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Substituted cobalt phthalocyanine complexes as carriers for nitrite-sensitive electrodes

✍ Scribed by Jun-Zhong Li; Xin-Yu Pang; Ru-Qin Yu

Book ID: 102983392
Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 672 KB
Volume: 297
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(94)00239-8

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✦ Synopsis

Ned polv6&1yf chkxide2 membrane electrode based on lipophilic 2,9,fg,23-tetra-ferr-bu~lphthala@jranine-cobalt is described which demonstrates excellent selectivity toward the nitrite ion. The resuIting electrodes displayed a near-Nerrrstian response for nitrite in tire concentration range 10-"-OAl M with the selectivity sequence nitrite > thioqanate > iodide > perchkxate > bromide > nitrate > cbkxide. The l.JV/Vis spectra and ax. impedance studies showed that the excellent selectivity for nitrite was r&ted to the unique interaction between the centraf cobalt ion and nitrite.

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