CHEM 322 Midterm: CHEM 326 Midterm 2 2006

135 views3 pages
31 Jan 2019
Department
Course
Professor

Document Summary

Name: _____________________: polyaromatic hydrocarbons (pah"s) can be analyzed by either gc/ms or. These planar aromatic hydrocarbons have negative electron affinities and moderate molecular weights (consider them to be 3 fused benzene rings). Compare and contrast the analysis of this class of compounds by gc/ms and. Discuss column choice, expected resolution, ionization mechanisms and expected relative sensitivities. Midterm 2: a) compare and contrast apci and appi as ion sources for lc/ms. B) the instrumentation and experimental conditions are similar for positive ci and negative ci in gc/ms. Explain how this can be and describe the chemistry involved. Midterm 2: define the following techniques and explain how the following techniques are related, hplc/pda and hplc/ms, ecd and ecni. 3c) maldi and fab: ion trap cid and quadrupole cid. Multiple choice (circle best answer: when analyzing a compound by electrospray which of the following is true. (a) compound must be an acid or base.