I-Chemical oxygen demand (COD) ibhekisela ekuhlanganiseni kwenqwaba komoyampilo osetshenziswa ama-oxidants lapho i-oxidizing izinto eziphilayo nezincishiswayo ezingaphili kumasampula amanzi anama-oxidants aqinile ngaphansi kwezimo ezithile. I-COD iphinde ibe yinkomba ebalulekile ekhombisa izinga lokungcoliswa kwamanzi ngezinto ezinciphisa imvelo nezingaphili.
I-analyzer ingasebenza ngokuzenzakalelayo nangokuqhubekayo isikhathi eside ngaphandle kokuya ngokuya ngezilungiselelo zesayithi. Asetshenziswa kakhulu emanzini angcolile aphuma ezimbonini zokungcoliswa kwendle, amanzi angcolile enqubo yezimboni, amanzi angcolile embonini yokukhuculula indle, amanzi angcolile esikhungo sikamasipala sokuhlanza indle nezinye izikhathi. Ngokuya ngobunkimbinkimbi bezimo zokuhlolwa kwesayithi, isistimu yokwelashwa kwangaphambili ehambisanayo ingakhethwa ukuze kuqinisekiswe ukuthi inqubo yokuhlola ithembekile, imiphumela yokuhlola inembile, futhi ihlangabezana ngokugcwele nezidingo zezikhathi ezihlukene.
2. Isimiso somkhiqizo:
Amasampula amanzi, isixazululo se-potassium dichromate digestion, isixazululo sesiliva sulfate (isiliva sulfate njenge-catalyst singangezwa ku-oxidize linear aliphatic compounds ngempumelelo) kanye nengxube ye-sulfuric acid egxilile eshiselwe ku-175℃. Umbala wezinhlanganisela eziphilayo kusixazululo se-dichromate ion oxidation uzoshintsha. I-analyzer ithola ukushintsha kombala bese iguqulela uguquko lube ivelu ye-COD bese ikhipha inani.Inani le-ion ye-dichromate esetshenzisiwe lilingana nenani lezinto eziphilayo ezi-oxidizable, okuyi-COD.
2. Amapharamitha wobuchwepheshe:
| Cha. | Igama | Imininingwane Yezobuchwepheshe |
| 1 | Ibanga Lohlelo | Ifanele amanzi angcolile ane-COD ebangeni elingu-10~5,000mg/L nokugxiliswa kwe-chloride ngaphansi kuka-2.5g/L Cl-. Ngokwesidingo sangempela samakhasimende, inganwetshwa emanzini angcolile ane-chloride engaphansi kuka-20g/L Cl-. |
| 2 | Izindlela Zokuhlola | I-Potassium dichromate digestion ekushiseni okuphezulu, ukuzimisela kwe-colorimetric |
| 3 | Ibanga lokulinganisa | 10~5,000mg/L |
| 4 | Umkhawulo ophansi Wokuthola | 3 |
| 5 | Isixazululo | 0.1 |
| 6 | Ukunemba | ±10% noma ±8mg/L(Thatha inani elikhulu) |
| 7 | Ukuphindaphinda | 10% noma 6mg/L(Thatha inani elikhulu) |
| 8 | I-Zero Drift | ±5mg/L |
| 9 | I-Span Drift | ±10% |
| 10 | Umjikelezo wokulinganisa | Ubuncane bemizuzu engama-20. Ngokwesampula sangempela samanzi, isikhathi sokugaya singasethwa kusuka kumaminithi angu-5 kuya kwangu-120. |
| 11 | Isikhathi samasampula | Isikhawu sesikhathi (esilungisekayo), ihora elibalulekile noma imodi yokulinganisa yokucupha ingasethwa. |
| 12 | Ukulinganisa umjikelezo | Ukulinganisa okuzenzakalelayo (izinsuku ezingu-1-99 ezilungisekayo), ngokuya ngamasampula wangempela wamanzi, ukulinganisa okwenziwa ngesandla kungasethwa. |
| 13 | Umjikelezo wesondlo | Isikhathi sokunakekela singaphezu kwenyanga eyodwa, cishe imizuzu engama-30 isikhathi ngasinye. |
| 14 | Ukusebenza komshini womuntu | Isibonisi sesikrini esithintwayo nokokufaka kweziyalezo. |
| 15 | Ukuzivikela kokuzihlola | Isimo sokusebenza siwukuzihlolela, okungavamile noma ukwehluleka kwamandla ngeke kulahlekelwe idatha. Iqeda ngokuzenzakalelayo ama-reactants ayinsalela futhi iqalisa kabusha umsebenzi ngemva kokusetha kabusha okungavamile noma ukuhluleka kwamandla. |
| 16 | Ukugcinwa kwedatha | Isitoreji sedatha esingekho ngaphansi kwesigamu sonyaka |
| 17 | Okokufaka kubonwa | Shintsha ubuningi |
| 18 | Isixhumi esibonakalayo sokukhiphayo | Okuphumayo okubili kwedijithali kwe-RS485, Okukodwa okungu-4-20mA okukhiphayo kwe-analog |
| 19 | Izimo zokusebenza | Ukusebenza endlini; izinga lokushisa 5-28 ℃; umswakama ohlobene≤90% (akukho ukujiya, awekho amazolo) |
| 20 | Ukusetshenziswa Kwempahla Yamandla | I-AC230±10%V, 50~60Hz, 5A |
| 21 | Ubukhulu | 355×400×600(mm) |
