Highly Sensitive Detection of Organophosphorus Pesticides Using 5,10,15,20-Tetrakis(4-hydroxyphenyl)porphyrin

We describe a unique UV-visible absorption spectral property of 5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin (THPP) in the presence of organophosphorus (OP) pesticides. Upon titrating each 16 among total 40 different OP pesticides, the Soret band was significantly red-shifted, and a very intense Q...

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Bibliographic Details
Published in:Analytical Sciences 2015/12/10, Vol.31(12), pp.1325-1328
Main Authors: MURAKAMI, Takaya, IWAMURO, Yoshiaki, CHINAKA, Satoshi, TAKAYAMA, Nariaki, KOMATSU, Teruyuki
Format: Article
Language:English
Subjects:
5,10,15,20-Tetrakis(4-hydroxyphenyl)porphyrin
Analytical Chemistry
Chemistry
diprotonation
Mathematical analysis
Methyl alcohol
organophosphorus pesticides
Pesticides
Sensors
solvent dependence
Solvents
Spectra
UV-visible absorption spectroscopy
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Summary:We describe a unique UV-visible absorption spectral property of 5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin (THPP) in the presence of organophosphorus (OP) pesticides. Upon titrating each 16 among total 40 different OP pesticides, the Soret band was significantly red-shifted, and a very intense Q band appeared. They were attributed to the diprotonation of THPP. A suitable solvent for this reaction was determined to be methanol. THPP would become a potential sensor molecule used to detect OP pesticides with high sensitivity in the concentration range of 10−6 – 10−4 M.
ISSN:0910-6340
1348-2246
DOI:10.2116/analsci.31.1325