Attenuated Total Reflection (ATR) Fourier Transform Infrared (FT-IR) Spectroscopy of Oxidized Polymer-Modified Bitumens

2011 ◽  
Vol 65 (7) ◽  
pp. 765-770 ◽  
Author(s):  
Iliya Yut ◽  
Adam Zofka
Keyword(s):  
Fourier Transform ◽  
Ir Spectroscopy ◽  
Fourier Transform Infrared ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Use of Attenuated Total Reflection—Fourier Transform Infrared Spectroscopy to Measure Collagen Degradation in Historical Parchments

2008 ◽  
Vol 62 (10) ◽  
pp. 1108-1114 ◽  
Author(s):  
Lee Gonzalez ◽  
Tim Wess
Keyword(s):  
Fourier Transform ◽  
Ir Spectroscopy ◽  
Conformational Changes ◽  
Structural Changes ◽  
Fourier Transform Infrared ◽  
Collagen Degradation ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Developing a noninvasive method to assess the degraded state of historical parchments is essential to providing the best possible care for these documents. The conformational changes observed when collagen molecules, the primary constituent of parchment, unfold have been analyzed using attenuated total reflection–Fourier transform infrared (ATR-FT-IR) spectroscopy and the nanoscopic structural changes have been analyzed using X-ray diffraction (XRD). The relationship between the results obtained from these techniques was studied using principal component analysis, where correlation was found. The extent of gelatinization of historical parchments has been assessed using ATR-FT-IR and XRD and the frequency shifts observed as collagen degrades into gelatin have been reported. These results indicate that collagen degradation can be measured noninvasively in parchment and demonstrate the utility of ATR-FT-IR spectroscopy as a method to investigate historical documents.

Attenuated Total Reflection Fourier Transform Infrared (ATR FT-IR) Spectroscopy for the Quantitative Analysis of Deuterium in Plasma: Application to Total Body Water Determination in Humans and Other Animals

2021 ◽  
pp. 000370282110025
Author(s):  
Leigh C. Ward
Keyword(s):  
Fourier Transform ◽  
Ir Spectroscopy ◽  
Total Body Water ◽  
Fourier Transform Infrared ◽  
Total Reflection ◽  
Body Water ◽  
Attenuated Total Reflection ◽  
Ft Ir ◽  
Total Body ◽  
Ft Ir Spectroscopy

Conventional methods for measuring the concentration of deuterium in body fluids are by either isotope ratio mass spectrometry or Fourier transform infrared transmission (FT-IR) spectroscopy. The latter method is often preferred as it is less expensive and time consuming; however, having a lower sensitivity means a larger sample volume is required. This study investigated an alternative FT-IR spectroscopic method, attenuated total reflection Fourier transform infrared spectroscopy (ATR FT-IR), which has the potential to provide shorter analysis times while requiring smaller sample volumes. Deuterium was assayed using ATR FT-IR in plasma in the concentration range 0.5 to 2.5 mg mL−1, typical of those observed in tracer dilution measurements of total body water. Minimal sample preparation was required and analysis time was substantially decreased compared to transmission FT-IR. Samples were analyzed with high precision (coefficient of variation (CV) < 0.5%). Precision of assay was maintained when assaying plasma volumes of only 10 µL . The application of the method to the determination of total body water in humans and animals (horses) was demonstrated. A rapid and simple method for the measurement of deuterium in plasma is described that only requires very small sample volumes, rendering the method suitable for use in pediatrics where blood sampling is required to be kept to a minimum.

Forensic Hair Differentiation Using Attenuated Total Reflection Fourier Transform Infrared (ATR FT-IR) Spectroscopy

2016 ◽  
Vol 70 (7) ◽  
pp. 1109-1117 ◽  
Author(s):  
Jeremy Manheim ◽  
Kyle C. Doty ◽  
Gregory McLaughlin ◽  
Igor K. Lednev
Keyword(s):  
Fourier Transform ◽  
Ir Spectroscopy ◽  
Fourier Transform Infrared ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Ft Ir ◽  
Ft Ir Spectroscopy
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