Persistence of herbicides in seawater. Herbicide concentrations recorded over time in standard flask experiment 2013. (NERP TE 4.2, AIMS and UQ)
- Between 01/01/2013 - 00:00 and 31/12/2013 - 00:00
This dataset shows the concentrations of multiple herbicides remaining over time in a simulation flask persistence experiment conducted in 2013. \n \nThe aim of this study was to quantify the persistence multiple herbicides in a standard flask experiment. Time it takes for degradation of half of this herbicide is termed the "half-life". The half-life can be used to help develop environmental risk assessments. \n \n \nMethods: \n \nHerbicide degradation experiments were carried out in flasks according to the OECD methods for "simulation tests". The tests used natural coastal seawater and were carried out in the incubator shakers under 3 conditions: (1) 25°C in the dark, (2) 31°C in the dark and (3) 25°C in the light. The light levels were ~40 µE on a 12:12 light:dark cycle and the flasks shaken at 100 rpm for up to 365 days. \nHerbicides included: \nAtrazine, Diuron, Hexazinone, Tebuthiuron, Metolachlor, 2,4-D, \nWater samples were taken periodically and analysed by high performance liquid chromatography-mass spectrometry (HPLC-MS/MS). \nUncertainty in the analytical method for repeated injections into the LC-MS results in a concentration uncertainty of approximately ± 0.2 µg/L \nReductions in the concentration of herbicides were plotted to predict the persistence of each herbicide (its "half-life"). \nThe emergence of the three herbicide breakdown products were also quantified: Desisopropyl Atrazine and Desethyl Atrazine from Atrazine and 3,4-dichloroaniline from Diuron. \n \n \nFormat: \n \nExcel spreadsheet: Herbicide_persistence_standard_flask_16042015.xlsx \n \n \nData Dictionary: \n \n- Time (days): Time in days from the start of the experiment \n- Sample replicate: Up to three replicate flasks were used containing herbicides and these were incubated under identical light and temperature conditions \n- D25 Atrazine: Concentration of Atrazine remaining in flasks under dark conditions at 25°C \n- D25 Desisopropyl AtrazineAtrazine: Concentration of Desisopropyl AtrazineAtrazine remaining in flasks under dark conditions at 25°C \n- D25 Desethyl Atrazine: Concentration of Desethyl Atrazine remaining in flasks under dark conditions at 25°C \n- D31 Atrazine: Concentration of Atrazine remaining in flasks under dark conditions at 31°C \n- D31 Desisopropyl AtrazineAtrazine: Concentration of Desisopropyl AtrazineAtrazine remaining in flasks under dark conditions at 31°C \n- D31 Desethyl Atrazine: Concentration of Desethyl Atrazine remaining in flasks under dark conditions at 31°C \n- L25 Atrazine: Concentration of Atrazine remaining in flasks under light conditions at 25°C \n- Sample lost: missing data because the sample was lost \n- L25 Desisopropyl AtrazineAtrazine: Concentration of Desisopropyl AtrazineAtrazine remaining in flasks under dark conditions at 25°C \n- L25 Desethyl Atrazine: Concentration of Desethyl Atrazine remaining in flasks under dark conditions at 25°C \n- D25 Diuron: Concentration of Diuron remaining in flasks under dark conditions at 25°C \n- D25 Di Cl Analine: Concentration of 3,4-dichloroaniline remaining in flasks under dark conditions at 25°C \n- D31 Diuron: Concentration of Diuron remaining in flasks under dark conditions at 31°C \n- D31 Di Cl Analine: Concentration of 3,4-dichloroaniline remaining in flasks under dark conditions at 31°C \n- L25 Diuron: Concentration of Diuron remaining in flasks under light conditions at 25°C \n- L25 Di Cl Analine: Concentration of 3,4-dichloroaniline remaining in flasks under light conditions at 25°C \n- D25 Hexazinone: Concentration of Hexazinone remaining in flasks under dark conditions at 25°C \n- D31 Hexazinone: Concentration of Hexazinone remaining in flasks under dark conditions at 31°C \n- L25 Hexazinone: Concentration of Hexazinone remaining in flasks under light conditions at 25°C \n- D25 Tebuthiuron: Concentration of Tebuthiuron remaining in flasks under dark conditions at 25°C \n- D31 Tebuthiuron: Concentration of Tebuthiuron remaining in flasks under dark conditions at 31°C \n- L25 Tebuthiuron: Concentration of Tebuthiuron remaining in flasks under light conditions at 25°C \n- D25 Metolachlor: Concentration of Metolachlor remaining in flasks under dark conditions at 25°C \n- D31 Metolachlor: Concentration of Metolachlor remaining in flasks under dark conditions at 31°C \n- L25 Metolachlor: Concentration of Metolachlor remaining in flasks under light conditions at 25°C \n- D25 2,4-D: Concentration of 2,4-D remaining in flasks under dark conditions at 25°C \n- D31 2,4-D: Concentration of 2,4-D remaining in flasks under dark conditions at 31°C \n- L25 2,4-D: Concentration of 2,4-D remaining in flasks under light conditions at 25°C\n
- Negri, Andrew, Dr
Australian Institute of Marine Science (AIMS)
- Australian Institute of Marine Science (AIMS)
- Negri, Andrew, Dr
Australian Institute of Marine Science (AIMS)
- Australian Institute of Marine Science (AIMS)
- AIMS Data Centre
Australian Institute of Marine Science (AIMS)
Creative Commons Attribution 3.0 Australia License
Other constraints:
Use Limitation: All AIMS data, products and services are provided "as is" and AIMS does not warrant their fitness for a particular purpose or non-infringement. While AIMS has made every reasonable effort to ensure high quality of the data, products and services, to the extent permitted by law the data, products and services are provided without any warranties of any kind, either expressed or implied, including without limitation any implied warranties of title, merchantability, and fitness for a particular purpose or non-infringement. AIMS make no representation or warranty that the data, products and services are accurate, complete, reliable or current. To the extent permitted by law, AIMS exclude all liability to any person arising directly or indirectly from the use of the data, products and services.
Attribution: Format for citation of metadata sourced from Australian Institute of Marine Science (AIMS) in a list of reference is as follows: "Australian Institute of Marine Science (AIMS). (2015). Persistence of herbicides in seawater. Herbicide concentrations recorded over time in standard flask experiment 2013. (NERP TE 4.2, AIMS and UQ), https://apps.aims.gov.au/metadata/view/73bd7e38-95e1-4616-b9c0-8f9aa6752172, accessed[date-of-access]".