aqueoussolution could be determined even in the presence of120-160 mM Na⁺, the detection limit being 0.15 mM.A test using artificial serum demonstrated the practicalapplicability of this system.