Kodi ubwino ndi kuipa kwa njira ya reflux titration ndi njira yofulumira yodziwira COD ndi chiyani?

Kuyesa kwamadziKuyeza kwa CODmiyezo:
GB11914-89 "Kudziwitsa kufunikira kwa okosijeni wamankhwala mumtundu wamadzi ndi njira ya dichromate"
HJ/T399-2007 "Makhalidwe Amadzi - Kudziwitsa Kufunika Kwa Chemical Oxygen - Rapid Digestion Spectrophotometry"
TS EN ISO 6060 Kudziwitsa za kufunikira kwa mpweya wa okosijeni wamadzi
Kudziwitsa za kufunikira kwa okosijeni wamadzi amadzi ndi njira ya dichromate:
Nambala yokhazikika: "GB/T11914-89"
Njira ya potaziyamu ya dichromate imagwiritsa ntchito pretreatment yopangira oxidizing madzi mumtsuko wamphamvu wa asidi ndikuwatsitsimutsa kwa maola a 2, kotero kuti zinthu zambiri za organic * zomwe zili m'madzi zimakhala ndi oxidized.
Mbali: Ili ndi ubwino wamitundu yosiyanasiyana yoyezera (5-700mg/L), kuberekana bwino, kuchotsa kusokoneza mwamphamvu, kulondola kwambiri komanso kulondola, koma nthawi yomweyo imakhala ndi nthawi yayitali ya chimbudzi ndi kuipitsa kwakukulu kwachiwiri, ndipo iyenera kukhala kuyesedwa m'magulu akuluakulu a zitsanzo. Kuchita bwino ndi kochepa ndipo kumakhala ndi malire.
zoperewera:
1. Zimatenga nthawi yochuluka, ndipo chitsanzo chilichonse chiyenera kusinthidwa kwa maola awiri;
2. Zida zobwezeretsanso zimakhala ndi malo akuluakulu ndipo zimapangitsa kuyeza kwa batch kukhala kovuta;
3. Mtengo wowunikira ndi wokwera;
4. Panthawi yoyezera, kutaya kwa madzi obwerera kumakhala kodabwitsa;
5. Poizoni mercury mchere mosavuta kuchititsa yachiwiri kuipitsa;
6. Kuchuluka kwa reagents ndi lalikulu ndipo mtengo wa consumables ndi mkulu;
7. Njira yoyesera ndi yovuta komanso yosayenera kukwezedwa
Ubwino wa madzi Kutsimikiza kwa kufunikira kwa okosijeni wamankhwala Kufulumira chimbudzi spectrophotometry:
Nambala yokhazikika: HJ/T399-2007
Njira yodziwira mwachangu COD imagwiritsidwa ntchito makamaka pakuwunika kwadzidzidzi komwe kumachokera kuipitsidwa komanso kutsimikiza kwakukulu kwa zitsanzo zamadzi onyansa. Ubwino waukulu wa njira iyi ndikuti imagwiritsa ntchito ma reagents ochepa, imapulumutsa mphamvu, imapulumutsa nthawi, ndiyosavuta komanso yachangu, ndipo imapanga zolephera za njira zowunikira zakale. Mfundoyi ndi: muzitsulo zolimba za acidic, pamaso pa chothandizira chophatikizika, madzi amadzimadzi amasungunuka pa kutentha kwa 165 ° C kwa mphindi 10. Zinthu zochepetsera m'madzi zimaphatikizidwa ndi potassium dichromate, ndipo ma chromium ion ma hexavalent amachepetsedwa kukhala ma chromium ion. Kufunika kwa okosijeni wamankhwala m'madzi ndikofanana ndi kuchuluka kwa Cr3+ komwe kumapangidwa ndikuchepetsa. Pamene COD mtengo mu chitsanzo ndi 100-1000mg/L, kuyeza absorbance trivalent chromium opangidwa ndi kuchepetsa potaziyamu dichromate pa wavelength wa 600nm ± 20nm; Mtengo wa COD ukakhala 15-250mg/L, yesani kuyamwa konse kwa ma chromium ma chromium ma chromium osachepetsedwa ndi trivalent chromium yopangidwa ndi potassium dichromate pa utali wa 440nm±20nm. Njirayi imagwiritsa ntchito o Potaziyamu hydrogen phthalate imakoka njira yokhazikika. Malinga ndi lamulo la Beer, mkati mwa magawo ena, kuyamwa kwa yankho kumakhala ndi ubale wofananira ndi mtengo wa COD wa zitsanzo zamadzi. Malinga ndi kuyamwa, ma curve calibration amagwiritsidwa ntchito kuti asinthe kukhala kufunikira kwa okosijeni wamadzi am'madzi oyezedwa.
Mbali: Njirayi ili ndi ubwino wa ntchito yosavuta, chitetezo, kukhazikika, kulondola ndi kudalirika; ili ndi liwiro losanthula mwachangu ndipo ndiyoyenera kutsimikiza kwakukulu; imatenga malo ang'onoang'ono, imagwiritsa ntchito mphamvu zochepa, imagwiritsa ntchito ma reagents ochepa, imachepetsa kutaya madzi, komanso imachepetsa zowonongeka. Kuipitsidwa kwachiwiri, ndi zina zotero, zimagwiritsidwa ntchito kwambiri poyang'anira tsiku ndi tsiku ndi zochitika zadzidzidzi, zomwe zimapanga zolakwika za njira yachikale yokhazikika, ndipo zimatha kusintha njira yakale yamagetsi yotenthetsera dziko lonse lapansi.