An Adjustable Infra-Red Absorption Cell for Liquids

Abstract

The use of foil or mica washers to regulate absorption cell thicknesses renders difficult the rapid preparation of thin films of liquids of a determined thickness. The device described here regulates cell thickness by means of a micrometer screw and wedge arrangement. Films of non-volatile liquids are readily prepared to within 1 micron, up to about 200 microns, without estimation.