BSI PD CEN/TS 16490:2013
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Fertilizers. Comparison of the CEN/TC 260/WG 7 ring test results with tolerances given in the Regulation (EC) Nr 2003/2003 Annex II and conclusions
Published By | Publication Date | Number of Pages |
BSI | 2013 | 38 |
In Regulation (EC) No. 2003/2003 [2] tolerance limits are mentioned for nutrient contents in mineral fertilizers (Annex II of Regulation (EC) No. 2003/2003) as well as prescribed methods for control purposes (Annex IV of Regulation (EC) No. 2003/2003).
Prior to the work done by CEN/TC 260 following Mandate M/335, no statistical data were available for the official analytical methods to be applied. Due to the standardization work done for this mandate, statistical data have been generated as ring testing was a major topic in this mandate.
This Technical Specification describes to what extent the presently applied tolerances are in line with the obtained precision data from the analytical methods studied.
The purpose of this document is to give feedback on the applied tolerances within Regulation (EC) No. 2003/2003 based on the method evaluation done as an outcome of the work executed by CEN/TC 260/WG 7 according to Mandate M/335. This evaluation of the tolerances was part of Mandate M/418.
PDF Catalog
PDF Pages | PDF Title |
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7 | 1 Scope 2 Normative references 3 Terms and definitions |
8 | 4 Statistical method validation 4.1 General 4.2 Approach taken by CEN/TC 260/WG 7 4.2.1 Product selection 4.2.2 Samples and their preparation 4.2.3 Laboratories involved 4.2.4 Data evaluation 4.3 Statistical data: results versus tolerances |
9 | 4.4 Refined statistical analysis 4.5 Field data |
10 | 5 Conclusions |
12 | Annex A (informative) Statistical data of the inter-laboratory tests and findings A.1 General A.2 Nitrogen |
15 | A.3 Phosphate |
17 | A.4 Potassium A.5 Sulfur |
20 | A.6 Chloride A.7 Secondary nutrients A.7.1 Manganimetric determination of extracted calcium following precipitation in the form of oxalate (EC method 8.6, EN 16196) |
22 | A.7.2 Determination of magnesium by atomic absorption spectrometry (EC method 8.7, EN 16197) |
24 | A.7.3 Determination of magnesium by complexometry (EC method 8.8, EN 16198) |
25 | A.7.4 Determination of extracted sodium flame-emission spectrometry (EC method 8.10, EN 16199) |
28 | Annex B (informative) Refined statistical evaluation B.1 General B.2 Meaning of symbols |
29 | B.3 Tolerances for SO3 |
30 | B.4 Tolerances for CaO, MgO. Na2O and Cl |
34 | B.5 Refinement of results B.6 Comments |