Ukuhlolwa kwe-COD kuyinkomba engcono kakhulu yokungcola kwemvelo emanzini angcolile ezimbonini aqukethe ama-cyanide nezinsimbi ezisindayo. Ukuhlolwa kwe-COD kunikeza impendulo esheshayo ezimeni ezishintshayo ngaphambi kokuba kuthuthuke izinkinga ezibucayi. 

Kulokhu kuhlolwa kusetshenziswa i-reagent engenalutho esikhundleni sendawo evamile engenalutho yamanzi okukhulunywe ngayo emiyalweni evamile yokusebenza kwe-photometer. I-reagent blank ilungiswa ngokungeza amanzi akhishwe i-deionised noma a-distilled kushubhu le-reagent bese kugaywa ishubhu ngendlela efanayo neyesampula yamanzi.
Akudingekile ukulungisa i-reagent engenalutho njalo lapho ukuhlolwa kwenziwa. Ishubhu elingenalutho le-reagent lingase lilungiswe masonto onke futhi lisetshenziswe ngokuphindaphindiwe nawo wonke amasampuli alungiselelwe kusukela kuqeqebana lamashubhu asebenzayo. I-reagent engenalutho kufanele igcinwe ebumnyameni phakathi kokusetshenziswa.

Isidingo somoya-mpilo wamakhemikhali siwukuhlola okubalulekile kokuhlola ikhwalithi yamanzi alahlwayo kanye namanzi angcolile ngaphambi kokuba akhishwe. Ukuhlolwa kweChemical Oxygen Demand (COD) kubikezela isidingo somoya-mpilo kumfucumfucu futhi isetshenziselwa ukuqapha nokulawula okuphumayo, kanye nokuhlola ukusebenza kwezitshalo zokwelashwa. Umthelela wokuchitheka kwamanzi angcolile noma angcolile emanzini atholwayo ubikezelwa ngesidingo sawo somoya-mpilo. Lokhu kungenxa yokuthi ukukhishwa komoya-mpilo emanzini emvelo kunciphisa amandla awo okulondoloza impilo yasemanzini. Ngakho-ke ukuhlolwa kwe-COD kwenziwa njengenjwayelo kumalabhorethri ezinsiza zamanzi nezinkampani zezimboni.

Ngokuhlolwa kweshubhu ye-Aijiren COD, umsebenzisi ngamunye angakwazi ukuthola kalula amanzi azwela kakhulu futhi anembile.
Isikhathi esidingekayo senqubo yokulinganisa sifinyezwa kakhulu, ikakhulukazi ekuhlaziyweni okujwayelekile kanye nesilinganiso sochungechunge, kuyilapho kunciphisa kakhulu umsebenzi.
Ishubhu yokuhlola ye-COD iqukethe umthamo oqondile we-reagent. Ngakho-ke, inani lamakhemikhali eleqile liyagwenywa futhi nokuphepha komsebenzi kuyathuthukiswa.

Imininingwane Yokuhlolwa Kwesidingo Se-Chemical Oxygen:

U-2mL wesampula wamanzi noma we-watse wengezwa eshubhuni yengilazi engu-16mm equkethe into evuselela ukugaya ukudla kanye ne-catalyst. Ishubhu imbozwe nge-polypropylene, ikepisi elayishiwe ye-PTFE futhi ishisiswe ku-block digester ku-150C amahora angu-2. I-chromium ye-Hexavalent ewolintshi yehliswa ibe yi-chromium e-trivalent eluhlaza okwesibhakabhaka. Ibanga lokuhlaziya lendlela ye-spectrophotometric ngu-5-150ppm (kukalwa ku-420nm).

Ama-COD Tubetests asetshenzisiwe aqukethe i-sulfuric acid eqinile namanye amakhemikhali, ngakho-ke ama-reagents kufanele aphathwe ngokucophelela. Okuqukethwe kwepayipi kufanele kulahlwe ngokuhambisana nezidingo zeziphathimandla zendawo.
Lawa mashubhu okuhlola aqinisekisiwe nge-SGC. Lawa mashubhu angasetshenziswa kanye kuphela, ngakho awakwazi ukuphinda asetshenziswe.

