Abstract
A simple sensitive extractive spectrophotometric method for determination of trichloroethylene is proposed. Trichloroethylene is treated with pyridine to form glutaconic aldehyde by heterolytic cleavage of the pyridine ring. Glutaconic aldehyde is further coupled with 4-aminoacetanilide to form an orange–red dye which is extractable in 3-methyl-1-butanol. The extracted dye shows absorption maximum at 520 nm. The system obeys Beer’s law in the range of 0.05–0.8 μg mL−1. Important analytical parameters such as time, temperature, reagent concentration, acidity etc. have been optimized for complete colour reaction. Sandell’s sensitivity and molar absorptivity for the system were found to be 0.001 μg cm−2 and 1.2 × 105 L mol−1 cm−1, respectively. The proposed method is satisfactorily applied to micro-level determination of trichloroethylene in various environmental and biological samples.
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Tiwari, N., Asthana, A. & Upadhyay, K. Spectrophotometric analysis of trichloroethylene in various environmental and biological samples. Res Chem Intermed 39, 3867–3875 (2013). https://doi.org/10.1007/s11164-012-0888-z
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DOI: https://doi.org/10.1007/s11164-012-0888-z