Vula ishubhu lokuhlola le-COD, libambe nge-engeli bese wengeza kancane
2.0 mL wesixazululo sesampula esenziwe ngaphambilini esivela kushubhu yokusabela ngaphandle kokuxuba ukuze izendlalelo ezimbili ezihlukene
kwakheka.
Faka isikulufu ikepisi ngokuvikelekile ukuze uhlole ishubhu, ubambe ishubhu ngekepisi, faka ishubhu ebhodleleni lokuphepha futhi unyakazise
(Qaphela, ishubhu lokuhlola liyashisa). Faka ishubhu endaweni yokushisa. Qala uhlelo lokushisisa.
Ngemva kwamahora angu-2 khipha ishubhu lokuhlola endaweni yokushisa, vumela ukuba liphole ekamelweni lokushisa futhi unyakazise kancane
izikhathi eziningana.
Hlanza ngaphandle kweshubhu lokuhlola futhi ulinganise.
Lungisa i-photometer ibe yiziro ngokusebenzisa inani elingenalutho elithi "NULL"