21. Sludge, treated biowaste and soil. Determination of Kjeldahl nitrogen. (30th September 2012) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (16 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
22. Soil quality. Chemical methods. Determination of total nitrogen. Modified Kjeldahl method Part 3.7, (15th October 1995) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (10 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
23. Starches and derived products. Determination of nitrogen content by the Kjeldahl method. Spectrometric method. (15th November 1994) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (12 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
24. Starches and derived products. Determination of nitrogen content by the Kjeldahl method. Titrimetric method. (15th November 1994) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (12 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
25. Tracked Changes. Meat and meat products. Determination of nitrogen content. Reference method. (19th September 2023) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (33 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
26. Water quality. Determination of Kjeldahl nitrogen. Method after mineralization with selenium. (15th November 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (12 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