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Announcements • Set 1 Lab Reports – hand back • Set 2 Lab Reports – Due 4/10 • Final Exam – April 15th • Future Mondays (after 4/15) – Set 3 Presentation – 4/29 – 4/22 and other Mondays • can’t start lab at 5:00 in Sequoia 538 (Chem 125 conflict) • can run lab from 5:30 to 9:00 or • 5:30 to 8:30 plus Wed from 5:00 to 8:00 or • first 30 min of lab in Sequoia 540 Labs – More Details • Set 2 Lab Reports – Real sample analysis will count for at most 25% of points (less for HPLC lab) • Set 3 Labs – We have tristearin and tripalmitin that can be used as recovery standards – We also have old linoleic (C18:2) and linolenic (C18:3) acid standards that can be used as qualitative standards (these standards decompose easily) – These are in 540 freezer – You should be deciding on your “real” sample soon and let me know what other equipment or standards you will need Labs – More Details • Set 3 Labs – cont. – Tentative presentation and paper due dates – Presentation 4/29 (1 week after finishing lab) – Paper due 5/6 – Presentation should be focused on your sample of interest and should include some literature research (why is this sample of interest and what analysis has been done previously) Labs – More Details • Term Project – You should figure out what you plan to do before next Monday – Two options: • isolation of significant ingredient from household product (best for 5 to 50% that ingredient) • use of “new” equipment for analysis of compound from sample (e.g. use of HPLC-fluorescence detection for capsaicin in chile samples or analysis of caffeine in a beverage by SPME-GC-NPD) – I will have a sign up • limit to number of students using particular equipment for bulk of work (not a problem for isolation projects) • only 1 student per household sample/ingredient • you may want to have a back-up compound/plan Final Exam - Review • Example posted on-line • 15% of total grade • Can use lab notebook and notes from lab lecture (including slide) • What to know – from 1/28 lecture – Understand goals of method optimization and measures of how well that is accomplished – Basic safety rules – How to transfer data (raw, chromatograms, and software table data) to Excel – Steps to turning on and off HPLCs and GCs
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