Prevent Hydrocarbon Background Interference During SEM Sample Prep How do I prevent hydrocarbon background interferences when performing secondary ion mass spectrometry during SEM sample preparation? Case Study A recently renovated geophysical science laboratory in a large Midwestern research university took delivery of a new FIB/FESEM and, with it, sought ways to maximize use and results from their new instrument when preparing samples for microanalysis. With many of their primary applications pertaining to earth science study, they routinely coated and polished sections of rocks and meteorites, and mounts of tiny, sometimes submicron, grains. While in preparing samples for microanalysis, these geologists most commonly coated samples with carbon or gold (carbon minimizes interferences in

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