Abstract

This work reports that inherent absorption by polytetrafluoroethlyene precludes its use as a near infrared or extended near infrared reflection reference material. The effect of this inherent absorption on certain analyte bands is shown. The effectiveness of a previously published method for removing moisture and hydrocarbons from the surface of polytetrafluoroethylene is shown. It is suggested that diffuse gold should be used as the reflection reference material for all measurements made below 5000 cm⁻¹.

© 1996 NIR Publications

Effect of polytetrafluoroethylene (PTFE) phase transition at 19°C on the use of Spectralon as a reference standard for reflectance

Christopher P. Ball, Andrew P. Levick, Emma R. Woolliams, Paul D. Green, Martin R. Dury, Rainer Winkler, Andrew J. Deadman, Nigel P. Fox, and Martin D. King
Appl. Opt. 52(20) 4806-4812 (2013)

Effects of Spectralon absorption on reflectance spectra of typical planetary surface analog materials

Hao Zhang, Yazhou Yang, Weidong Jin, Chujian Liu, and Weibiao Hsu
Opt. Express 22(18) 21280-21291 (2014)

Reflection properties of pressed polytetrafluoroethylene powder

Victor R. Weidner and Jack J. Hsia
J. Opt. Soc. Am. 71(7) 856-861 (1981)

Diffuse reflectance infrared spectrometry: characteristics of the diffuse and specular components

Paul W. Yang and Henry H. Mantsch
Appl. Opt. 26(2) 326-330 (1987)

Optical diffuse reflectance accessory for measurements of skin tissue by near-infrared spectroscopy

R. Marbach and H. M. Heise
Appl. Opt. 34(4) 610-621 (1995)