Measuring naphthenic acids concentrations in aqueous environmental samples by liquid chromatography.

@article{Yen2004MeasuringNA,
  title={Measuring naphthenic acids concentrations in aqueous environmental samples by liquid chromatography.},
  author={Tin-Wing Yen and William P Marsh and Michael Mackinnon and Phillip M. Fedorak},
  journal={Journal of chromatography. A},
  year={2004},
  volume={1033 1},
  pages={83-90}
}
Naphthenic acids are found in wastewaters from petroleum refineries and oil sands extraction plants. Currently, the concentrations of these toxic carboxylic acids are determined by extracting them into methylene chloride and measuring the absorption of the carboxyl group by Fourier-transform infrared (FTIR) spectroscopy. An improved HPLC method, that is simpler and faster than the FTIR method, was used to detect the 2-nitrophenylhydrazides of the naphthenic acids at concentrations as low as 5… CONTINUE READING
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