Abstract
We report the development of a new chromatographic method for surface characterization, based on the principle of gas chromatographic intermediate surface testing. In this method, the chromatograms are obtained in parallel in a dual-oven chromatograph with a pneumatic switching valve. This is an unusual application of a dual-oven gas chromatograph and column switching, not previously reported. The method is fast, produces data that are more readily interpretable, and can provide information difficult or impossible to obtain with the previously developed single-oven, unswitched, sequential test. These new attributes make intermediate surface testing a simple, straightforward, and generally applicable method for studying chemical interactions at the gas-solid interface of low-surface-area materials.
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