Abstract

The reproducibility of the KBr pelleting technique for inorganic sulfates was assessed using a Fourier transform infrared spectrometer. Day-to-day variation in peak frequencies of selected bands had standard deviations ranging from 0. to 1.5 cm⁻¹. This 1 cm⁻¹ standard deviation was shown to be due to changes in bandshape, probably due to variations in sample preparation from operator to operator. It was concluded that the reproducibility of sulfates in KBr is sufficient to allow the design of computerized spectral matching programs to identify specific sulfate species based on band frequencies and intensities.

Method to derive the infrared complex refractive indices n(λ) and k(λ) for organic solids from KBr pellet absorption measurements

Kelly A. Peterson, Ryan M. Francis, Catherine A. Banach, Ashley M. Bradley, Sarah D. Burton, Jeremy D. Erickson, Schuyler P. Lockwood, Karissa L. Jensen, Michael O. Yokosuk, Timothy J. Johnson, and Tanya L. Myers
Appl. Opt. 63(6) 1553-1565 (2024)

Sulfuric acid in KBr pellet spectroscopy

Frederic E. Volz
Appl. Opt. 18(14) 2353-2354 (1979)

Measuring the Transmittance of Atmospheric Dust in KBr Pellets Using a CO₂ Laser

Kenneth O. White and James D. Lindberg
Appl. Opt. 12(11) 2544-2545 (1973)

Reduction of speckle noise and mitigation of beam wander in tunable external cavity quantum cascade lasers using rotating diamond/KBr pellet coupled with multimode fiber

Yohan Yoon, Christopher J. Breshike, Christopher A. Kendziora, Robert Furstenberg, and R. Andrew McGill
Opt. Express 27(6) 8011-8020 (2019)

Infrared Spectra of Inorganic Dielectric Solids

Johannes N. Plendl and Peter J. Gielisse
Appl. Opt. 3(8) 943-949 (1964)