Thepa e sebetsa molemong oa tlhahlobo ea pele ea sampole e lokelang ho lekoa, bakeng sa ho nolofatsa ts'ebeliso ea li-in vitro diagnostic reagents kapa lisebelisoa ho leka mohlahlobi.Sehlahisoa se phunyeletsoa ka katleho tlas'a mahloriso a ion ea letsoai le maemo a pH, 'me tlas'a ts'ebetso ea li-ionic surfactants, protheine e ntšoa 'me nucleic acid e lokolloa.