Absorption of radiation by substances at “high” concentrations: A new equation and process monitoring applications
作者:
R. Thatipamala,
G. A. Hill,
S. Rohani,
期刊:
The Canadian Journal of Chemical Engineering
(WILEY Available online 1993)
卷期:
Volume 71,
issue 6
页码: 977-981
ISSN:0008-4034
年代: 1993
DOI:10.1002/cjce.5450710622
出版商: Wiley Subscription Services, Inc., A Wiley Company
关键词: Keywords: spectrometry;Beer‐Lambert's law;deviations from Beer's law;high concentrations;on‐line measurement
数据来源: WILEY
摘要:
AbstractBeer‐Lambert's law has a wide range of applications, spanning the fields of pure sciences and engineering, and is commonly used for the determination of the concentration of an optically sensitive compound, at “low” concentrations. In this report it is shown that a log‐log expression, log(T/T0) = K log(C/C0), accurately models experimental data (±3%) for four different absorbing species, at “high” concentrations. The dimensionless constant K is shown to be only a characteristic of the absorbing species, and independent of the spectrophotometer/cuvette system used. The new equation is used for on‐line monitoring of dynamic biomass concentration in a continuous bioreactor (CSTBR) for a step change in
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