A simple spectrophotometric method for the determination of arsenic in industrial and environmental samples using 2,4-Dihydroxy benzophenone-2-amino thiophenol.
2,4-Dihydroxy benzophenone-2-amino thiophenol (BPBT) has been proposed as new analytical reagent for the direct non-extractive spectrophotometric determination of arsenic. The reagent reacts with arsenic in acidic medium (pH=6.0, sodium acetate-acetic acid buffer) to form light greenish yellow colored 1:1 (M:L) complex. Maximum absorbance was obtained at 343 nm and remains constant for over 24 h. The molar absorptivity and Sandell's sensitivity of BPBT are found to be 6.01×10(4) L mol(-1)cm(-1) and 0.0016 μg cm(-2) respectively. The system obeys Beer's law in the range of 0.125-2.637 μg/ml of As (III). Since BPBT method is more sensitive, it was applied for the determination of arsenic in some environmental water samples.
Department of Chemistry, Sri Venkateswara University, Tirupati 517501, Andhra Pradesh, India.
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K
Deepa
Department of Chemistry, Sri Venkateswara University, Tirupati 517501, Andhra Pradesh, India. Electronic address: dryl53@gmail.com.
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Y
Lingappa
D065966:Absorption, Physicochemical; D001151:Arsenic / Q000032:analysis*; D001577:Benzophenones / Q000032:analysis* / Q000737:chemistry; D002138:Calibration; D004785:Environmental Pollutants / Q000032:analysis*; D007221:Industry; D007477:Ions; D013058:Mass Spectrometry; D066244:Proton Magnetic Resonance Spectroscopy; D012545:Schiff Bases / Q000032:analysis* / Q000737:chemistry; D012996:Solutions; D013053:Spectrophotometry / Q000379:methods*; D013055:Spectrophotometry, Infrared; D013438:Sulfhydryl Compounds / Q000032:analysis* / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis
C000594894:2,4-dihydroxybenzophenone-2-aminothiophenol; D001577:Benzophenones; D004785:Environmental Pollutants; D007477:Ions; D012545:Schiff Bases; D012996:Solutions; D013438:Sulfhydryl Compounds; D014874:Water Pollutants, Chemical; D001151:Arsenic
2,4-Dihydroxy benzophenone-2-amino thiophenol; Arsenic determination; Environmental samples; Spectrophotometry