Ukuhlolwa kwe-Chemical Oxygen (COD) kuyindlela ebalulekile yokuhlola ikhwalithi yamanzi emithonjeni ehlukahlukene, kufaka phakathi imifula, amachibi, nezitshalo zokwelapha amanzi angcolile. I-COD ilinganisa inani le-oksijini elidingekayo kumakhemikhali we-oxidize we-oxidize emanzini, angakhombisa izinga lokungcoliswa kwamanje. Ukusetshenziswa okusebenzayo kwamashubhu wokuhlola ama-COD kubalulekile ukuthola imiphumela enembile nethembekile. Le bhulogi izokuqondisa ekusetshenzisweni okufanele kwamashubhu wokuhlola ama-COD ngokuhlolwa kwekhwalithi yamanzi, kufaka phakathi ukulungiselela, izinqubo, kanye nemikhuba emihle kakhulu.

Amashubhu wokuhlola amaCodamashubhu aklanywe ngokukhethekile noma amashubhu wokuhlola amapulasitiki aqukethe ama-reagents alinganiswe ngaphambi kokuhlaziywa kwe-COD. Lawa mashubhu wokuhlola asetshenziswa ngokujwayelekile nezinhlelo zokuhlaziya ama-photometric ngokwezilinganiso zokunquma amasampula wamanzi. Ukuhlolwa kususelwa ekuphendukeni kwento e-organic nge-ejenti eqinile ye-oxidizing, imvamisa i-potassium dichromate, kusisombululo se-acidic.

Uyakwazi ukusetshenziswa kwamashubhu wokuhlola ama-COD ekuhlaziyweni kwamanzi? Sicela ufunde le ndatshana: Kusetshenziswa kanjani ishubhu lokuhlola i-COD ekuhlaziyweni kwamanzi

Izici ezibalulekile zamashubhu wokuhlola i-COD

Ama-reagents alinganiswe kwangaphambili: amashubhu wokuhlola ama-COC aza nama-reacegents ahlanganiswe ngaphambili, enza lula inqubo yokulungiselela amasampula ukuze ahlaziywe.

Ukuvumelana: Lawa amashubhu enzelwe ukusetshenziswa ngama-photometers athile noma ama-colormeters, uqinisekisa izilinganiso ezinembile.

Imvelo ebekiwe

Ukulungiselela ukuhlolwa kwamakhodi

Ngaphambi kokuthi uqale inqubo yokuhlola i-COD, kufanele ulungiselele ngokuphelele. Nazi izinyathelo okufanele zilandelwe:

1. Hlanganisa imishini edingekayo

Qiniseka ukuthi unayo yonke imishini edingekayo nezinto zokwakha, kufaka phakathi:

Amashubhu wokuhlola amaCodngama-reagents alinganiswe kwangaphambili
Isampula yamanzi okufanele ihlolwe
I-Photometer noma i-Colorimeter ehambisana namashubhu wokuhlola ama-COC
I-Pipette noma isirinji sokuqoqa amasampula
Imishini yokuzivikela (i-PPE) efana namagilavu kanye nama-goggles

2. Iqoqo lesampula

Qoqa isampula yamanzi ukuze ihlaziywe nge-COD. Kubalulekile ukulandela amasu afanele wesampula ukuqinisekisa ukuthi isampula imele umthombo wamanzi. Nawa amanye amathiphu wokuqoqa amasampula:

Sebenzisa iziqukathi ezihlanzekile: qiniseka ukuthi isitsha esisetshenziselwa ukuqoqa isampula sihlanzekile futhi mahhala.

Gwema ukungcoliseka: Nakekela ukugwema ukwethula noma iyiphi inkinga yakwamanye amazwe kwisampula ngesikhathi senqubo yokuqoqa.

Hlaziya ngokushesha: Yenza ukuhlaziywa kwe-COD ngokushesha okukhulu ngemuva kokuqoqwa kwesampula. Uma ukuhlaziya kungenzeki ngokushesha, gcina isampula endaweni epholile yokunciphisa ushintsho lokuqamba.

