CategoryKjeldahl, Fat & Crude Fiber Apparatus Kjeldahl Nitrogen determination Nitrogen determination according to Kjeldahl The Kjeldahl method for nitrogen determination w.. Determination of fibers Fibers are an important element of human nutrition and are directly connected with the natural compo.. Crude fiber Fibers are an important element of human nutrition and are directly connected with the natural compo.. Extraction Extraction procedures (concretely: solid-liquid extraction process) are used to separated soluble co..