I-20-60ml EPA VOIF VOIF i-Vial sisitya esikhethekileyo esilungiselelwe ukugcina nokugcinwa kohlalutyo lwezinto eziphilayo (VOA) kwilabhoratri. Inomgangatho wama-20-60ml, ukubonelela ngesithuba esaneleyo sokuqokelelwa kwesampulu kunye nokugcinwa. I-vial yenziwa kumgangatho ophezulu, oxhaphazelayo ngamachiza okuqinisekisa ukuthembeka kwesampulu ngexesha lokugcina ixesha elide.