{"id":402709,"date":"2024-10-20T05:02:32","date_gmt":"2024-10-20T05:02:32","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bsi-pd-cen-ts-17784-12022\/"},"modified":"2024-10-26T08:58:39","modified_gmt":"2024-10-26T08:58:39","slug":"bsi-pd-cen-ts-17784-12022","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bsi-pd-cen-ts-17784-12022\/","title":{"rendered":"BSI PD CEN\/TS 17784-1:2022"},"content":{"rendered":"

This document specifies two methods required for the identification of lignosulfonate by UV-Vis spectrophotometry (method A) and gravimetry (method B) in organo-mineral fertilizers. NOTE Lignosulfonate, as a complexing agent, is a natural polymer produced as a by-product of the sulfite method for manufacturing paper from wood pulp in the paper industry. As a natural polymer, it presents a poorly defined and variable chemical structure. It is an intricate mixture of small- to moderate-sized polymeric compounds with sulfonate groups attached to the molecule, and diverse complexing capacity.<\/p>\n

PDF Catalog<\/h4>\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
7<\/td>\n1 Scope
2 Normative references
3 Terms and definitions
4 Sampling and sample preparation
5 Method A: Determination of phenolic hydroxyl content and 232,5 nm absorbance for the identification of lignosulfonates
5.1 Principle <\/td>\n<\/tr>\n
8<\/td>\n5.2 Reagents
5.3 Apparatus <\/td>\n<\/tr>\n
9<\/td>\n5.4 Procedure
5.4.1 Preparation of stock solution
5.4.2 Solution A (acid)
5.4.3 Solution B (basic)
5.4.4 Solution C
5.4.5 Measurement of phenolic hydroxyl content
5.4.6 Measurement of 232,5 nm absorbance
5.5 Calculation
5.5.1 Phenolic hydroxyl content <\/td>\n<\/tr>\n
11<\/td>\n5.5.2 Lignosulfonic acid content calculated from 232,5 nm absorbance
6 Method B: Determination of organic sulfur content for the identification of lignosulfonates
6.1 Principle
6.2 Reagents <\/td>\n<\/tr>\n
12<\/td>\n6.3 Apparatus <\/td>\n<\/tr>\n
13<\/td>\n6.4 Procedure
6.4.1 Preparation of 0,5 mol\/l Iodine I2 solution
6.4.2 Separation of inorganic sulfur
6.4.3 Determination of organic sulfur <\/td>\n<\/tr>\n
14<\/td>\n6.5 Calculation
7 Expression of the results
7.1 Relative phenolic hydroxyl content <\/td>\n<\/tr>\n
15<\/td>\n7.2 Relative organic sulfur content
8 Test report <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Organo-mineral fertilizers. Identification of complexing agents. – Method using UV-Vis spectrophotometry and gravimetry<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2022<\/td>\n18<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":402716,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-402709","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\/402709","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\/402716"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=402709"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=402709"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=402709"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}