DS DS/EN 15688
DS DSEN 15688 2008-SEP-23 Fertlzers - Determnaton of urease nhbtor N-n-butylthophosphorc tramde NBPT usng hgh-performance lqud chromatography HPLC
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This document specifies a method for the quantitative determination of the urease inhibitor N-(n-butyl)thiophosphoric triamide (NBPT) content in water-soluble matrices, i.e. urea based fertilizers using high performance liquid chromatography (HPLC). NOTE Pure NBPT reference material is required as a standard for the quantitative calibration.