Pickering Laboratories, Inc. has manufactured columns, high-purity reagents, and post-column derivatizers that enable specialized analysis with High-Performance Liquid Chromatography. Supported methods include, 35 N-Methyl Carbamates, Glyphosate and AMPA, Paraquat/Diquat, Bromate in Water. Pickering`s Derivatization instrument connects to virtually any HPLC.