Ndeapi mabhenefiti uye kuipa kweiyo reflux titration nzira uye yekukurumidza nzira yekutsunga COD?

Kuongororwa kwehutano hwemvuraCOD kuongororazviyero:
GB11914-89 "Kutsunga kwemakemikari okisijeni kudiwa mumhando yemvura nenzira ye dichromate"
HJ/T399-2007 "Mvura Hunhu - Kutemerwa kweKemikari Oxygen Inodiwa - Rapid Digestion Spectrophotometry"
TS EN ISO 6060 Sarudzo yemakemikari okisijeni kudiwa kwemhando yemvura
Kutemerwa kwemvura makemikari okisijeni kudiwa ne dichromate nzira:
Nhamba yakajairwa: "GB/T11914-89"
Iyo potassium dichromate nzira inoshandisa pretreatment operation yekuzara oxidizing mvura sampuli mune yakasimba asidhi mhinduro uye refluxing iyo kwemaawa maviri, kuitira kuti yakawanda organic zvinhu * mumvura sampuli oxidized.
Zvimiro: Iine mabhenefiti ehupamhi hweyero renji (5-700mg/L), yakanaka kubereka, kupindira kwakasimba kubviswa, kurongeka kwepamusoro uye kurongeka, asi panguva imwechete ine nguva yakareba yekugaya uye kusvibiswa kukuru kwechipiri, uye inoda kuve kuyerwa muzvikamu zvakakura zvemasampuli. Kubudirira kwakaderera uye kune zvimwe zvisingakwanisi.
kukanganisa:
1. Zvinotora nguva yakawandisa, uye sampuli imwe neimwe inoda kuchinjwa kwemaawa maviri;
2. Chigadzirwa chekudzorera chinotora nzvimbo yakakura uye chinoita kuti kuyerwa kwebatch kuome;
3. Mutengo wekuongorora wakanyanya kukwirira;
4. Munguva yekuyera nzira, tsvina yemvura inodzoka inoshamisa;
5. Toxic mercury salts inogona kukonzera kusvibiswa kwechipiri nyore nyore;
6. Huwandu hwema reagents hwakakura uye mutengo wezvinodyiwa wakakwira;
7. Nzira yekuedza yakaoma uye haina kukodzera kusimudzirwa
Hunhu hwemvura Kutemerwa kwemakemikari okisijeni kudiwa Kukurumidza kugaya spectrophotometry:
Nhamba yakajairwa: HJ/T399-2007
Iyo COD yekukurumidza yekutsunga nzira inonyanya kushandiswa mukutarisisa kwekukurumidzira kwekusvibisa masosi uye kwakakura-kutemerwa kwemasampuli emvura yetsvina. Mabhenefiti akatanhamara eiyi nzira ndeyekuti inoshandisa mashoma sampuli reagents, inochengetedza simba, inochengetedza nguva, iri nyore uye nekukurumidza, uye inogadzirisa kukanganisa kweyemhando yekuongorora nzira. Nheyo yacho ndeyokuti: mune yakasimba acidic medium, muhupo hwechigadziriso chinosanganiswa, sampu yemvura inogayiwa pakushambidzika kwe165 ° C kwemaminitsi gumi. Zvinhu zvinodzikisa zviri mumvura zvinoiswa oxidized ne potassium dichromate, uye hexavalent chromium ions inoderedzwa kuita trivalent chromium ions. Iyo kemikari yeokisijeni inodiwa mumvura inoenzanirana neiyo Cr3 + inogadzirwa nekuderedza. Kana kukosha kweCOD mumucherechedzo kuri 100-1000mg/L, pima kunyura kwetrivalent chromium inogadzirwa nekudzikiswa kwe potassium dichromate pawavelength ye600nm±20nm; Kana kukosha kweCOD kuri 15-250mg/L, pima kunyura kwemaioni maviri echromium asina kudzikiswa hexavalent chromium uye kuderedzwa trivalent chromium inogadzirwa ne potassium dichromate pawavelength ye440nm±20nm. Iyi nzira inoshandisa o Potassium hydrogen phthalate inodhirowa mwero wecurve. Zvinoenderana nemutemo weBeer, mukati meimwe nzvimbo yekutarisa, kunyura kwemhinduro kune hukama hwemutsara neCOD kukosha kwesampu yemvura. Zvinoenderana nekunyura, iyo calibration curve inoshandiswa kuishandura kuita kemikari okisijeni inodiwa yeiyo yakayerwa mvura sampu.
Zvimiro: Iyi nzira ine zvakanakira zvekushanda nyore, kuchengeteka, kugadzikana, kunyatsoita uye kuvimbika; ine kukurumidza kuongorora nekukurumidza uye inokodzera hukuru-hukuru kutsunga; inotora nzvimbo diki, inoshandisa simba shoma, inoshandisa zvidiki zve reagents, inoderedza tsvina yemvura, uye inoderedza marara echipiri. Sekondari kusvibiswa, nezvimwewo, inoshandiswa zvakanyanya mukutarisa kwezuva nezuva uye nekukurumidzira, kugadzira kukanganisa kweiyo classic standard nzira, uye inogona kutsiva yekare choto chemagetsi kupisa yenyika standard reflow nzira.