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• W2897715110 abstract "Conventional nonconductive vinylic films with dispersed aniline change their color and become conductive in the presence of specific oxidant gases, namely, chlorine and hydrogen peroxide. The color change arises from the polymerization of the aniline to yield the conjugated polymer polyaniline, which at the same time renders the flexible vinylic films conductive. We present a simple and straightforward method using both colorimetric and electrical responses to detect and quantify the presence of oxidants (Cl2 and H2O2) in the air. Using RGB analysis (red, green and blue parameters defining the colors in digital pictures on a computer display) based on different pictures taken with a smartphone of discs extracted from the films and by measuring the UV-vis spectral variation in the presence of different concentrations of Cl2 and H2O2, we obtained limits of detection and quantification between 15 and 200 ppbv for H2O2 and between 37 and 583 ppbv for Cl2. Additionally, the electrical response was measured using a fabricated device to visually detect the electrical conductivity activation of the sensor in the presence of oxidant atmospheres, detecting a rapid decrease in resistivity (three orders of magnitude) when the polymerization of aniline began, changing the film from non-conductive to conductive." @default.
• W2897715110 created "2018-10-26" @default.
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• W2897715110 date "2019-02-01" @default.
• W2897715110 modified "2023-09-26" @default.
• W2897715110 title "Easy and inexpensive method for the visual and electronic detection of oxidants in air by using vinylic films with embedded aniline" @default.
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• W2897715110 doi "https://doi.org/10.1016/j.jhazmat.2018.10.039" @default.
• W2897715110 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30368061" @default.
• W2897715110 hasPublicationYear "2019" @default.
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