“ATOMIC ABSORPTION 1”
VARIAN SPECTRA AA200 EXPERIMENTS ANALYSIS OF MULTIVITAMINE TABLETS.

Experiment # 1
Analysis of multivitamin tablets for copper and iron

Instructor: Gregg Taylor

Student: Martin Tadros

ID#: 100288670

Date Perform: October 9, 2013 Lab Partner: N/A
Note: This lab I did last semester
Note 2: The lab done this semester the dilution I did was the problem.

Will send this one as a reference that I understand the concept and calculation of the lab and will send another lab explaining the errors.

AA1 - Varian Spectra AA 200 Experiments

INTRODUCTION
Concept:
Atomic absorption spectroscopy (AAS) is a spectra analytical procedure for the quantitative determination of chemical elements employing the absorption of optical radiation (light) by free atoms. It is capable of measuring the concentrations of a wide variety of element in sample. In AAS method measures the light absorbed by the very large proportion of atoms in the ground state. It is a widely used technique due to its simplicity, effectiveness, and relatively low cost. Atomic-absorption (AA) spectroscopy uses the absorption of light to measure the concentration of gas-phase atoms. Since samples are usually liquids or solids, the analyses atoms or ions must be vaporized in a flame or graphite furnace. The atoms absorb ultraviolet or visible light and make transitions to higher electronic energy levels. The analyse concentration is determined from the amount of absorption. Applying the Beer-Lambert law directly in AA spectroscopy is difficult due to variations in the atomization efficiency from the sample matrix, and non uniformity of concentration and path length of analyses atoms (in graphite furnace AA). Concentration measurements are usually determined from a working curve after calibrating the instrument with standards of known