Ụdị ngwaahịa: Nnwale vial
Ọkpụkpọ ihe eji emepụta mmiri mmiri
Atụmatụ
1. Naanị tinye ihe nlele mmiri iji gbazee ya
2. Enwere ike iji ya mee ihe ozugbo maka ụkpụrụ mmepụta colorimetric
3. Mmetụta mkpuchi dị mma, dị mfe iburu
4. Kwesịrị ekwesị maka ọrụ ubi