Use of a neural network for the analysis of fluorescence spectra from mixtures of polycyclic aromatic hydrocarbons

1992 ◽  
Author(s):  
John M. Andrews ◽  
Stephen H. Lieberman
Keyword(s):  
Neural Network ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Fluorescence Spectra ◽  
Polycyclic Aromatic

scholarly journals Absorption and Laser Induced Fluorescence Spectroscopy of Neutral Polycyclic Aromatic Hydrocarbons in Argon matrices

2015 ◽  
Vol 11 (A29A) ◽  
Author(s):  
Salma Bejaoui ◽  
Farid Salama ◽  
Ella Sciamma-O'Brien
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Fluorescence Spectra ◽  
Laser Induced Fluorescence ◽  
Broad Emission Band ◽  
Band Emission ◽  
Polycyclic Aromatic ◽  
Argon Matrices ◽  
Extended Red Emission ◽  
Solid Argon

Polycyclic aromatic hydrocarbons (PAHs) are considered as plausible carriers for the extended red emission (ERE), a photoluminescent process associated with a wide variety of interstellar environments, as well as for broad emission band features seen in cometary spectra. We report the absorption spectra of phenanthrene, anthracene, fluoranthene, pentacene, pyrene, chrysene and triphenylene isolated at 10 K in solid argon matrices together with laser induced fluorescence (LIF) spectra at 355 nm of matrix-isolated anthracene and fluoranthene. LIF spectra are compared with the UV/blue fluorescence spectra of the Red Rectangle Nebula (RR). The LIF spectra measured in solid Ar matrices have been shifted to the predicted position of the PAH band emission in the gas phase for comparison with the astronomical observations (Fig. 1).

Detection of Polycyclic Aromatic Hydrocarbons Combining Fluorescence Analysis with ABC-BP Neural Network

2015 ◽  
Vol 42 (11) ◽  
pp. 1115001
Author(s):  
王书涛 Wang Shutao ◽  
陈东营 Chen Dongying ◽  
王兴龙 Wang Xinglong ◽  
韩欢欢 Han Huanhuan ◽  
王佳亮 Wang Jialiang
Keyword(s):  
Neural Network ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Bp Neural Network ◽  
Fluorescence Analysis ◽  
Polycyclic Aromatic

POLYCYCLIC AROMATIC HYDROCARBONS IN OYSTERS (CRASSOSTREA VIRGINICA) FROM GEORGIA COASTAL WATERS, ANALYZED BY HIGH-PRESSURE LIQUID CHROMATOGRAPHY

1981 ◽  
Vol 1981 (1) ◽  
pp. 341-345 ◽  
Author(s):  
Richard F. Lee ◽  
Dorothy Lehsau ◽  
Michael Madden ◽  
William Marsh
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Liquid Chromatography ◽  
Aromatic Hydrocarbons ◽  
Coastal Waters ◽  
Fluorescence Spectra ◽  
Reverse Phase ◽  
Reverse Phase Liquid Chromatography ◽  
Polycyclic Aromatic ◽  
Phase Liquid ◽  
Kings Bay

ABSTRACT A number of polycyclic aromatic hydrocarbons (PAH) were detected in oysters from sites in coastal Georgia with analysis by reverse-phase liquid chromatography with fluorescence detection. Compounds were identified by collection of peaks and comparison of excitation and emission fluorescence spectra with authentic standards. Major PAH in the oysters from the ports of Savannah and Brunswick included methylfluorene, anthracene, 2,3-benzofluorene, methylpyrene, 2,3-benzanthracene, benzo(b) fluoranthene, benzo(k)fluoranthene, and benzo(a)pyrene. Concentrations of most PAH were low in oysters from Skidaway River, which is part of the intracoastal waterway, and Kings Bay submarine base. The concentration of benzo(a)pyrene, a well known carcinogen, was 0.5 micrograms per kilogram in Brunswick and Savannah but was not detected (less than 0.01 micrograms per kilogram) in Skidaway River and Kings Bay.

Extraction and Estimation of Polycyclic Aromatic Hydrocarbons in Smoked Foods. II. Benzo (a) pyrene

1966 ◽  
Vol 49 (3) ◽  
pp. 611-617 ◽  
Author(s):  
John W Howard ◽  
Richard H White ◽  
Bert E Fry ◽  
Elizabeth W Turicchi
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Fluorescence Spectra ◽  
General Procedure ◽  
Positive Identification ◽  
Polycyclic Aromatic

Abstract The carcinogen benzo(a)pyrene has been isolated from various smoked foods by modification of the general procedure for polycyclic aromatic hydrocarbons described in Part I. Recoveries of benzo(a)pyrene, added to 75, 100, and 150 g samples of frankfurters, fish, and cheese at levels of 1–2 ppb, ranged from 73 to 100%. Positive identification of the hydrocarbon recovered from feeds at levels as low as 0.02 ppb can be made from its fluorescence spectra.

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