Optical contact in ATR/FT-IR spectroscopy

Sanong Ekgasit, Adchara Padermshoke

研究成果: Contribution to journalArticle査読

29 被引用数 (Scopus)

抄録

Optical contact between an internal reflection element (IRE) and a sample is crucial for obtaining a good spectrum in an attenuated total reflection (ATR) experiment. When an air gap is present between the IRE and the sample, the spectrum severely deteriorates. Two techniques for determining the goodness of contact are proposed - first, by making a comparison between polarized ATR spectra and, second, by making a comparison between ATR and transmission spectra. When the optical contact is achieved, the normalized p-polarized ATR spectrum is exactly the same as the normalized s-polarized ATR spectrum. Moreover, the ratio between the normalized absorbance measured in the ATR mode and the normalized absorbance measured in the transmission mode equals the ratio between the frequency being considered and the normalization frequency. Theoretical and experimental investigations have been performed in order to verify the proposed techniques.

本文言語英語
ページ(範囲)1352-1359
ページ数8
ジャーナルApplied Spectroscopy
55
10
DOI
出版ステータス出版済み - 10 2001
外部発表はい

All Science Journal Classification (ASJC) codes

  • 器械工学
  • 分光学

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