CHEM3001_PP2.2010 - THE UNIVERSITY OF THE WEST INDIES MONA...

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THE UNIVERSITY OF THE WEST INDIES MONA DEPARTMENT OF CHEMISTRY CHEMICAL ANALYSIS II - CHEM3001 TUTORIAL PAPER 2 1. Forensic analysts called to the site of a fire were asked to investigate the possibility of  arson.  Debris from the fire was collected for analysis.  Discuss different methods  whereby the samples could have been analysed by gas chromatography for evidence of  accelerants. 2. Differentiate between the operations of the Electron Capture Detector versus the Flame  Ionisation Detector.   3. Harris (2007), Question 24-8:   Use Table 24-3 to predict the elution order of the following compounds from columns  containing (a) polydimethylsiloxane (b) (diphenyl) 0.35 (dimethyl) 0.65 polysiloxane, and (c)  poly(ethyleneglycol):  hexane, heptane, octane, benzene, butanol, 2-pentanone.  Table 24-3: Retention Indexes for several compounds on common stationary phases Phase Benzen bp 80 
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CHEM3001_PP2.2010 - THE UNIVERSITY OF THE WEST INDIES MONA...

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