HPLC COLUMNS AND UHPLC COLUMNS. Scroll down to purchase! Chrom Tech is a HPLC column supplier and an authorized distributor for Aijiren Technologies, Concise Separations, Hamilton, Imtakt USA, Jordi Labs, Regis, Restek, Millipore Sigma, Thermo Scientific, HiChrom, and more. We offer reliable columns, backed by support from our many manufacturers.