Quantitative determination of DCPA and it's Metabolites using strong anion exchange solid-phase extraction with gas chromatography/electron capture detection Public Deposited

http://ir.library.oregonstate.edu/concern/undergraduate_thesis_or_projects/6682x845c

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Rapid and accurate analytical methods are needed to assess the impacts of agricultural chemicals on soil and water resources. Solid-phase extraction (SPE) was evaluated as an alternative method to conventional liquid-liquid extraction for the quantitative analysis of the herbicide DCPA and its metabolites in ground waters. Strong anion exchange (SAX) proved to be the most effective phase for isolating the highly water soluble mono- and dicarboxylic acid metabolites in addition to the hydrophobic parent compound, DCPA. Using a gas chromatograph equipped with electron capture detection, a high degree of accuracy and precision was achieved with spike recoveries of the diacid metabolite from surface waters of 80.1 ± 2.3 %. The detection limit of the method was found to be approximately 0.05 pg/L for a 100 mL water sample. The developed method was validated by comparing the measured concentrations of DCPA and its acid metabolites in ground waters to those measured using conventional liquid-liquid extraction. In a survey of wells from Malheur county of eastern Oregon, total concentrations of the acid metabolites of DCPA in ground water ranged from less than the detection limit (0.05 μg/L) to 198 μg/L.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Grantor
Non-Academic Affiliation
Rights Statement
Language
File Format
File Extent
  • 139897 bytes
Digitization Specifications
  • Master files scanned at 600 ppi (256 Grayscale) using Capture Perfect 3.0 on a Canon DR-9080C in TIF format. PDF derivative scanned at 300 ppi (256 B+W), using Capture Perfect 3.0, on a Canon DR-9080C. CVista PdfCompressor 3.1 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2007-12-12T14:21:02Z (GMT). No. of bitstreams: 1 Monohan_K.pdf: 139897 bytes, checksum: 6a0e3f8bf6523e9734e5a1aa4cdfc9af (MD5)
  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2007-12-12T14:21:02Z (GMT) No. of bitstreams: 1 Monohan_K.pdf: 139897 bytes, checksum: 6a0e3f8bf6523e9734e5a1aa4cdfc9af (MD5)
  • description.provenance : Submitted by Sara MIntonye (smscanner@gmail.com) on 2007-12-11T23:55:06Z No. of bitstreams: 1 Monohan_K.pdf: 139897 bytes, checksum: 6a0e3f8bf6523e9734e5a1aa4cdfc9af (MD5)

Relationships

In Administrative Set:
Last modified: 10/27/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items