{"id":317716,"date":"2024-10-19T21:55:54","date_gmt":"2024-10-19T21:55:54","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iso-21068-22008\/"},"modified":"2024-10-25T20:12:00","modified_gmt":"2024-10-25T20:12:00","slug":"bs-en-iso-21068-22008","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iso-21068-22008\/","title":{"rendered":"BS EN ISO 21068-2:2008"},"content":{"rendered":"<p>This part of ISO&nbsp;21068 specifies analytical techniques for the determination of change in mass by thermal treatment at specified temperatures, and methods for the determination of the total carbon content, free carbon, silicon carbide, silicon, total silica and free silica content of silicon-carbide-containing raw materials and refractory products.<\/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>9<b><\/td>\n<td>Scope <br \/> Normative references <br \/> Terms and definitions  <\/td>\n<\/tr>\n<tr>\n<td><b>10<b><\/td>\n<td>Determination of change in mass <br \/> General <br \/> Determination of the loss on drying at 250\u00a0\u00b0C (LOD250) gravi <br \/> Principle <br \/> Apparatus <br \/> Procedure  <\/td>\n<\/tr>\n<tr>\n<td><b>11<b><\/td>\n<td>Calculation <br \/> Determination of the loss on calcination in argon (LOIAr) <br \/> Principle <br \/> Apparatus  <\/td>\n<\/tr>\n<tr>\n<td><b>12<b><\/td>\n<td>Reagents <br \/> Procedure <br \/> Check of test assembly, blank value determination <br \/> Determination  <\/td>\n<\/tr>\n<tr>\n<td><b>13<b><\/td>\n<td>Calculation <br \/> Determination of the change in mass by heat pretreatment in   <\/td>\n<\/tr>\n<tr>\n<td><b>14<b><\/td>\n<td>Determination of the change in mass at 750\u00a0\u00b0C (LOI750) <br \/> Principle <br \/> Apparatus <br \/> Procedure <br \/> Calculation  <\/td>\n<\/tr>\n<tr>\n<td><b>15<b><\/td>\n<td>Determination of loss on ignition at 850\u00a0\u00b0C (LOI850) <br \/> Apparatus <br \/> Platinum dish, platinum or porcelain (e.g. Type\u00a0B 20\u00a0ml). <br \/> Procedure <br \/> Calculation <br \/> Determination of loss on ignition at 1\u00a0050\u00a0\u00b0C (LOI1\u00a0050) <br \/> Principle <br \/> Apparatus <br \/> Crucible, platinum or porcelain (e.g. Type\u00a0B 20\u00a0ml). <br \/> Procedure  <\/td>\n<\/tr>\n<tr>\n<td><b>16<b><\/td>\n<td>Calculation <br \/> Determination of the total carbon content <br \/> General  <\/td>\n<\/tr>\n<tr>\n<td><b>17<b><\/td>\n<td>Combustion techniques <br \/> General <br \/> Resistance furnace in oxygen and lead borate as decomposing  <br \/> Principle <br \/> Reagents <br \/> Apparatus  <\/td>\n<\/tr>\n<tr>\n<td><b>18<b><\/td>\n<td>Setting up of test assembly <br \/> Procedure for RF combustion with lead borate <br \/> Resistance furnace in oxygen and tin powder as decomposing a <br \/> Principle <br \/> Reagents <br \/> Apparatus  <\/td>\n<\/tr>\n<tr>\n<td><b>19<b><\/td>\n<td>Setting up of test assembly <br \/> Procedure of RF combustion with tin powder <br \/> Induction furnace (IF) in oxygen and metallic powder as deco <br \/> Principle <br \/> Reagents  <\/td>\n<\/tr>\n<tr>\n<td><b>20<b><\/td>\n<td>Apparatus <br \/> Set-up of test assembly <br \/> Procedure of induction furnace (IF) combustion <br \/> Detection techniques <br \/> Coulometry  <\/td>\n<\/tr>\n<tr>\n<td><b>21<b><\/td>\n<td>Gravimetry using resistance furnace  <\/td>\n<\/tr>\n<tr>\n<td><b>22<b><\/td>\n<td>Gravimetry using high-frequency induction furnace  <\/td>\n<\/tr>\n<tr>\n<td><b>23<b><\/td>\n<td>Conductometry <br \/> Infrared (IR) method and resistance furnace (RF) combustion  <\/td>\n<\/tr>\n<tr>\n<td><b>24<b><\/td>\n<td>Thermal