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The SLIM Spectrometer
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Section:Abstract
A new spectrometer, here denoted the SLIM (simple, low-power, inexpensive, microcontroller-based) spectrometer, was developed that exploits the small size and low cost of solid-state electronic devices. In this device, light-emitting diodes (LED), single-chip integrated circuit photodetectors, embedded microcontrollers, and batteries replace traditional optoelectronic components, computers, and power supplies. This approach results in complete customizable spectrometers that are considerably less expensive and smaller than traditional instrumentation. The performance of the SLIM spectrometer, configured with a flow cell, was evaluated and compared to that of a commercial spectrophotometer. Thionine was the analyte, and the detection limit was 
0.2 μM with a 1.5-mm-path length flow cell. Nonlinearity due to the broad emission profile of the LED light sources is discussed.
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This article has been cited by 1 ACS Journal articles (1 most recent appear below).
Modeling the Effect of Polychromatic Light in Quantitative Absorbance Spectroscopy
Rachel Smith and Kevin CantrellJournal of Chemical Education2007 84 (6), 1021Modeling the Effect of Polychromatic Light in Quantitative Absorbance Spectroscopy
Rachel Smith and Kevin CantrellJournal of Chemical Education2007 84 (6), 1021This laboratory experiment is the first in a semester-long instrumental analysis course. Students measure the emission profiles of various light sources including light-emitting diodes (LEDs), the transmission of interference and absorption filters, and ...
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- Published In Issue January 01, 2003
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