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

Takaya Murakami; Yoshiaki Iwamuro; Satoshi Chinaka; Nariaki Takayama; Teruyuki Komatsu

doi:10.2116/analsci.31.1325

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

Anal Sci. 2015;31(12):1325-8. doi: 10.2116/analsci.31.1325.

Authors

Takaya Murakami¹, Yoshiaki Iwamuro, Satoshi Chinaka, Nariaki Takayama, Teruyuki Komatsu

Affiliation

¹ Forensic Science Laboratory, Ishikawa Prefectural Police H.Q.

PMID: 26656825
DOI: 10.2116/analsci.31.1325

Abstract

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.