Lipophilic and immobilized anionic additives in solvent polymeric membranes of cation-selective chemical sensors

Thomas Rosatzin, Eric Bakker, Koji Suzuki, Wilhelm Simon

研究成果: Article査読

499 被引用数 (Scopus)

抄録

Lipophilic borate salts are frequently used as anionic additives in potentiometric and optical cation-selective sensors based on solvent polymeric membranes. The lifetime of such membranes may be limited owing to chemical decomposition and leaching of the components. Borate salts, in particular, are decomposed in the presence of acids in the membrane. Adequately substituted borate salts and sulphonic acids, such as sodium tetrakis[3,5-bis(trifluoromethyl)phenyl]borate, sodium tetrakis[3,5-bis(2-methoxyhexafluoro-2-propyl)phenyl]borate and dinonylnaphthalenesulphonic acid (DNSS), are shown to be sufficiently stable as membrane additives. Furthermore, lipoholic mobile or immoblizied sulphonic acids [DNNS or poly(2-acrylamido-2-methyl-1-propanesulphonic acid-co-styrene), respectively were also tested as anionic additives. Their influence on the selectivity behaviour of the sensor is attributed to their strong association with positively charged species in the membrane phase. It may be kept small by choosing ionophores that from stable complexes with the analyte.

本文言語English
ページ(範囲)197-208
ページ数12
ジャーナルAnalytica Chimica Acta
280
2
DOI
出版ステータスPublished - 1993 8月 16

ASJC Scopus subject areas

  • 分析化学
  • 生化学
  • 環境化学
  • 分光学

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