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Technological Advances Make Low-Cost Infrared Microspectroscopy Routine

  • Bethany Renstrom (a1), Kelly Minuskin (a1), Bryce Egan (a1), André J. Sommer (a1), David Schiering (a2) and Gregg Ressler (a2)...

Abstract

A low-cost infrared microscope is evaluated in both transmission and attenuated total internal reflection (ATR) sampling modes. Transmission spectra of 60 to 250 micrometer samples exhibited an excellent signal-to-noise ratio. Signal-to-noise in transmission mode also correlated well with theoretical predictions. The quantitative capability of the microscope was demonstrated by measuring the colorant concentration of red, yellow, and blue polypropylene fibers. These latter measurements were conducted using the ATR sampling mode of the microscope. Colorant concentrations could be measured to 1% by weight, and calibration curves with excellent R2 values were obtained over the dye concentration range of 1 to 10% by weight colorant.

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References

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Technological Advances Make Low-Cost Infrared Microspectroscopy Routine

  • Bethany Renstrom (a1), Kelly Minuskin (a1), Bryce Egan (a1), André J. Sommer (a1), David Schiering (a2) and Gregg Ressler (a2)...

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