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ENV100Y5 (713)
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Lecture

env100 note 57.docx

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Department
Environment
Course
ENV100Y5
Professor
murk
Semester
Winter

Description
ENV100 Lecture NotesMar 21 2012 Northern ExposureThe Tools of CSI Applied to the Environment Guest lecture Professor KrullSelection CriteriaWhich chemicals are problemso Considerations Amounts produced used released Chemical properties Toxicological properties Exposure potentialPresencebehaviour in ecosystem Threat to ecosystem integrity Analytical ChemistryAnalytical ChemistryChemical science applied to situations where identification speciation and quantity are to be established Measurementso intrinsic Properties mass density etco chemical interactions reactionso effects of externally applied energyelectrochemical thermal electromagneticDetectionMeasurementppm 1 part in a million partso 1 g per 106 go 1 mgkgo 1 mgL ppb 1 part in a billion partso 1 g per 109 g 1 ppt 1 part in a trillion partso 1 g per 1012 g DetectionMeasurementA sensitive nose o can detect the odour of fuel oil at ppb level Highly sensitive modern analytical techniqueso can detect and measure concentrations of some chemicals in water and other media at even better than ppt level
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