Ukuze usebenzise i-heater yedijithali ekuhloleni i-COD, setha izinga lokushisa kusibonisi esidijithali libe ngu-150°C. Akumele i-heater ibekwe ezingeni lokushisa eliphezulu kunalelo elishiwo njengoba lokhu kungase kubangele ingozi ngokwakhiwa komfutho kumashubhu e-COD.

Ifanele ama-colorimeters namakhithi okuhlola emakethe
Futhi ifanele izinsimbi zomculo namakhithi okuhlola
Izitsha ezivalwe kalula ezivuleke kalula zisusa ubungozi bokungcoliseka
Nweba isikhathi seshelufu sibe yiminyaka emihlanu
Asetshenziselwa ukuhlola amanzi angcolile kamasipala; ukuhlolwa kwamanzi angcolile ezimbonini kanye nokulawula inqubo; ukuhlolwa kwamanzi kwemvelo

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
Isicelo
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
Ibhodlela le-Reagent
Hlanza ngaphandle kweshubhu lokuhlola futhi ulinganise.
Lungisa i-photometer ibe yiziro ngokusebenzisa inani elingenalutho elithi "NULL"

Isidingo somoya-mpilo wamakhemikhali siwukuhlola okubalulekile kokuhlola ikhwalithi yamanzi alahlwayo kanye namanzi angcolile ngaphambi kokuba akhishwe. Ukuhlolwa kweChemical Oxygen Demand (COD) kubikezela isidingo somoya-mpilo kumfucumfucu futhi isetshenziselwa ukuqapha nokulawula okuphumayo, kanye nokuhlola ukusebenza kwezitshalo zokwelashwa. Umthelela wokuchitheka kwamanzi angcolile noma angcolile emanzini atholwayo ubikezelwa ngesidingo sawo somoya-mpilo. Lokhu kungenxa yokuthi ukukhishwa komoya-mpilo emanzini emvelo kunciphisa amandla awo okulondoloza impilo yasemanzini. Ngakho-ke ukuhlolwa kwe-COD kwenziwa njengenjwayelo kumalabhorethri ezinsiza zamanzi nezinkampani zezimboni.

Ngokuhlolwa kweshubhu ye-Aijiren COD, umsebenzisi ngamunye angakwazi ukuthola kalula amanzi azwela kakhulu futhi anembile.
Isikhathi esidingekayo senqubo yokulinganisa sifinyezwa kakhulu, ikakhulukazi ekuhlaziyweni okujwayelekile kanye nesilinganiso sochungechunge, kuyilapho kunciphisa kakhulu umsebenzi.
Ishubhu yokuhlola ye-COD iqukethe umthamo oqondile we-reagent. Ngakho-ke, inani lamakhemikhali eleqile liyagwenywa futhi nokuphepha komsebenzi kuyathuthukiswa.

Ukuhlolwa kwe-Chemical Oxygen Demand (COD) kusetshenziswa kabanzi njengesilinganiso sokungcoliswa kwezinto eziphilayo ngokunquma inani le-oxygen edingekayo ukuze kufakwe i-oxidation yezinhlobo ezincishisiwe ezihlanganisa izinto eziphilayo, kusampula yamanzi kusetshenziswa i-oxidizing ejenti ethile, izinga lokushisa kanye nokunciphisa isikhathi. Ukuhlolwa kwe-COD kuyinkomba engcono kakhulu yokungcola kwemvelo emanzini angcolile ezimbonini aqukethe ama-cyanide nezinsimbi ezisindayo. Ukuhlolwa kwe-COD kunikeza impendulo esheshayo ezimeni ezishintshayo ngaphambi kokuba kuthuthuke izinkinga ezibucayi. Izitsha ze-COD zika-Lovibond ziyahambisana nama-colorimeter OKUMBILI we-Lovibond ne-Hach®.