{"id":290985,"date":"2024-10-19T19:45:10","date_gmt":"2024-10-19T19:45:10","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-166512015\/"},"modified":"2024-10-25T16:46:14","modified_gmt":"2024-10-25T16:46:14","slug":"bs-en-166512015","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-166512015\/","title":{"rendered":"BS EN 16651:2015"},"content":{"rendered":"<p>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).<\/p>\n<h4>PDF Catalog<\/h4>\n<table border=\"1px\" class=\"des-table\">\n<tr>\n<th>PDF Pages<\/th>\n<th>PDF Title<\/th>\n<\/tr>\n<tr>\n<td><b>5<b><\/td>\n<td>Foreword  <\/td>\n<\/tr>\n<tr>\n<td><b>6<b><\/td>\n<td>1 Scope <br \/> 2 Normative references <br \/> 3 Terms and definitions <br \/> 4 Principle <br \/> 5 Reagents  <\/td>\n<\/tr>\n<tr>\n<td><b>7<b><\/td>\n<td>6 Apparatus  <\/td>\n<\/tr>\n<tr>\n<td><b>8<b><\/td>\n<td>Table 1 \u2014 Example of HPLC conditions a <br \/> 7 Sampling <br \/> 8 Procedure <br \/> 8.1 Preparation of the test solution <br \/> 8.2 Calibration <br \/> 8.3 Blank test <br \/> 8.4 Calculation and expression of the results\ufeff0F ) <br \/> 8.4.1 Concentration of NBPT  <\/td>\n<\/tr>\n<tr>\n<td><b>9<b><\/td>\n<td>8.4.2 Concentration of NPPT <br \/> 8.4.3 External response factors  <\/td>\n<\/tr>\n<tr>\n<td><b>10<b><\/td>\n<td>8.4.4 Calculation of the total content <br \/> 8.5 Environmental aspects <br \/> 9 Precision <br \/> 9.1 Inter-laboratory test <br \/> 9.2 Repeatability <br \/> 9.3 Reproducibility  <\/td>\n<\/tr>\n<tr>\n<td><b>11<b><\/td>\n<td>Table 2 \u2014 NPPT: Mean values, repeatability and reproducibility limits <br \/> Table 3 \u2014 NBPT: Mean values, repeatability and reproducibility limits <br \/> 10 Test report  <\/td>\n<\/tr>\n<tr>\n<td><b>12<b><\/td>\n<td>Annex A  (informative)  Results of the inter-laboratory test <br \/> Table A.1 \u2014 Statistical results of the inter-laboratory trial for NPPT <br \/> Table A.2 \u2014 Statistical results of the inter-laboratory trial for NBPT  <\/td>\n<\/tr>\n<tr>\n<td><b>13<b><\/td>\n<td>Bibliography  <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p><b>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)<\/b><\/p>\n<table class=\"shortdes-table\" style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/bsi\/\"><b>BSI<\/b><\/a><\/td>\n<td>2015<\/td>\n<td>16<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":290990,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-290985","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\/290985","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\/290990"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=290985"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=290985"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=290985"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}