| Abstract: | Summary: The application of the UV derivative spectroscopy method to determine aniline and phenol in spiked waste water samples was investigated. Two statistical procedures (modified t-tests) were used to evaluate constant and percentage systematic errors of the method presented. On our conditions, i.e. type of samples, the aniline determination by the 2nd and 4th derivatives was predominantly disturbed but in contrary the phenol concentrations of all samples determined by the 4th and 5th derivatives show no significant bias. The influence of substituted phenols was examined by factor experiments (Plackett-Burman-plan). Generally the higher derivative order brings the better resolving power and in part then the interference is eliminated (p-cresol, hydroquinone). |