3. Ukulondolozwa okuyisibonelo (uma kunesidingo)

Uma ungakwazi ukuhlaziya isampula yakho ngokushesha, kungadingeka ukuthi uyilondoloze. Amasampula we-COD, kuvame ukunconywa ukwehlisa i-PH kuya ku-2 noma ngaphansi ngokungeza i-Sulfuric Acid (H₂so₄) ehlanganisiwe. Lokhu kuzosiza ukuqinisa isampula futhi kunciphise umsebenzi webhayoloji kuze kwenziwe ukuhlolwa. Njalo landela imihlahlandlela yokuphepha lapho usingatha ama-acid.

Ukwenza ukuhlolwa kwe-cod

Uma usulungiselele isampula yakho futhi waqoqa imishini edingekayo, ungenza isivivinyo se-COD. Nasi umhlahlandlela wesinyathelo ngesinyathelo:

1. Lungiselela amashubhu wokuhlola ama-cod

Faka ilebuli amashubhu: Ilebuli ngokusobala ishubhu ngalinye nge-id yesampula ukugwema ukudideka ngokuhamba kwesikhathi.

Faka isampula: usebenzisa i-pipette noma isirinji, engeza isampula lamanzi ku-cod test tube. Landela imiyalo yomenzi yenani lesampula ukuze ungeze.

2. Faka ama-reagents

Ama-reagents alinganiswe kwangaphambili:Amashubhu wokuhlola amaCodwoza nama-reagents alinganiswe kwangaphambili. Qiniseka ukuthi ama-reagents aqinile futhi amashubhu avaliwe ngaphambi kokuqhubeka.

Hlanganisa kahle: Ngemuva kokungeza isampula, cap the tube ngokuqinile bese uxuba kahle ukuze uqinisekise ukuthi ama-reagents ancibilikisiwe futhi asabele ngesampula.

3. Ukushisa ishubhu lokuhlola

Isinyathelo sokushisa: Beka ishubhu lokuhlola ebhulokini lokushisa noma ekugezeni kwamanzi bese uyishisa endaweni yokushisa ebekiwe (imvamisa cishe ngo-150 ° C) ngesikhathi esinconyiwe (imvamisa amahora angu-2). Lesi sinyathelo sibucayi ukuthi ukusabela kwe-oxidation kuyenzeka.

Izindlela zokuphepha: Sebenzisa ukuqapha lapho uphatha imishini eshisayo futhi uqinisekise ukuthi ishubhu lokuhlola libekwe ngokuphephile ukuvikela ukuchitheka.

4. Ukupholisa ishubhu lokuhlola

Ngemuva kokuthi isikhathi sokushisa sesiqedile, susa ishubhu lokuhlola emthonjeni wokushisa bese ulivumela ukuba liphole ekushiseni kwegumbi. Lesi sinyathelo sibalulekile ukuvikela ukulimala ku-photometer noma i-colorimeter ngesikhathi sokuhlaziywa.

5. Ukulinganisa i-COD

Ukuhlaziywa kwe-Photometric: Lapho ishubhu lokuhlola selipholile, libeke ku-photometer noma umbala we-colormeter. Linganisa ithuluzi ngokuya ngemiyalo yomenzi bese ulinganisa ukumunca.

Ukuqopha imiphumela: Ithuluzi lizohlinzeka ngokufundwa okuhambelana nokuhlushwa kwe-cod kusampula. Qopha kahle imiphumela ukuze kuhlaziywe okunye.

Uyayazi umgomo osebenzayo weCod Vial? Sicela ufunde le ndatshana:Umgomo osebenzayo we-COD Vial

Ukugcina

Ukusetshenziswa okufanele kweAmashubhu wokuhlola amaCodUkuhlolwa kwekhwalithi yamanzi kubalulekile ekutholeni imiphumela eqondile nethembekile. Ngokulandela izinyathelo ezichazwe kule blog, kufaka phakathi ukulungiswa kwesampula, izinqubo zokuhlola, kanye nemikhuba emihle kakhulu, ungaqinisekisa ukuhlaziywa okuvumelekile kwe-Cod. Le ndlela inganikeza ukuqonda okubalulekile emazingeni okungcoliswa kwe-organic emithonjeni yamanzi, isiza ukuvikela impilo yomphakathi kanye nemvelo. Ukuqonda ukuthi usebenzise ngempumelelo ngempumelelo amashubhu wokuhlola ama-COD kungasiza ukuphatha futhi ubheke ikhwalithi yamanzi, kungaba elabhorethri noma ekuhlelweni kwensimu.

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