Class Notes (865,678)
CA (523,035)
UTSC (32,108)
Chemistry (491)
CHMB16H3 (24)

CHMB16Fall2012 Lecture 1 Notes.docx

3 Pages

Course Code
Kagan Kerman

This preview shows page 1. Sign up to view the full 3 pages of the document.
CHMB16Fall2012 Lecture 1: Introduction to Analytical Chemistry (Chapter 0) Definitions o Qualitative analysis – figuring out what is in your sample o Quantitative analysis – figuring out amount of x in your sample o Analyte = targeted molecule General steps in chemical analysis Selecting a method o When selecting a method of research of the analyte, factors such as time, efficiency and cost must be taken into consideration Obtaining the sample o There are 2 types of samples: heterogeneous and homogeneous (pure) o Separation techniques must be performed on heterogenous samples in order to obtain the analyte Processing the sample o Must prepare lab sample o Define replicate o Prepare solutions : physical and chemical changes o All measurements must be done at least 3 times in order for statistics to be accurate  the more measurements done, the more accurate the result Eliminating the interferences o The matrix o Calibrating and measuring concentration o Calculating results o Evaluating results by estimating their reliability (statistics) Classifying chemicals o Reagent grade(minimum standards set by ACS) o CHAPTER 00: Unnumbered Figure 0-3set by NIST) o Special purpose reagent chemicals (Sigma-Aldrich, EMD chemicals, etc) Example: how much caffeine is in chocolate? o o In chocolate there is caffeine and theobromine which is very structurally similar to caffeine o First, pestle and mortar is used to grind up the chocolate 13! 1 CHAPTER 00: Figure 0-8 Dissolve the chocolate CHAPTER 00: Figure 0-9 o centrifugation used to extract fat from chocolate to leave solid residue for analysis (fat free)  caffeine and theobromine are insoluble in petroleum ether, so upon centrifugation they will settle at the bottom of the tube o quantitative transfer of the residue to an Erlenmeyer flask was then done and the residues were dissolved in water 15! CHAPTER 00: Figure 0-10 o o centrifugation and filtration are used to separate the undesired solid residue from the aqueous solution of analytes ODS: octadesylsilane CH3(CH2)16CH2SiCl3
More Less
Unlock Document
Subscribers Only

Only page 1 are available for preview. Some parts have been intentionally blurred.

Unlock Document
Subscribers Only
You're Reading a Preview

Unlock to view full version

Unlock Document
Subscribers Only

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.