packed bed liquid chromatography column

Chemical preparations, namely, chromatography chemicals in the nature of sorbent and support materials, for use in solid phase extraction as chromatography column packing media in gas chromatography and/or air monitoring

Chemical preparations, namely, sorbent materials, supports, and stationary phases for use in gas chromatography and/or air monitoring

Chemical products, namely, chemical preparations for use in industry, science, photography, agriculture, horticulture and forestry; unprocessed artificial resins, unprocessed plastics; fire extinguishing and fire prevention compositions; tempering and soldering preparations; adhesives for use in industry; putties and other paste fillers, namely, oil cement putty; composts, manures, fertilizers; biological preparations for use in industry and science; carbon