Ihe ntinye nke HPLC, mgbe ejiri ya na vial autosampler, na-enye ohere maka mgbake nlele kachasị yana iwepụ ihe nlele dị mfe n'ihi na ọdịdị conical na-ebelata ebe elu n'ime vial ahụ. A na-enye ụdị ntinye conical niile nwere ebe a dọtara nke ọma yana ebe mandrel emelitere.