Alternating Layers of Iron(III) Tetra(N‐methyl‐4‐pyridyl)‐porphyrin and Copper Tetrasulfonated Phthalocyanine for Amperometric Detection of 4‐Nitrophenol in Nanomolar Levels |
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| Authors: | Phabyanno Rodrigues Lima Wilney de Jesus Rodrigues Santos Marília Oliveira Fonseca Goulart Auro Atsushi Tanaka Sônia Maria Carvalho Neiva Tanaka Lauro Tatsuo Kubota |
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| Institution: | 1. Department of Analytical Chemistry, Institute of Chemistry, University of Campinas – UNICAMP, 13084‐971, Campinas, SP, Brazil;2. Institute of Chemistry and Biotechnology, CCEN, Federal University of Alagoas, 57072‐970, Maceió‐AL, Brazil;3. Departament of Chemistry Technology, UFMA, Avenida dos Portugueses s/n, 65085‐040, S?o Luís, MA, Brazil |
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| Abstract: | 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. |
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| Keywords: | 4‐Nitrophenol FeT4MPyP CuTSPc Amperometric sensor |
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