BET Surface Area by Nitrogen and Krypton Adsorption The surface area of a material will often profoundly effect its behaviour and performance, whatever its application, and will commonly be a critical parameter to consider when preparing or procuring a material. For example, surface area can be used to directly determine factors such as reactivity, adsorption capacity, dissolution rate, electrochemical performance and burning / sintering ability. Knowledge and control of surface area is often crucial at all stages of formulation, manufacture and ongoing QC processes.  Surface area, also termed Specific Surface Area (SSA), is most commonly measured by the BET (Brunauer-Emmett-Teller) method through the gas adsorption technique. For the majority of samples nitrogen adsorption is used, but for very low surface area materials a krypton adsorption option is also available. Key Information • Surface area is a critical parameter for formulation, production and performance. • Surface area often affects material performance • Surface area is often critical to material selection • BET Surface Area by Nitrogen adsorption • BET Surface area by Krypton adsorption for low area materials • Comprehensive degassing options available to suit specific requirements • Volumetric technique using state-of-the-art Micromeritics TriStar II 3020 • Single point and multipoint measurement options available • Flowing gas method available where required • Argon adsorption option available • Carbon dioxide and oxygen adsorption options available Sample   degassing   and   drying   immediately   prior   to   analysis   is   critical   to   ensure   that   samples   are   clean   and   dry.   This   is   undertaken   by   MCA and   a   range   of   options   are   available,   including   vacuum   and   flowing   gas   techniques   at   temperatures   from   ambient   to   400   °C   are   available   to ensure that samples are fully degassed without thermal degradation.   Nitrogen   adsorption   is   applicable   to   the   majority   of   sample   types.   However,   as   surface   area   becomes   particularly   low   nitrogen   fails   to provide   accurate   data   from   which   to   calculate   surface   area.   In   such   cases   a   krypton   adsorption   option   is   also   offered   which   is   capable   of measuring the geometric area of essentially non-porous materials. Analyses   are   usually   undertaken   using   the   most   recent   Micromeritics   TriStar   3020   instrument,   offering   a   multipoint   volumetric   technique. However,   a   flowing   gas   technique   and   single   point   measurement   options   are   also   available   which   provide   options   to   match   historical methods and data.