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Alternating Layers of Iron(III) Tetra( N ‐methyl‐4‐pyridyl)‐porphyrin and Copper Tetrasulfonated Phthalocyanine for Amperometric Detection of 4‐Nitrophenol in Nanomolar Levels
Author(s) -
Lima Phabyanno Rodrigues,
de Jesus Rodrigues Santos Wilney,
Goulart Marília Oliveira Fonseca,
Tanaka Auro Atsushi,
Tanaka Sônia Maria Carvalho Neiva,
Kubota Lauro Tatsuo
Publication year - 2008
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200804330
Subject(s) - amperometry , phthalocyanine , porphyrin , copper , tetra , electrode , chemistry , linear range , analytical chemistry (journal) , inorganic chemistry , detection limit , electrochemistry , chromatography , photochemistry , organic chemistry , medicinal chemistry
The present work describes the development of a highly sensitive amperometric sensor for 4‐NP in nanomolar levels using a glassy carbon electrode modified with alternating layers of CuTSPc and FeT4MPyP. After optimizing the operational conditions, the sensor provided a linear response range for 4‐NP from 5 up to 100 nmol L −1 with sensitivity, detection, and quantification limits of 14 nA L nmol −1 , 1.9 nmol L −1 , and 5.4 nmol L −1 , respectively. The proposed sensor showed a stable response for at least 200 successive determinations. This modified electrode can be used to the determination of 4‐NP in water samples.