{"id":317575,"date":"2024-10-19T21:55:15","date_gmt":"2024-10-19T21:55:15","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iso-21078-12008\/"},"modified":"2024-10-25T20:10:49","modified_gmt":"2024-10-25T20:10:49","slug":"bs-en-iso-21078-12008","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iso-21078-12008\/","title":{"rendered":"BS EN ISO 21078-1:2008"},"content":{"rendered":"

This part of ISO 21078 specifies methods of determining boron(III) oxide in refractory products and raw materials, in mass fractions of 0,01 % or greater. It is applicable to the determination of total boron(III) oxide in oxidic materials for ceramics, glass and glazes.<\/p>\n

The determination of boron(III) oxide is carried out using one of the following four methods:<\/p>\n

    \n
  1. \n

    alkaline titrimetry, which is applied to samples containing more than 0,5 % by mass of boron(III) oxide;<\/p>\n<\/li>\n

  2. \n

    azomethine H absorption spectrophotometry, which is applied to samples containing from 0,01 % by mass to 2,5 % by mass of boron(III) oxide;<\/p>\n<\/li>\n

  3. \n

    curcumin absorption spectrophotometry (rothocyanine method), which is applied to samples containing from 0,01 % by mass to 1,0 % by mass of boron(III) oxide;<\/p>\n<\/li>\n

  4. \n

    inductively coupled plasma atomic emission spectrometry (ICP-AES), which is applied to samples containing from 0,01 % by mass to 15 % by mass of boron(III) oxide.<\/p>\n<\/li>\n<\/ol>\n

    \n

    NOTE 1 The method can be extended to 30 % boron(III) oxide using modified oxidic fluxes.<\/p>\n<\/blockquote>\n

    \n

    NOTE 2 Interlaboratory test results for this part of ISO 21078 are given in Annex A.<\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"

    Determination of boron (III) oxide in refractory products – Determination of total boron (III) oxide in oxidic materials for ceramics, glass and glazes<\/b><\/p>\n\n\n\n\n
    Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
    BSI<\/b><\/a><\/td>\n2008<\/td>\n26<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":317578,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1156,2641],"product_tag":[],"class_list":{"0":"post-317575","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-81-040-01","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/317575","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\/317578"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=317575"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=317575"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=317575"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}