Introduction to Chemical Instrumentation
Laboratory ACHM 340L
Spring 2008, 1 credit hour Dr. C. L. Leverette
Department of Chemistry and Physics SBDG 305, 803-641-3291
Lab: T 9:25AM—12:
Office Hours: MWF
and by appointment.*
*Please feel free to call or e-mail me when needed. In addition, my appointment schedule is very flexible. Therefore, if the office hours stated above do not fit into your schedule, we can set up a time that is convenient for you.
Corequisite: ACHM 340
Required
materials:
· The labs will be provided to you prior to each Tuesday lab period.
· Scientific calculator
· Safety Goggles (supplied by the Department)
Required dress and conduct:
· No shorts
· Closed top shoes (absolutely no sandals or flip-flops)
· Must always wear safety goggles when in the lab.
· Long hair should be pulled back completely away from the face.
· Turn off cell phones while in lab. (unless the instructor has granted special permission.)
· No food or drink allowed in the lab.
· Absolutely no horseplay.
Failure to adhere to these or any other safety measures could lead to dismissal from the lab. You will not be able to make up the lab and you will receive a 0 for that lab. These rules are for your safety and the safety of your classmates.
If you come to lab without the proper dress, you will be asked to leave until you change your clothes and/or shoes. Unfortunately, you will not be able to have extra time to complete the lab.
In the event of an emergency, the appropriate emergency service and a faculty member must be notified immediately. I plan to be in lab with you at all times.
Emergency x6111
Dr. Leverette x3291
Dr. Fetterolf x3378
Dr. Willbrand x3409
Dr. Ruszczyk x3420
Dr. Pariyadath x3429
Course Objectives: ACHM 340L is designed to reinforce the key concepts learned in ACHM 340. The goals of this laboratory course are to introduce future scientists to modern chemical instrumentation, to familiarize these students with proper procedures for instrument usage, and to teach the fundamentals of data interpretation. Additionally, the concepts of qualitative and quantitative analysis will be differentiated and explored for the various techniques. Techniques to be introduced include: ultraviolet-visible spectroscopy, infrared and Raman spectroscopy, gas and liquid chromatography, atomic absorption spectroscopy, and nuclear magnetic resonance.
Each written lab, provided by me to you before each lab section, will outline the objectives and the procedures for each lab. You are expected to study this write up prior to coming to lab. You only have 3 hours of lab instruction and many of the labs will take the entire time. If you are not familiar with the lab, time will be wasted and you will not be able to finish with the data collection within the given lab period. If you fail to finish with the data collection, you must find a time that is convenient for you and with the instructor to complete the lab. I plan to introduce the instrument to you while we run samples. I will be available during the lab to answer questions and to help you with the experimental techniques. You should arrive promptly and immediately begin the lab. I will have all the materials you will need ready at your disposal. You must work diligently and efficiency to accomplish each lab. Failure to work hard will result in incomplete labs. I cannot help you or your grade if you do not work hard.
Grading: Labs (11*) at 40 pts each 440*
Total
Points for the Course 440*
*Students who have successfully completed ACHM 321L will only be required to complete 9 labs (40 points each) in 340L. Therefore, the total points for the course for these students will be 360. The first 2 labs in 340L are also taught in 321L to allow students who will not take 321L to learn these important principles.
Each written lab report, worth 40 pts, will be awarded the following points for each section.
Correct lab format 30 pts
and calculations
Accuracy of answer 10 pts (when applicable)
Total pts for each lab 40 pts
Final letter grades will be based on the percentage of the total points earned and the scale below.
≥ 90 A
88 or 89 B+
80-87 B
78 or 79 C+
70-77 C
68 or 69 D+
60-67 D
≤ 59 F
The tolerance for accuracy for a given lab is based on the performance of the class as a whole and on the results obtained from previous classes. This is completely at my discretion. For labs that do not require an accurate answer to a known amount, all 10 points will be given if the lab is done properly.
Lab write-ups for a given lab are due the following week prior to beginning the next lab. If lab write-ups are not turned by the start of the next lab period, 3 pts will be deducted from that lab’s grade for each day it is late. For instance, if a lab is 3 days late and the lab report initially earned 35 points, the final earned points for that lab would be 26.
Lab Report Guidelines: The following example (handout) of a correct lab write up must be copied in detail to receive full credit (30 pts) for the lab format and calculations sections of the lab. Pay special attention to this, especially on the first lab. I do not care how you collect the raw data from the lab. I recommend using a dedicated notebook that you can bring each week. I will not be grading this notebook. I have designed a lab write up format that mimics what is often used in industry. The goal is to give you experience using this format that is required of analytical chemists in a “real world” setting. This is very similar to the format I used when working in global R&D for Cargill, Incorporated. In industry, you would have a dedicated notebook for data collection, but your “deliverable” to your client would be a written report. You may be the brightest chemist ever, but if you cannot communicate through presentation and writing then you are ineffective and will have a hard time finding a job. I want you to treat me as your client. You are providing me with a research report that I can use for my operations and to show my management. This mock situation will give you a good feel for what is expected of you when you enter the workforce. Yes…you will be expected to write once you leave college!
The lab reports must be typed on a computer. Use available graphing software (Microsoft Excel) when appropriate. You may handwrite the calculations under the Results and Discussion section, but do so neatly! Lab reports are due prior to the start of the next lab.
Hazardous Chemicals: In this course, you will be using hazardous reagents for the experiments. If you follow the proper dress and conduct guidelines stated in this syllabus, you have no need to worry. I will be present during the lab period if a problem should occur. In addition, eye wash stations, lab showers, and fire extinguishers are readily available in the lab if needed. Please contact me with any questions.
Tentative Lab Schedule:
Date Lab
1/15 Check-In;
Review syllabus
1/22 Perfecting
the Art of Pipetting and Calibrating Volumetric Glassware*
1/29 Linear
Regression Exercise, Statistical Analysis of Weighing*
2/5 The Analysis
of Soil Samples for Iron using Atomic Absorption Spectroscopy
2/12 Atomic
Absorption Analysis of Real Water Samples- A Lesson on Detection Limit and Sensitivity
2/19 The Determination of Aspirin by UV-Visible Spectrophotometry
2/26 Attenuated
Total Reflectance Spectroscopy of a Complex Mixture
3/4 No Lab – Pittcon 2008
3/11 Spring Break
3/18 An Introduction into Surface-Enhanced Infrared
Absorption (SEIRA) Spectroscopy
3/25 Exploring the
Effects of Experimental Variables on Raman Spectroscopy Analysis of Various
Chemical Solids
4/1 The Determination of Dichloromethane in Commercial Paint Strippers
by GC and the Internal Standard Method
4/8 HPLC - TBD
4/15 Quantitative
Analysis of Aspirin, Phenacetin, and Caffeine
Mixtures by
Nuclear Magnetic Resonance Spectrometry
4/22 Lab Check-out
Attendance: Attendance
of all labs is expected, though excused absences are understandable. Unexcused
absences on lab days will result in a numerical grade of 0 for that lab.
Excused absences will be allowed at my discretion. The missed lab for an
excused absence must be made up at a time that is convenient for both the
student and the instructor. Please contact me with any questions.
Disability Statement: If you have a physical, psychological, and/or learning disability which might affect your performance in this class, please contact the Office of Disability Services, 126A BSED, (803) 641-3609, as soon as possible. The Disability Services Office will determine appropriate accommodations based on medical documentation.
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