BS EN 16651:2015 : Title: Fertilizers. Determination of N-(n-Butyl)thiophosphoric acid triamide (NBPT) and N-(n-Propyl)thiophosphoric acid triamide (NPPT). Method using high-performance liquid chromatography (HPLC) Pages: 16 Year: Publisher: British Standards Institution Availability: Within 1-2 working days
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