期刊
DYES AND PIGMENTS
卷 74, 期 1, 页码 176-180出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2006.01.032
关键词
porphyrin; organophosphate; diazinon; detection; dyeing; absorbance spectroscopy
The absorbance spectrum of porphyrin meso-tetraphenylporphine (TPP) shifts to a shorter wavelength when interacting with the organophosphate diazinon. This spectral shift in the presence of diazinon is more obvious in the difference spectra (TPP + diazinon) - TPP, and can be observed in porphyrin-DMF solution and porphyrin-dyed cotton fabric. In solution, the difference spectrum has a peak at 412 nm and a trough at 421 nm. For TPP dyed cotton fabric, the difference spectrum has a peak at 415 mu and a trough at 430 nm. The absorbance difference (AA) between peak and trough in the difference spectra has a linear relationship with diazinon concentration. This spectral property of porphyrin can be used to detect diazinon in the environment. Diazinon can be detected at 0.5 ppm level by TPP in solution, and at I I ppm level by TPP dyed cotton fabric. The solid state detection capability of TPP dyed cotton fabric implies that textiles can serve as the platform for chemical sensors. (c) 2006 Elsevier Ltd. All rights reserved.
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