Hana ʻia ka pāpale 9mm screw mai nā mea kiʻekiʻe, e hāʻawi ana i ka lōʻihi maikaʻi loa a me ke kūpaʻa kemika. ʻO kāna wili pololei e hiki ai ke hoʻopaʻa maʻalahi a maikaʻi hoʻi, e hōʻoia ana i ka pani paʻa pono no nā hue HPLC. ʻO ka septa, i hana ʻia me kahi mea kūikawā, hāʻawi i ka inertness maikaʻi loa a me ka hoʻohālikelike ʻana me kahi ākea o nā laʻana, e hōʻoiaʻiʻo ana i nā hopena pololei a hiki ke hana hou ʻia i ka nānā ʻana HPLC.