| چکیده انگلیسی مقاله |
ABSTRACT Polycyclic aromatic hydrocarbons (PAHs) are mainly byproducts of incomplete combustion of coal/petroleum and pyrolysis of organic components. These components are listed as priority pollutants by the European :union: and the U.S. Environmental Protection Agency due to carcinogenicity, teratogenicity, and mutagenicity. Hence, the identification and monitoring of PAHs as a worldwide concern has attracted great attention among researchers [1]. Recently, microfluidic paper-based analytical devices (μPAD) have shown the high potential of paper as a substrate material in microfluidic technology it is easy to access, cheap, and chemically compatible for many applications [2]. Here, a simple microfluidic fluorescence paper-based sensor array designed for the rapid detection and simultaneous classification of ten PAHs (naphthalene (Nap), anthracene (Ant), phenanthrene (Phe), fluorene (Fl), pyrene (Py), acenaphthene (Ace), chrysene (Chry), benzo[a]anthracene (BaA), benzo[a]pyrene (BaP), fluoranthene (Fla)) using poly(arylene ethylene)s as sensing elements. Fluorescence intensity changes of the sensor array were recorded using a smartphone (irradiated by a UV lamp of 366 nm) and then linear discriminant analysis (LDA) is used as a pattern recognition method, analyzing the discrimination performance of the sensing array. This method offered accurate discrimination of 10 different PAHs at various concentrations in a range of 5-100 mgL-1. 10 different PAHs were correctly identified using linear discrimination analysis. 100% classification accuracy was achieved for model training, validating LDA model by cross-validation resulted in 90% classification accuracy for 5 mg L-1. |
