Protect your analytical HPLC column from damage caused by sample debris and interfering substances. It's the economical way to extend the lifetime of your analytical column with minimal impact on performance. Use Thermo Scientific™ Acclaim™ Mixed-Mode WAX-1 Guard Columns with Acclaim Mixed-Mode WAX-1 HPLC columns, which offer reversed-phase and cation exchange chromatography combined in a single column. Select the guard column that best matches your analytical column I.D. and particle size. Guard column replacement is quick and easy, with a re-usable Acclaim Guard Cartridge Holder.