CHM311H5 Study Guide - Final Guide: Electron Capture Detector, Jablonski Diagram, Mass Spectrometry

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23 Apr 2015
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Answer question 1 this is a must. Look at how many points it"s worth: what technique and why, block diagram, draw and label schematic, describe a method for sample prep and calibration of response. Sample question 1: determine quantity of pcbs in farmed salmon: gc mass spectrometry (can never go wrong with this but this will give everything), Electron capture detector (method of choice: look if hydrophilic or hydrophobic, then pick your solvent the compound is generally hydrophobic. We pick hexane, recover hexane (or octanol), we inject into gc. We partition salmon smoothie into 5 separatory beakers. Add: 0 (std), 5, 10, 15, 20 ug to each beaker. Signal (peak area) vs. quantity of standard added. Sample question 2: content of gold in a rock sample collected in cottage country : dissolve in nitric acid to pulverize. Electronic transitions: absorption, jablonski diagram, transition dipoles. Sample prep (hydride generation, hg cold vapour prep) Detectors for high energy and radiation and particles.

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