BS EN 16651:2015
$102.76
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)
| Published By | Publication Date | Number of Pages |
| BSI | 2015 | 16 |
This European Standard specifies a method for the quantitative determination of the urease inhibitors N-(n-Butyl)thiophosphoric acid triamide (NBPT, CAS-No. 94317-64-3) and N-(n-Propyl)thiophosphoric acid triamide (NPPT, CAS-No. 916809-14-8) content in urea based fertilizers using high-performance liquid chromatography (HPLC).
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 5 | Foreword |
| 6 | 1 Scope 2 Normative references 3 Terms and definitions 4 Principle 5 Reagents |
| 7 | 6 Apparatus |
| 8 | Table 1 — Example of HPLC conditions a 7 Sampling 8 Procedure 8.1 Preparation of the test solution 8.2 Calibration 8.3 Blank test 8.4 Calculation and expression of the results0F ) 8.4.1 Concentration of NBPT |
| 9 | 8.4.2 Concentration of NPPT 8.4.3 External response factors |
| 10 | 8.4.4 Calculation of the total content 8.5 Environmental aspects 9 Precision 9.1 Inter-laboratory test 9.2 Repeatability 9.3 Reproducibility |
| 11 | Table 2 — NPPT: Mean values, repeatability and reproducibility limits Table 3 — NBPT: Mean values, repeatability and reproducibility limits 10 Test report |
| 12 | Annex A (informative) Results of the inter-laboratory test Table A.1 — Statistical results of the inter-laboratory trial for NPPT Table A.2 — Statistical results of the inter-laboratory trial for NBPT |
| 13 | Bibliography |
