Hitachi?s LaChrom and LaChromUltra Columns combine eight unique surface chemistries on high purity silica including four C18 (octadecylsilane) chemistries. Three distinct particle sizes and a variety of popular column formats are available. Together with Hitachi UHPLC and HPLC systems, the breadth of the Hitachi column portfolio offers complete solutions to the most demanding chromatographic challenges.