Exploring Digital Signals and Noise in Instrumental Analysis©
Augustus W. Fountain III
Department of Chemistry
United States Military Academy
West Point, NY 10996
United States
mail to: augustus_fountain@usma.edu

The fundamental concepts of noise and signal-to-noise ratio are in central to the discipline of analytical chemistry. Since chemical instrumentation dominates the modern laboratory, it is critical that students understand the role noise plays in limiting the precision of a measurement. It is equally important that they understand how to implement active and passive means to mitigate noise. The purpose of this Mathcad document is to allow the student to gain a familiarity with the concepts of signal-to-noise ratios and to explore the advantages of ensemble averaging and digital filtering analytical signals. The student is lead through a series of individual exercises that culminates in a capstone experience where they simultaneously apply all of the concepts. This document requires Mathcad 6 or higher.
Editor's Commentary
Audiences: Upper-Division Undergraduate
Pedagogies: Computer-Based Learning
Domains: Analytical Chemistry, Laboratory Instruction
Topics: Chemometrics, Fourier Transform Techniques, Mathematics / Symbolic Mathematics, Instrumental Methods
File NameDescriptionSoftware TypeSoftware Version
SignalsNoise2000.PDF Read-Only Document
SignalsNoise.mcd JCE Computational Document. Requires Mathcad 6 or higher. Mathcad 8
JCE JCE Subscribers only: name and password or institutional IP number access required.
Foutain, A. W. III J. Chem. Educ. 2001 78 271.
Comments to: A. W. Fountain III
©Copyright 2003 Journal of Chemical Education