Abstract
A practical test kit based on diazotization reaction of aromatic amines followed by coupling with 2-methyl-8-hydroxyquinoline has been developed to determine trace aniline in wastewater and surface water samples. The test kit consists of four tablets, which are added to the sample in sequence. The maximum absorption wavelength of the orange dye formed is 482 nm. Molar absorptivity and detection limit were found to be 2.5 × 104 Lmol−1cm−1 and 0.020mgL−1, respectively. Linearity was excellent in the concentration range 0.10–3.5 mg L−1 aniline in water. The test kit has been used to analyze aniline in polluted river water and wastewater samples from a pharmaceutical factory. The recoveries of addition of aniline in real water samples were between 95–106% (n=5) and relative standard deviation was less than 5% for standard sample at a concentration of 2.0 mgL−1 aniline. It's a very sensitive and easy-to-operate method for in situ analysis of aniline in water.
Published Version
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