The NCS mode determines total nitrogen, carbon and sulphur simultaneously from 0.01% (0.05% for sulphur) to high percentage levels. The method is reliable for almost all organic and inorganic compounds and is often applied to the analysis of plant material, animal tissue and soil samples where hydrogen analysis is not required. The method has some of the drawbacks of the CHNS method but can run slightly larger samples as it is not prone to water saturation. Where sulphur is required at levels of less than 0.05% the sulphur method should be selected which allows the use of even larger samples or the more sensitive flame photometric detector (FPD).
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