title: Highly Sensitive Detection of Organophosphorus Pesticides Using 5,10,15,20-Tetrakis(4-hydroxyphenyl)porphyrin.
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.
authors.affiliation: Forensic Science Laboratory, Ishikawa Prefectural Police H.Q.
authors.forename: Takaya
authors.initials: T
authors.lastname: Murakami
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Iwamuro
authors.forename: Satoshi
authors.initials: S
authors.lastname: Chinaka
authors.forename: Nariaki
authors.initials: N
authors.lastname: Takayama
authors.forename: Teruyuki
authors.initials: T
authors.lastname: Komatsu