Optimizing Signal-to-Noise Ratio in Flame Atomic Absorption Spectrometry Using Sequential Simplex Optimization

Autor:	Richard J. Stolzberg
Rok vydání:	1999
Předmět:	Chemistry education Analytical chemistry General Chemistry Noise (electronics) Signal Education law.invention Signal-to-noise ratio Simplex algorithm Volume (thermodynamics) law Horizontal position representation Cylinder Atomic absorption spectroscopy
Zdroj:	Journal of Chemical Education. 76:834
ISSN:	1938-1328 0021-9584
DOI:	10.1021/ed076p834
Popis:	A simplex optimization experiment for use in the upper-level chemistry laboratory curriculum is described. Students adjust the level of four variables to maximize the signal-to-noise ratio (S/N) in the flame atomic absorption determination of calcium. The rules of variable size simplex optimization guide the students to conditions that increase S/N. When students examine the entire data set, they observe that three of the four variables, flame observation height, burner horizontal position, and fuel-to-air ratio, affect S/N. The fourth variable, volume of water in a graduated cylinder, has no effect on S/N. The 4- to 10-fold improvement in S/N occurs because the signal increases and the noise decreases.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d10c3af8d077ea94a080a8c98ec601c5 https://doi.org/10.1021/ed076p834 Zobrazit plný text záznamu