Graphsphere^TM Adsorbent

215-609-9

SB.54

A spherical graphitized polymer carbon (SGPC) has an innovative structure; a porous or non-porous core (the carbon framework that remains after pyrolysis of polymeric precursor), and a graphitized shell of a controlled thickness. The graphitization process results in a highly pure surface with great adsorption and desorption (if required) properties. Surface interactions depend solely on dispersion (London) forces. These amorphous/graphitic adsorbents are:

• Spherical (better packed bed performance than granular particles)
• Hard and non-friable (pack well, will not break)
• Used for molecules with an analyte size relative to C5-C12 n-alkanes
• Hydrophobic (can be used in high humidity environments)

Generally, SGPC adsorbents offer weaker relative adsorptive strength compared to carbon molecular sieve (CMS) adsorbents, and similar relative adsorptive strength compared to graphitized carbon black (GCB) adsorbents. Our Graphsphere^™ products are a type of SGPC adsorbent. They are great alternatives to GCB adsorbents (which are granular and friable).

For more information about any of our specialty carbon adsorbents, please visit sigma-aldrich.com/carbon

Carboxen is a registered trademark of sigma-aldrich Co. LLC
Graphsphere is a trademark of sigma-aldrich Co. LLC

100

Formally Carboxen^® 1016

powder

bottle of 10 g

LPLC: suitable

Formally Carboxen^® 1016
Graphsphere^™ 2016

carbon

60-80 mesh

~0.34 cm³/g mesoporosity
~0 cm³/g macroporosity
~0 cm³/g microporosity
~0 Å pore diameter

~75 m²/g

~0.41 g/mL (free fall density)

sample preparation

reversed phase

GHS08

Warning

H351

P281

11 - Combustible Solids

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