Transient infrared transmission spectroscopy

Journal Article · Mon Oct 15 00:00:00 EDT 1990 · Analytical Chemistry (Washington); (USA)

DOI:https://doi.org/10.1021/ac00219a018· OSTI ID:6105441

Jones, R W; McClelland, J F ^[1]

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1. Iowa State Univ., Ames (USA)

Transient infrared transmission spectroscopy is a new method that can acquire analytically useful transmission spectra from moving, optically thick solids. No sample preparation is required. The spectra are of sufficient quality for accurate quantitative compositional analysis. The method works by the creation of a thin, short-lived, chilled layer at the sample surface. Blackbody-like thermal emission from the bulk of the sample is selectively absorbed as it passes through the chilled layer, so the transmission spectrum of the layer is superimposed on the observed thermal emission. Spectra of polycarbonate, beeswax, and copolymers of methyl and butyl methacrylate are presented. Compositional analysis of the methacrylate copolymers with a standard error or prediction of only 0.87 mol % is demonstrated.

• OSTI ID: 6105441
• Journal Information: Analytical Chemistry (Washington); (USA), Vol. 62:20; ISSN 0003-2700
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
METHYL METHACRYLATE
INFRARED SPECTRA
POLYCARBONATES
DATA ANALYSIS
EXPERIMENTAL DATA
INFRARED SPECTROMETERS
MEASURING METHODS
CARBON COMPOUNDS
CARBONATES
CARBOXYLIC ACID ESTERS
DATA
ESTERS
INFORMATION
MEASURING INSTRUMENTS
METHACRYLIC ACID ESTERS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
SPECTRA
SPECTROMETERS
400102* - Chemical & Spectral Procedures