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ISO 25475:2016 Fertilizers — Determination of ammoniacal nitrogen
ISO 25705:2016 Fertilizers — Determination of urea condensates using high-performance liquid chromatography (HPLC) — Isobutylidenediurea and crotonylidenediurea (method A) and methylen-urea oligomers (method B)
ISO 18643:2016 Fertilizers and soil conditioners — Determination of biuret content of urea-based fertilizers — HPLC method
ISO 18644:2016 Fertilizers and soil conditioners — Controlled-release fertilizer — General requirements
ISO 27105:2016 Milk and cheese — Determination of hen's egg white lysozyme content by high performance liquid chromatography
ISO 8968-4:2016 Milk and milk products — Determination of nitrogen content — Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)
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