conductivity (TC) method and induction furnace (IF)   <\/td>\n<\/tr>\n<tr>\n<td><b>25<b><\/td>\n<td>Detection methods <br \/> Resistance furnace method with coulometric detection of the  <br \/> Combustion and detection <br \/> Reagents <br \/> Apparatus <br \/> Setting up the test assembly <br \/> Check of test assembly, blank value determination <br \/> Procedure  <\/td>\n<\/tr>\n<tr>\n<td><b>26<b><\/td>\n<td>Calculation <br \/> Resistance\/induction furnace method with gravimetric detecti <br \/> Combustion and detection <br \/> Reagents <br \/> Apparatus  <\/td>\n<\/tr>\n<tr>\n<td><b>27<b><\/td>\n<td>Setting up the test assembly <br \/> Check of test assembly, blank value determination <br \/> Procedure  <\/td>\n<\/tr>\n<tr>\n<td><b>28<b><\/td>\n<td>Calculation <br \/> Resistance furnace method with conductometric detection of r <br \/> Combustion and detection <br \/> Reagents <br \/> Apparatus <br \/> Setting up the test assembly <br \/> Check of test assembly, blank determination <br \/> Procedure  <\/td>\n<\/tr>\n<tr>\n<td><b>29<b><\/td>\n<td>Calculation <br \/> Resistance\/induction furnace method with detection of the re <br \/> Combustion and detection <br \/> Reagents <br \/> Apparatus <br \/> Setting up the test assembly <br \/> Check of test assembly, blank value determination <br \/> Procedure  <\/td>\n<\/tr>\n<tr>\n<td><b>30<b><\/td>\n<td>Calculation <br \/> Induction furnace combustion \u2014 Thermal conductivity method ( <br \/> Combustion and detection <br \/> Materials and reagents <br \/> Apparatus <br \/> Mass of test portion <br \/> Procedure  <\/td>\n<\/tr>\n<tr>\n<td><b>31<b><\/td>\n<td>Blank test <br \/> Calculation of calibration coefficient <br \/> Calculation  <\/td>\n<\/tr>\n<tr>\n<td><b>32<b><\/td>\n<td>Determination of free carbon content <br \/> General <br \/> Sample decomposition by combustion <br \/> General <br \/> Detection techniques <br \/> Direct detection methods <br \/> Principle <br \/> Determination of free carbon by coulometric method at 850\u00a0\u00b0C <br \/> Reagents <br \/> Apparatus <br \/> Set-up of test assembly  <\/td>\n<\/tr>\n<tr>\n<td><b>33<b><\/td>\n<td>Check of test assembly, blank value determination <br \/> Procedure <br \/> Calculation <br \/> Determination of free carbon by gravimetric method at 750\u00b0C <br \/> Reagents  <\/td>\n<\/tr>\n<tr>\n<td><b>34<b><\/td>\n<td>Apparatus <br \/> Set-up of test assembly <br \/> Check of test assembly, blank value determination <br \/> Procedure <br \/> Calculation  <\/td>\n<\/tr>\n<tr>\n<td><b>35<b><\/td>\n<td>Determination of free carbon by conductometric method at 850 <br \/> Reagents <br \/> Apparatus <br \/> Set-up of test assembly, blank value determination <br \/> Procedure <br \/> Calculation <br \/> Determination of free carbon by IR or TC method at 850\u00a0\u00b0C <br \/> Principle <br \/> Reagents <br \/> Apparatus  <\/td>\n<\/tr>\n<tr>\n<td><b>36<b><\/td>\n<td>Mass of test portion <br \/> Procedure <br \/> Blank test <br \/> Calculation of calibration coefficient <br \/> Calculation  <\/td>\n<\/tr>\n<tr>\n<td><b>37<b><\/td>\n<td>Indirect detection methods <br \/> Principle  <\/td>\n<\/tr>\n<tr>\n<td><b>38<b><\/td>\n<td>Indirect determination by change in mass during calcination  <br \/> Reagents <br \/> Apparatus <br \/> Procedure <br \/> Determining the change in mass on calcination in air <br \/> Determining the total carbon content of the residue on ignit <br \/> Determining the total carbon content of the starting materia <br \/> Calculation  <\/td>\n<\/tr>\n<tr>\n<td><b>39<b><\/td>\n<td>Precision <br \/> Indirect determination by weighing back the combustion boat  <br \/> Reagents <br \/> Apparatus  <\/td>\n<\/tr>\n<tr>\n<td><b>40<b><\/td>\n<td>Procedure <br \/> Calculation <br \/> Determination of free carbon by calculation  <\/td>\n<\/tr>\n<tr>\n<td><b>41<b><\/td>\n<td>Direct determination of free carbon by wet oxidation <br \/> Principle <br \/> Determination of silicon carbide content, SiC <br \/> General  <\/td>\n<\/tr>\n<tr>\n<td><b>42<b><\/td>\n<td>Determination of silicon carbide, SiC, by indirect quantitat <br \/> Principle <br \/> Calculation <br \/> Determination of silicon carbide, SiC, by direct quantitativ <br \/> Principle <br \/> Reagents <br \/> Apparatus <br \/> Test portion  <\/td>\n<\/tr>\n<tr>\n<td><b>43<b><\/td>\n<td>Procedure <br \/> Blank test <br \/> Calculation of calibration coefficient <br \/> Calculation <br \/> Determination of silicon carbide, SiC, by ignition method at <br \/> Principle  <\/td>\n<\/tr>\n<tr>\n<td><b>44<b><\/td>\n<td>Ash production <br \/> Determination of carbon in ash <br \/> Calculation <br \/> Determination of silicon carbide, SiC, by chemical method  <\/td>\n<\/tr>\n<tr>\n<td><b>45<b><\/td>\n<td>Principle <br \/> Reagents <br \/> Apparatus <br \/> Procedure  <\/td>\n<\/tr>\n<tr>\n<td><b>46<b><\/td>\n<td>Calculation <br \/> Determination of total silicon content via silica <br \/> Principle <br \/> Reagents <br \/> Apparatus  <\/td>\n<\/tr>\n<tr>\n<td><b>47<b><\/td>\n<td>Procedure <br \/> Blank test  <\/td>\n<\/tr>\n<tr>\n<td><b>48<b><\/td>\n<td>Calculation <br \/> Determination of free silicon content <br \/> Principle <br \/> Pretreatment with hydrochloric acid <br \/> Silicon determination by hydrogen evolution <br \/> Principle <br \/> Reagents  <\/td>\n<\/tr>\n<tr>\n<td><b>49<b><\/td>\n<td>Apparatus <br \/> General <br \/> Mass of test portion  <\/td>\n<\/tr>\n<tr>\n<td><b>50<b><\/td>\n<td>Procedure  <\/td>\n<\/tr>\n<tr>\n<td><b>51<b><\/td>\n<td>Blank test <br \/> Calculation <br \/> Silicon determination by silver displacement <br \/> Principle <br \/> Pretreatment  <\/td>\n<\/tr>\n<tr>\n<td><b>52<b><\/td>\n<td>Reagents <br \/> Apparatus <br \/> Procedure <br \/> Determination of wSi free by silver displacement <br \/> Reagents <br \/> Apparatus <br \/> Procedure  <\/td>\n<\/tr>\n<tr>\n<td><b>53<b><\/td>\n<td>Blank test <br \/> Calculation <br \/> Determination of silica content, SiO2 <br \/> General <br \/> Determination of free and\/or combined silica content, SiO2  <\/td>\n<\/tr>\n<tr>\n<td><b>54<b><\/td>\n<td>Determination of free silica, SiO2 <br \/> Determination of surface silicon dioxide, SiO2 <br \/> Expression of results <br \/> Test report  <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p><b>Chemical analysis of silicon-carbide-containing raw materials and refractory products &#8211; Determination of loss on ignition, total carbon, free carbon and silicon carbide, total and free silica and total and free silicon<\/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>2008<\/td>\n<td>58<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":317723,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-317716","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\/317716","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\/317723"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=317716"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=317716"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=317716"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}