The N mode determines total nitrogen from 0.001% (depending on sample types and weights) to high percentage levels. Protein can also be determined by this method. The use of large combustion tubes fitted to the elemental analyser allows protein determination on higher weights. The method is reliable for almost all organic and inorganic compounds and is ideally suited to the analysis of plant material, animal tissue and soil samples. The N method has almost unlimited resolution of the nitrogen which allows the analysis of much larger samples.
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