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On-line NMR Reaction Monitoring — A Powerful Analytical System for the Lab Bench
Magritek
We describe how a new high-resolution benchtop NMR spectrometer can be used directly in the fume hood of a chemistry lab to monitor the progress of chemical reactions on-line. Reactants can be pumped through the spectrometer in continuous mode from the reactor to the magnet and back using standard PTFE tubing. The method is illustrated by the examples of the acetalization of acetaldehyde and the reduction of acetophenone to 1-phenylethanol.
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Reverse Engineering of Multilayer Films Using Nanoscale IR Spectroscopy
Tom Eby, Usha Gundusharma, Michael Lo, Khoren Sahagian, Curt Marcott, and Kevin Kjoller, Anasys Instruments
The identification of unknown multilayer samples is an important industrial application of IR microscopy. However, as the layer thicknesses become smaller than 10 µm, then the spatial resolution of IR microscopy is insufficient to unambiguously identify the layers. We introduce a new technique of nanoscale IR spectroscopy where an AFM probe tip is used as an IR absorption detector for competitive deformulation of thin multi-layer films.
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Reaction Monitoring with the QE Pro Spectrometer: Chemical Stoplight Reaction
Yvette Mattley, PhD, Ocean Optics
The chemical stoplight reaction is a reversible oxidation reduction reaction featuring the redox indicator dye indigo carmine. In this application note, we describe the use of the QE Pro spectrometer for measuring the change in absorbance during the chemical stoplight reaction. Enhanced spectrometer features including onboard buffering for data integrity are described.
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Maple Syrup Color Analysis Using UV-vis Spectrophotometry
Shimadzu
One of the most common applications for QA/QC environments is color analysis and being able to assign a color value to finished products. This application note illustrates the use of color analysis software and a UV-vis spectrophotometer with a large photometric range for quick and easy spectral acquisition, and interpretation into a meaningful color value.
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