3. Unknown Solution Concentration: From the calibration curve, determine the molarity of your unknown solution, not by interpolation on the graph but algebraically from the computer - generated m value in the equation for a straight line, y = mx + b. If b equals zero, then y = mx, where m is the slope of the line, x is the solution concentration and y is the measured absorbance. Since the molar absorptivity & and the path length are constants, this equation is consistent with Beer's law A = ɛbc which becomes A = mc.
3. Unknown Solution Concentration: From the calibration curve, determine the molarity of your unknown solution, not by interpolation on the graph but algebraically from the computer - generated m value in the equation for a straight line, y = mx + b. If b equals zero, then y = mx, where m is the slope of the line, x is the solution concentration and y is the measured absorbance. Since the molar absorptivity & and the path length are constants, this equation is consistent with Beer's law A = ɛbc which becomes A = mc.
Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Chapter8: An Introduction To Optical Atomic Spectrometry
Section: Chapter Questions
Problem 8.7QAP
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