LAKE WALES

 Lake Wales home

• • Lake Wales Ridge study area description
  • Groundwater study
    • Network design and sampling history
    • Target analytes and laboratory methods
    • Data and results summaries
      • Rainfall data
      • Groundwater-quality data
  • Lake study
  • Publications and presentations
  • Current related studies in the Ridge vicinity
  • Project personnel
  • Links to related sites
  • Provisional data statement

  COOPERATORS

  
  
  

Lake Wales Ridge Groundwater: Target analytes and laboratory methods

Laboratory analyses for the project have been performed by the FDACS Pesticide Laboratory, the FDACS Food Laboratory, and the SWFWMD Laboratory and contract laboratories.

The pesticides and pesticide degradates were analyzed using gas chromatography with a nitrogen phosphorous detector (NPD), high-performance liquid chromatography (HPLC) [both UV/VIS and post column derivatization], liquid chromatography/mass spectroscopy (LC/MS) and ion chromatography, and included both standard USEPA methods and FDACS custom methods for selected compounds. Concentrations of organic compounds in spiked samples generally were within about 75 to 105 percent of expected concentration, with the exception of deisopropyl atrazine, which yielded about 50 percent recovery.

Target analytes evaluated quarterly include field measurements, basic water chemistry, nutrients, pesticides and pesticide degradates, and selected trace constituents.  Target analytes and the analyzing laboratories are listed in data table 2 (Excel file).  Limited reconnaissance sampling has been performed to assess the occurrence of additional simazine degradates (data table 5)

Method detection limits for pesticides, pesticide degradates, and selected target analytes are listed in table 3.