![]() ![]() The ignition loss is determined with the substance that has previously been dried for 2 hours at 105oC. Precipitated silica contains chemically bonded water in the form silanol groups is also removed after 2 hours of ignition time at 1000oC. ![]() The major part of this water content is removed by drying in drying cabinet at 105oC for 2 hours. There is very small amount of physically bonded water content in precipitated silica. It is determined electrometrically with a glass electrode and pH meter. The pH value of precipitated silica is generally in neutral range. This method of calculating the surface area is popularly known as BET surface area. Physico Chemical Characteristics of Precipitated Silicaīrunauer, Emmett and Teller developed the process of calculating the surface area of precipitated silica.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |