Column, LC, Shodex IC SI-50G, Guard Column, Anion suppressed, 5um, 4.6 x 10mm. Guard column for anion analysis using a suppressor method. Suitable for quantitative analysis of fluoride. No interference by the system peak derived from carbonate. Functional Group = Quaternary Ammonium. Column is shipped in 3.2mM Na2CO3 + 1.0mM NaHCO3 Aq. Base material is Polyvinyl Alcohol with a housing made of PEEK.