Vhura COD test chubhu, ibate pakona uye wowedzera zvishoma nezvishoma
2.0 mL ye pretreated sampuli mhinduro kubva kune reaction chubhu pasina kusanganisa kuitira kuti maviri akaparadzana akaturikidzana
zvinoumbwa.
Kavha kepu yakachengeteka kuti uedze chubhu, bata chubhu nekavha, isa chubhu mubhodhoro rekuchengetedza uye zunza
(Kuchenjerera, test tube inopisa). Isa chubhu mumudziyo wekudziya. Tanga kudziyisa purogiramu.
Mushure memaawa maviri bvisa test tube kubva pakupisa block, bvumira kutonhora kusvika kukamuri tembiricha uye zunza zvinyoro
kakawanda.
Chenesa kunze kwechubhu yebvunzo uye kuyera.
Gadzirisa photometer kusvika zero nekushandisa isina chinhu kukosha "NULL"