Indlela yokulinganisa ikhemikhali yesidingo se-oxygen (COD), kungakhathaliseki ukuthi indlela ye-reflux, indlela esheshayo noma indlela ye-photometric, isebenzisa i-potassium dichromate njenge-oxidant, i-silver sulfate njenge-catalyst, kanye ne-mercury sulfate njenge-masking agent yama-ion e-chloride. Ngaphansi kwezimo ezimuncu ze-sulfuric acid Ukunqunywa kwe-COD Ukunquma indlela esekelwe ohlelweni lokugaya. Ngalesi sisekelo, abantu benze umsebenzi omningi wocwaningo ngenhloso yokonga ama-reagents, ukunciphisa ukusetshenziswa kwamandla, ukwenza umsebenzi ube lula, usheshe, unembile futhi uthembekile. Indlela ye-spectrophotometric yokugaya ngokushesha ihlanganisa izinzuzo zezindlela ezingenhla. Kubhekiselwa ekusebenziseni ishubhu elivalekile njengeshubhu lokugaya ukudla, ukuthatha isampula lamanzi elincane kanye nama-reagents eshubhuni elivalekile, kufakwe emshinini wokugaywa kwezinga lokushisa ongashintshi, ukushisisa izinga lokushisa elingaguquki lokugaya, nokusebenzisa i-spectrophotometer Inani le-COD kunqunywa nge-photometry; ukucaciswa kweshubhu elivaliwe ngu-φ16mm, ubude buyi-100mm ~ 150mm, ukuvuleka okunodonga oluyi-1.0mm ~ 1.2mm umlomo ovunguzayo, kanye nesembozo sokuvala esivunguzayo. Ishubhu elivaliwe linokumelana ne-asidi, ukumelana nokushisa okuphezulu, ukumelana nokucindezela kanye nezakhiwo zokulwa nokuqhuma. Ishubhu elivalekile lingasetshenziselwa ukugaya, elibizwa ngokuthi ishubhu lokugaya. Olunye uhlobo lweshubhu elivalekile lungasetshenziselwa ukugaya futhi lungasetshenziswa njengeshubhu le-colorimetric le-colorimetry, elibizwa ngokuthi i-digestion colorimetric tube. I-digester encane yokushisa isebenzisa ibhulokhi ye-aluminium njengomzimba wokushisa, futhi izimbobo zokushisa zisakazwa ngokulinganayo. I-diameter yembobo ingu-φ16.1mm, ukujula kwembobo kungu-50mm ~ 100mm, futhi izinga lokushisa elibekiwe liyizinga lokushisa lokusabela kokugaya. Ngesikhathi esifanayo, ngenxa yobukhulu obufanele beshubhu elivalwe uphawu, uketshezi lokusabela kokugaya luthatha ingxenye efanele yesikhala eshubhu elivalekile. Ingxenye ye-tube yokugaya equkethe ama-reagents ifakwe emgodini wokushisa we-heater, futhi phansi kwe-tube evaliwe kushiswa ekushiseni okungajwayelekile kwe-165 ° C; ingxenye engenhla yeshubhu evaliwe iphakeme kunembobo yokushisa futhi ivezwe esikhaleni, futhi phezulu komlomo wethubhu yehliselwa cishe ku-85 ° C ngaphansi kokupholisa komoya kwemvelo; Umehluko kumazinga okushisa uqinisekisa ukuthi uketshezi olusabelayo kushubhu elincane elivalwe lisesimeni esibilisa kancane se-reflux kulokhu kushisa okungaguquki. I-compact COD reactor ingathwala amashubhu avaliwe ayi-15-30. Ngemva kokusebenzisa ishubhu elivalekile lokusabela kokugaya ukudla, ukulinganisa kokugcina kungenziwa ku-photometer kusetshenziswa i-cuvette noma ishubhu le-colorimetric. Amasampula anamanani e-COD angu-100 mg/L kuya ku-1000 mg/L angalinganiswa kubude begagasi obungu-600 nm, futhi amasampula anenani le-COD elingu-15 mg/L kuya ku-250 mg/L angalinganiswa kubude begagasi obungu-440 nm. Le ndlela inezici zokusebenza kwendawo encane, ukusetshenziswa kwamandla okuphansi, ukusetshenziswa kwe-reagent encane, uketshezi oluncishisiwe oluncishisiwe, ukusetshenziswa kwamandla okuphansi, ukusebenza okulula, okuphephile nokuzinzile, okunembile nokuthembekile, futhi kulungele ukuzimisela okukhulu, njll., ngenxa yokushiyeka kwendlela evamile evamile.
Izinyathelo zokusebenza ze-Lianhua COD precast reagent vials:
1. Thatha izitsha ezimbalwa ze-COD precast reagent (ububanzi obungu-0-150mg/L, noma 20-1500mg/L, noma 200-15000mg/L) futhi uzibeke endaweni yokubeka ishubhu yokuhlola.
2. Thatha ngokunembile u-2ml wamanzi acwecwe uwafake kushubhu ye-reagent No. 0. Thatha u-2ml wesampula ukuze uhlolwe kwelinye ishubhu le-reagent.
3. Qinisekisa i-cap, unyakazise noma usebenzise i-mixer ukuxuba isisombululo kahle.
4. Faka ishubhu lokuhlola ku-digester futhi ugaye ku-165° imizuzu engu-20.
5. Uma isikhathi sesiphelile, khipha ishubhu lokuhlola bese uliyeka imizuzu emi-2.
6. Faka ishubhu lokuhlola emanzini abandayo. 2 amaminithi, epholile ekamelweni lokushisa.
7. Sula udonga olungaphandle lweshubhu yokuhlola, faka ishubhu engu-No. 0 ku-photometer ye-COD, cindezela inkinobho ethi “Akunalutho”, futhi isikrini sizobonisa u-0.000mg/L.
8. Beka amanye amashubhu okuhlola ngokulandelana bese ucindezela inkinobho ethi “TEST”. Inani le-COD lizovezwa esikrinini. Ungacindezela inkinobho yokuphrinta ukuze uphrinte imiphumela.
Isikhathi sokuthumela: May-11-2024
