Abstract

Griffiths and co-workers demonstrated that diffuse reflectance infrared spectroscopy (DRIFTS) can be used to study solids as mixtures with KCl and as samples deposited from solutions, and we have devised a sampling accessory for obtaining DRIFT spectra of multiple samples which is more convenient than making KBr pellets, cast films, or even thin films. Very often the analyst is required to obtain spectra of a large number of samples, and generally these samples must be prepared and analyzed one at a time. The multiple sample accessory shown in Fig. 1 enables us to complete the sample preparation prior to recording any spectra. In this way, valuable instrument time is more efficiently utilized, and the necessity of disruputing the instrument's purge between each sampling is minimized. The accessory is small enough to fit through a ½" diameter hole in the purge shield, so even though the purge is not "perfect," it is constant.

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