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- W1987218087 abstract "The chromatographic fingerprints of industrial o-toluic acid, m-toluic acid and p-toluic acid have been established by HPLC-UV detection according to their impurity groups. HPLC separation of all relative substances involved in the groups was developed on a Kromasil C(18) column by using methanol-water-NH(4)Ac-HAc buffer (100mM, pH 4.70) 15/65/20 (v/v/v) as the mobile phase at a flow rate of 1.5mL/min, and detection was operated by UV adsorption at a wavelength of 254nm. The ultraviolet spectra corresponding to each chromatographic peak were also recorded for further identification of all components. Whether the limits of relative impurities residues in a toluic acid product are qualified or not can be intuitively estimated by analyzing its chromatogram with comparison to the fingerprint. This protocol has successfully provided some Chinese manufacturers with a simple and feasible method for quality control of toluic acids for industrial use." @default.
- W1987218087 created "2016-06-24" @default.
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- W1987218087 date "2007-01-15" @default.
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- W1987218087 title "Chromatographic fingerprints of industrial toluic acids established for their quality control" @default.
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- W1987218087 doi "https://doi.org/10.1016/j.talanta.2006.03.054" @default.
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