Terbuthylazine and Deethylterbuthylazine in Rain and Surface Water – Determination by Enzyme Immunoassay and Gas Chromatography/Mass Spectrometry

✍ Scribed by Dankwardt, A. ;Thurman, E. M. ;Hock, B.

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 706 KB
• Volume: 25
• Category: Article
• ISSN: 0323-4320
• DOI: 10.1002/aheh.19970250102

✦ Synopsis

The ratios of metabolite concentrations to parent compound concentrations were calculated for deethylterbuthylazine to terbuthylazine ( D T R ) and deethylatrazine to atrazine (DAR). In rain water, D T R of 0.8 ... 3.0 and DAR of 0.3 ... 1.9 were determined with mean values of 0.9 ... 1.7 for D T R and 0.6 ... 0.9 for DAR in the different years. The ratios increased during summer periods. The highest ratios were observed in samples from forest stands, showing that degradation of the herbicide has occurred during transport between the source and the sampling site. The D T R in rain water were about 50 ... 100'%1 higher than the DAR. This indicates a higher degradation rate of terbuthylazine during atmospheric transport. In surface water, D T R of 0.3.. . 1.2 with mean values of 0.5 ... 0.8 and DAR of 0.2 ... 2.2 with mean values of 0.2.. . I .3 were observed. The ratios increased from June to September.

____-* This contribution was presented as a poster during the annual meeting of the Water Chemistry. Division in the German Chemical Society (Fachgruppe Wdsserchemie in der GDCh),