US Patent 7597936 Method of producing a pigmented composite microporous material

Disclosed is a method for producing a pigmented composite comprising contacting a microporous material with a tin compound to form a composite then contacting the composite with a pigment comprising an elemental metal, a metal oxide, a metal alloy, a metal salt, or a combination thereof to produce the pigmented composite. The pigmented composites described herein are useful for separating one or more analytes present in a fluid sample.