Skip to main content

Ultramicrosampling in Infrared Spectroscopy Using Small Apertures

Buy Article:

$29.00 plus tax (Refund Policy)


A method for obtaining IR spectra from submicrogram quantities of polymeric materials, with minimum sample preparation, using small apertures, is described. Spectra were obtained for thin films and fibers with the use of three FT-IR instruments: a research-grade spectrometer and two low-cost "bench top" spectrometers. The quality of the spectra obtained are evaluated in terms of the instrument type, detector, accumulation times, and the dimensions of the aperture. A usable spectrum was obtained from as little as 2 ng of poly-(ethylene terephthalate) with the use of the research-grade instrument, which employed a cooled MCT detector. Spectra were readily obtained from the low-cost instrument with the use of a standard TGS detector from ~500 ng of material and were of sufficient quality for identification purposes. It would seem that energy limitations, diffraction effects, and long accumulation times would limit the utilization of apertures of less than 10 microns in diameter.

Keywords: Analysis; FT-IR; Fibers; Polymers; Ultra microsampling

Document Type: Research Article


Affiliations: 1: Metropolitan Police Forensic Science Laboratory, 109 Lambeth Road, London SE1 7LP, UK 2: Imperial Chemical Industries PLC, Research and Technology Department, Petrochemicals and Plastics Division, PO Box No 90, Wilton, Middlesbrough, Cleveland TS6 8JE, UK

Publication date: January 1, 1985

More about this publication?

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more
Real Time Web Analytics