Njira ya kuyeza kwa oxygen kufuna (COD), kaya ndi njira ya reflux, njira yofulumira kapena njira ya photometric, imagwiritsa ntchito potassium dichromate monga oxidant, silver sulfate monga chothandizira, ndi mercury sulfate monga masking agent a chloride ions. Pansi acidic zinthu sulfuric asidi Kutsimikiza kwa COD Kutsimikiza njira zochokera chimbudzi dongosolo. Pazifukwa izi, anthu achita ntchito zambiri zofufuzira pofuna kupulumutsa ma reagents, kuchepetsa kugwiritsa ntchito mphamvu, kupanga ntchitoyo kukhala yosavuta, yachangu, yolondola komanso yodalirika. Njira yofulumira ya chimbudzi cha spectrophotometric imaphatikiza ubwino wa njira zomwe zili pamwambazi. Zimatanthawuza kugwiritsa ntchito chubu losindikizidwa ngati chubu chogayitsa, kutenga madzi pang'ono ndi ma reagents mu chubu losindikizidwa, kuwayika mu kanyumba kakang'ono kosasintha kutentha, kutenthetsa kutentha kosalekeza kwa chimbudzi, ndi kugwiritsa ntchito spectrophotometer Mtengo wa COD ndi. kutsimikiziridwa ndi photometry; Mafotokozedwe a chubu losindikizidwa ndi φ16mm, kutalika kwake ndi 100mm ~ 150mm, kutsegula ndi makulidwe a khoma la 1.0mm ~ 1.2mm ndi pakamwa mozungulira, ndipo chivundikiro chosindikizira chozungulira chikuwonjezeredwa. Chubu losindikizidwa limakhala ndi kukana kwa asidi, kukana kutentha kwambiri, kukana kukakamiza komanso anti-kuphulika. Chubu chomata chingagwiritsidwe ntchito pogaya chakudya, chotchedwa chubu chogaya chakudya. Mtundu wina wa chubu losindikizidwa lingagwiritsidwe ntchito pogaya chakudya komanso lingagwiritsidwe ntchito ngati chubu cha colorimetric cha colorimetry, chomwe chimatchedwa digestion colorimetric chubu. Chimbudzi chaching'ono chotenthetsera chimagwiritsa ntchito chipika cha aluminiyamu ngati chotenthetsera, ndipo mabowo otenthetsera amagawidwa mofanana. Bowo la dzenje ndi φ16.1mm, kuya kwa dzenje ndi 50mm ~ 100mm, ndipo kutentha komwe kumayikidwa ndi kutentha kwa chimbudzi. Panthawi imodzimodziyo, chifukwa cha kukula koyenera kwa chubu losindikizidwa, chimbudzi chamadzimadzi chimakhala ndi gawo loyenera la malo mu chubu losindikizidwa. Gawo la chubu lachimbudzi lomwe lili ndi ma reagents limalowetsedwa mu dzenje lotentha la chotenthetsera, ndipo pansi pa chubu chosindikizidwa chimatenthedwa ndi kutentha kosalekeza kwa 165 ° C; gawo lapamwamba la chubu losindikizidwa ndilopamwamba kuposa dzenje lotenthetsera ndipo limakhala ndi malo, ndipo pamwamba pa pakamwa pa chubu amatsitsidwa pafupifupi 85 ° C pansi pa kuzizira kwachilengedwe kwa mpweya; Kusiyana kwa kutentha kumatsimikizira kuti zomwe madzi amadzimadzi mu chubu laling'ono losindikizidwa ali mu kutentha pang'ono reflux boma pa kutentha kosalekeza. The yaying'ono COD reactor imatha kukhala ndi machubu 15-30 osindikizidwa. Mukatha kugwiritsa ntchito chubu chosindikizidwa kuti chigayidwe chigayidwe, kuyeza komaliza kutha kuchitidwa pa photometer pogwiritsa ntchito chubu cha cuvette kapena colorimetric. Zitsanzo zokhala ndi COD za 100 mg/L mpaka 1000 mg/L zimatha kuyezedwa pamlingo wa 600 nm, ndipo zitsanzo zokhala ndi mtengo wa COD wa 15 mg/L mpaka 250 mg/L zitha kuyezedwa pamlingo wa 440 nm. Njirayi ili ndi mawonekedwe a malo ang'onoang'ono, kugwiritsa ntchito mphamvu zochepa, kugwiritsira ntchito reagent yaying'ono, kuchepetsedwa kwamadzi otayirira, kugwiritsa ntchito mphamvu zochepa, ntchito yosavuta, yotetezeka komanso yokhazikika, yolondola komanso yodalirika, komanso yoyenera kutsimikiza kwakukulu, ndi zina zambiri. kwa zofooka za tingachipeze powerenga muyezo njira.
Lianhua COD precast reagent vials ntchito njira:
1. Tengani Mbale zingapo za COD precast reagent (zosiyanasiyana 0-150mg / L, kapena 20-1500mg / L, kapena 200-15000mg / L) ndi kuziyika pazitsulo zoyesa chubu.
2. Tengani 2ml yamadzi osungunuka ndikuyika mu chubu cha reagent No. Tengani 2ml ya chitsanzo kuti ayesedwe mu reagent chubu china.
3. Limbani kapu, gwedezani kapena gwiritsani ntchito chosakaniza kuti musakanize yankho bwinobwino.
4. Ikani chubu choyesera mu digester ndikugaya pa 165 ° kwa mphindi 20.
5. Nthawi ikatha, chotsani chubu choyesera ndikuchisiya kwa mphindi ziwiri.
6. Ikani chubu choyesera m'madzi ozizira. Mphindi 2, ozizira mpaka kutentha.
7. Pukuta khoma lakunja la chubu choyesera, ikani chubu No. 0 mu COD photometer, dinani batani la "Blank", ndipo chinsalu chidzawonetsa 0.000mg / L.
8. Ikani machubu ena oyesera motsatizana ndikusindikiza batani la "TEST". Mtengo wa COD uwonetsedwa pazenera. Mutha kukanikiza batani losindikiza kuti musindikize zotsatira.
Nthawi yotumiza: May-11-2024
