This document specifies two methods for the determination of the neutralizing value (NV) of liming materials.<\/p>\n
Method A is applicable to all liming materials except silicate liming materials.<\/p>\n
Examples of hard liming materials are limestone and dolomite. Examples of soft liming materials are chalk, marl and burnt lime.<\/p>\n<\/div>\n
Method B is applicable to all liming materials.<\/p>\n
Neither method correctly takes into account the potential neutralizing value of material containing more than 3 % P2<\/sub>O5<\/sub>. For a more accurate agronomic assessment of products containing more than 3 % P2<\/sub>O5<\/sub>, EN 14984<\/span><\/span>[<\/sup> 8<\/sup><\/span>]<\/sup> is used to determine the liming efficiency.<\/p>\n The methods described in ISO 6598<\/span><\/span> and ISO 7497<\/span><\/span> can be used for the determination of P 2<\/sub>O 5<\/sub> content. Further information on P analyses is given in References [ 5<\/span>] and [ 6<\/span>].<\/p>\n<\/div>\n Carbonate consumes H +<\/sup> and removes acidity in solution with subsequent dissociation to H 2<\/sub>O and CO 2<\/sub>. Forms of orthophosphate can consume H +<\/sup> but are not dissociated to molecular forms that remove acidity. The acidity is back titrated with alkali causing an underestimation of NV.<\/p>\n<\/div>\n Liming material. Determination of neutralizing value. Titrimetric methods<\/b><\/p>\nPDF Catalog<\/h4>\n
\n
\n PDF Pages<\/th>\n PDF Title<\/th>\n<\/tr>\n \n 2<\/td>\n National foreword <\/td>\n<\/tr>\n \n 6<\/td>\n Foreword <\/td>\n<\/tr>\n \n 7<\/td>\n Introduction <\/td>\n<\/tr>\n \n 9<\/td>\n 1 Scope
2 Normative references
3 Terms and definitions
4 Principle <\/td>\n<\/tr>\n\n 10<\/td>\n 5 Reagents <\/td>\n<\/tr>\n \n 11<\/td>\n 6 Apparatus
7 Sampling
8 Procedure
8.1 Preparation of the test sample
8.2 Determination
8.2.1 Method A <\/td>\n<\/tr>\n\n 12<\/td>\n 8.2.2 Method B
9 Calculation and expression of results for method A and method B <\/td>\n<\/tr>\n\n 13<\/td>\n 10 Precision
10.1 General <\/td>\n<\/tr>\n\n 14<\/td>\n 10.2 Repeatability
10.3 Reproducibility <\/td>\n<\/tr>\n\n 15<\/td>\n 11 Test report <\/td>\n<\/tr>\n \n 16<\/td>\n Annex A (informative) Results of an interlaboratory trial to determine the neutralizing value <\/td>\n<\/tr>\n \n 17<\/td>\n Annex B (informative) Conversion tables <\/td>\n<\/tr>\n \n 23<\/td>\n Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" \n\n
\n Published By<\/td>\n Publication Date<\/td>\n Number of Pages<\/td>\n<\/tr>\n \n BSI<\/b><\/a><\/td>\n 2020<\/td>\n 24<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":291218,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-291213","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\/291213","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\/291218"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=291213"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=291213"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=291213"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}