Bula tšupu ea tlhahlobo ea COD, e tšoare ka lehlakoreng ebe u eketsa butle
2.0 mL ea pretreated sampole tharollo ho tswa ho reaction tube ntle le ho kopanya e le hore mekhahlelo e 'meli e arohaneng
lia thehoa.
Sireletsa sekoahelo ka mokhoa o sireletsehileng bakeng sa tube ea teko, tšoara tube ka har'a kepisi, kenya tube ka har'a botlolo ea tšireletso ebe u sisinya
(Tlhokomeliso, tube ea teko e chesa). Kenya tube ka har'a boloko ba ho futhumatsa. Qala lenaneo la ho futhumatsa.
Ka mor'a lihora tse 2, tlosa tube ea teko sebakeng sa ho futhumatsa, lumella ho pholile ho fihlela mocheso oa kamore 'me u sisinyehe ka bonolo
makhetlo a mangata.
Hloekisa ka ntle ho tube ea teko 'me u lekanye.
Fetolela photometer ho zero ka ho sebelisa boleng bo se nang letho "NULL"