development of an optical sensor based on sol-gel doped with 2,6-dichlorophenol indophenol for analysis of ascorbic acid
نویسندگان
چکیده
in this work, an optical sensor for detection of ascorbic acid is described. the sensor is fabricated by casting and spin-coating silica sol-gel doped with 2,6-dichlorophenol indophenol on the glass plates. the sols are in turn obtained by acidic hydrolysis of various precursors such as tetraethoxysilane, triethoxymethylsilane and triethoxyoctylsilane in the presence of 2,6-dichlorophenol indophenol as dopant. prepared sols then were coated on glass plates to form sol-gel films. uv-vis spectrophotometric properties of 2,6-dichlorophenol indophenol doped in sol-gel films were studied and compared with in solution. at the optimum conditions the re¬sponse of film to ascorbic acid is fast and linear in 0.07 – 3.34 mmol l-1 range. detection limit and relative standard deviation of presented sensor for determination ascorbic acid were 0.05 mmol l-1 and 1.32 %, respectively.
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عنوان ژورنال:
iranian journal of analytical chemistryناشر: payame noor university, iran
ISSN 2383-2207
دوره 1
شماره 1 2013
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