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Terbuthylazine and deethylterbuthylazine in rain and surface water - Determination by enzyme immunoassay and gas chromatography/mass spectrometry

Acta Hydrochimica et Hydrobiologica

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Abstract

Rain and surface water samples from Southern Germany were investigated from 1991 to 1995 for terbuthylazine and one of its major metabolites, deethylterbuthylazine. The concentrations observed were compared to the concentrations found for atrazine and deethylatrazine in the same water samples. Concentrations ranged from <0.02 ??g/L to 0.7 ??g/L for terbuthylazine and from <0.02 ??g/L to 0.6 ??g/L for deethylterbuthylazine, compared to concentrations of <0.02 ??g/L to 3 ??g/L and <0.02 ??g/L to 0.5 ??g/L for atrazine and deethylatrazine, respectively. The ratios of metabolite concentrations to parent compound concentrations were calculated for deethylterbuthylazine to terbuthylazine (DTR) and deethylatrazine to atrazine (DAR). In rain water, DTR of 0.8...3.0 and DAR of 0.3...1.9 were determined with mean values of 0.9...1.7 for DTR 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 DTR in rain water were about 50...100% higher than the DAR. This indicates a higher degradation rate of terbuthylazine during atmospheric transport. In surface water, DTR 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...1.3 were observed. The ratios increased from June to September.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Terbuthylazine and deethylterbuthylazine in rain and surface water - Determination by enzyme immunoassay and gas chromatography/mass spectrometry
Series title:
Acta Hydrochimica et Hydrobiologica
Volume
25
Issue:
1
Year Published:
1997
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Acta Hydrochimica et Hydrobiologica
First page:
5
Last page:
10
Number of Pages:
6