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dc.contributor.authorHill, Bernard Dale.en_US
dc.date.accessioned2012-05-15T15:54:09Z
dc.date.available2012-05-15T15:54:09Z
dc.date.issued1974en_US
dc.identifierocm72776784en_US
dc.identifier.urihttp://hdl.handle.net/1993/6145
dc.description.abstractAtrazine (2-chloro-4-ethylamino-6-isopropylamino-s-triazine), cyanazine (2-[4-chloro-6-ethylamino-s-triazin-2-yl)amino]-2-methylpropionitrile), and cyprazine (2-chloro-4-cyclopropylamino-6-isopropylamino-s-triazine) were ultrasonically extracted form soils with aqueous methanol. Cleanup consisted of chloroform partitioning and column chromatography on deactivated basic alumina. Extracts were determined by gas chromatography with alkali flame ionization detection. The recoveries of bound a-triazine residues from soils fortified at 1 ppm ranged from 81.6 to 94.5%. Two 15 minute ultrasonic extractions were comparable to 24 hours of Soxhlet extraction for atrazine. Sensitivity is placed at 2 ng of s-triazine in the injected sample and the least determinable concentration is estimated at 0.02 ppm s-triazine in soil. The method developed is thought to be applicable to weathered s-triazine residues in field soils. The identity of the gas chromatographic peaks observed for atrazine, cyanazine, and cyprazine standards was confirmed using infrared spectrophotometry and mass spectrometry. Spectra obtained from 10-25 ug of trapped eluates are presented and interpreted. Although mass spectrometry was preferred, both confirmatory techniques could be used to identify these s-triazines in "unknown" extracted samples.en_US
dc.format.extentvii, 60 leaves.en_US
dc.language.isoengen_US
dc.rightsen_US
dc.rightsinfo:eu-repo/semantics/openAccess
dc.titleDetermination of s-triazine herbicides in Manitoba soilsen_US
dc.typeinfo:eu-repo/semantics/masterThesis
dc.typemaster thesisen_US
dc.degree.disciplinePlant Scienceen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
local.subject.manitobayesen_US


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