Ion-selective electrodes based on l-tryptophan and l-tyrosine

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• 作者：Takayo Moriuchi-Kawakami ; ^{kawakami@chem.oit.ac.jp} ; Yu Tokunaga ; Hiroyuki Yamamoto ; Yasuhiko Shibutani
• 关键词：Ion-selective electrode ; Amino acids ; Tryptophan ; Tyrosine ; Cu2+ ion selectivity
• 刊名：Talanta
• 出版年：2012
• 出版时间：30 May, 2012
• 年：2012
• 卷：94
• 期：Complete
• 页码：99-103
• 全文大小：320 K

文摘

Novel ion-selective electrodes (ISEs) based on amino acids have been developed. l-Tryptophan and l-tyrosine, which are amino acids, are employed as ionophores for solvent polymeric membrane electrodes. The proposed ISEs show rapid Nernstian responses for the Cu²⁺ ion over the concentration ranges of 3.0 ¡Á 10^?-1.0 ¡Á 10^? M. These ISEs exhibit comparatively good selectivity with respect to alkaline, alkaline earth, and some transition and heavy metal ions and the ammonium ion. The ISE based on tryptophan also indicates the Nernstian response for the benzylammonium ion.