The deethylatrazine/atrazine ratio as an indicator of the onset of the spring flush of herbicides into surface water of the Midwestern United States
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Abstract
The ratio of deethylatrazine to atrazine (DAR) may be used to record the first major runoff of herbicides from non-point-source corn fields to surface water in the Midwestern United States. The DAR dramatically decreases from ∼0.5 to < 0.1 upon application of herbicide and the first major runoff event of a basin. The DAR then gradually increases to values of approximately 0.4–0.6 during the harvest season. Furthermore, the DAR may be used in studies of surface water movement to give a temporal indicator of water moving into reservoirs for possible storage of herbicides. It is hypothesized that deethylatrazine, which accounts for only 6% of the degradation of atrazine, becomes a significant metabolite in surface water (∼ 50% of parent compound) because of its selective removal from soil. This removal process may be an important concept for consideration in studies of herbicide contamination of rivers and reservoirs.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | The deethylatrazine/atrazine ratio as an indicator of the onset of the spring flush of herbicides into surface water of the Midwestern United States |
| Series title | International Journal of Environmental Analytical Chemistry |
| DOI | 10.1080/03067319608045555 |
| Volume | 65 |
| Issue | 1-4 |
| Year Published | 1996 |
| Language | English |
| Publisher | Taylor & Francis |
| Contributing office(s) | Toxic Substances Hydrology Program |
| Description | 12 p. |
| First page | 203 |
| Last page | 214 |
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