Analysis of aminobenzoic acid in wastewater from a former ammunition plant with HPLC and combined diode array and fluorescence detection.
Aminobenzoic acids are of major interest in clin. anal., but their detn. in environmental samples has been rarely done. Therefore a method for the detn. of 10 aminobenzoic acids in water has been developed, using high-performance liq. chromatog. with combined diode array and fluorescence detection. Sepn. of the analytes has been achieved with a buffer pH 3/methanol gradient. The general elution order has been m-substituted <p-subst. <o-subst. aminobenzoic acids. UV and fluorescence data are presented. In a highly polluted water sample of the former ammunition plant Stadtallendorf/Hessen, 4-aminobenzoic acid, 2-aminobenzoic acid and 2-amino-4-nitrobenzoic acid have been detected. After passing a charcoal filter, only the concn. of 4-aminobenzoic acid in a sample from the same site has been above the detection limit. Besides the ten analytes investigated, several unknown compds. have been present in the samples.
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