HPLC vial inserts, kana ikashandiswa pamwe chete neautosampler vials, inobvumira kudzoreredza sampuli uye zviri nyore kubvisa sampuli nekuti iyo conical shape inodzikisira nzvimbo mukati mebhovhorosi. Ese maconical masitaera ekuisa anopihwa neyechinyakare yakadhonzwa poindi pamwe neyakagadziridzwa mandrel point.