{"id":451025,"date":"2024-10-20T09:15:32","date_gmt":"2024-10-20T09:15:32","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-178642023\/"},"modified":"2024-10-26T17:15:06","modified_gmt":"2024-10-26T17:15:06","slug":"bs-en-178642023","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-178642023\/","title":{"rendered":"BS EN 17864:2023"},"content":{"rendered":"

This document specifies a method for the determination of nitrogen content in IBDU (isobutylidenediurea) and CDU (crotonylidenediurea) using high-performance liquid chromatography (HPLC). The method is applicable to all fertilizers which do not contain interfering organic compounds.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nundefined <\/td>\n<\/tr>\n
5<\/td>\nEuropean foreword <\/td>\n<\/tr>\n
6<\/td>\n1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus and equipment <\/td>\n<\/tr>\n
7<\/td>\n7 Sampling and sample preparation
8 Procedure
8.1 General
8.2 Calibration
8.2.1 Stock solution IBDU, mass concentration \u03c1(IBDU) = 100 mg\/l
8.2.2 Stock solution CDU, \u03c1(CDU) = 100 mg\/l
8.2.3 Calibration solutions <\/td>\n<\/tr>\n
8<\/td>\nTable 1 \u2014 Preparation of calibration solutions
8.3 Preparation of the test solution
8.4 Measurement
9 Calculation and expression of the result <\/td>\n<\/tr>\n
9<\/td>\n10 Precision
10.1 Inter-laboratory tests
10.2 Repeatability
10.3 Reproducibility
Table 2 \u2014 Mean values, repeatability and reproducibility limits
11 Test report <\/td>\n<\/tr>\n
10<\/td>\nAnnex A (informative) Results of the inter-laboratory tests
Table A.1 \u2014 Statistical results of the inter-laboratory tests <\/td>\n<\/tr>\n
11<\/td>\nAnnex B (informative) Example chromatogram and calibration curves
B.1 Example chromatogram
Figure B.1 \u2014 Example chromatogram
B.2 Example calibration curves <\/td>\n<\/tr>\n
12<\/td>\nFigure B.2 \u2014 Example calibration curve CDU
Figure B.3 \u2014 Example calibration curve IBDU <\/td>\n<\/tr>\n
13<\/td>\nAnnex C (informative) Example conditions for a suitable HPLC system <\/td>\n<\/tr>\n
14<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Inorganic fertilizers. Determination of nitrogen content in IBDU (isobutylidenediurea) and CDU (crotonylidenediurea)<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2023<\/td>\n16<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":451032,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-451025","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/451025","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/451032"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=451025"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=451025"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=451025"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}