Cocaine Correction Sheet – 20 points. I. Objective (2 points) A. The objective of the laboratory was to extract, identify, and quantify the presence of cocaine on money. [1.5] B. A secondary objective of the laboratory was to learn the technique of gaschromatography/mass spectrometry. [.5] II. Procedure (4 points) A. A dollar bill was sonicated for five minutes in a vial with HCl (8 mL) [.5] B. The HCl solution was then basified with NaOH unitl pH >10 [.5] C. The basic solution was extracted with CH2Cl2, dried with Na2SO4 [1] D. The solution was then evaporated to dryness and 0.8 mL of CH2Cl2 containing 20 ug/mL? of benzophenone internal standard was added. [1] E. The mass spectrum of this solution was then obtained. [.5] III. Results (5 points) A. Mass spectrum attached to your or your lab partner’s lab report [1] B. Identification of cocaine peak [1] C. Calculation of quantity of cocaine in your sample (or someone else’s if yours didn’t have any) Cocaine, ug/mL = 83.83 * (area coke/area standard) -.2128 [1] D. Class data table [2] i. Label table, table 1, etc… ii. Group number, ug/mL cocaine, denomination, year, ug (ug/mL * .8) IV. Writeup (6 points) A. Cocaine could/could not be identified. The library got a good match, peak was clear, or otherwise. [1] B. Only 1 group out of 11 (or class data only) – calculate % had cocaine on bill. [1] Not enough info to see differences between denomination [1] Didn’t do foreign currency [.5] – would be an improvement. C. Quantitated on bill using calibration curve [.5] – what was range of values [.5] D. Changes/improvements – could improve by using more, using foreign currency [1.5] V. Lab notebook (2 points) Name/Partner [.25] Title [.25] Date [.25] List of reagents/equip [.25] Procedure [1] Results