Kev khiav hauj lwm ntawm COD analyzer ceev ceev feem ntau ua raws li cov txheej txheem yooj yim ntawm "piv txwv npaj - digestion - ntsuas".
Tig lub analyzer thiab nws cov digester rau lub hwj chim, tso cai rau lub cuab yeej preheat rau lub xeev ruaj khov. Xaiv ib lub raj ua ntej -npaj reagent raj nrog qhov tsim nyog raws li qhov kwv yees COD concentration ntawm cov qauv dej. Ua kom raug hloov lub ntim ntim (piv txwv li, 2 mL) ntawm cov dej distilled (raws li ib qho khoob) thiab cov qauv dej los kuaj rau hauv lawv cov raj reagent, nruj lub hau, thiab co zoo. Muab cov reagent sib xyaw rau hauv lub tshuab nqus tsev preheated ntawm qhov kub thiab txias thiab pib qhov kev pab cuam digestion. Lub sij hawm digestion nyob ntawm txoj kev; Piv txwv li, tus qauv txheej txheem yuav tsum tau cua sov ntawm 148℃rau 2 teev, thaum txoj kev ceev yuav xav tau cua sov ntawm 165℃rau 15 feeb. Tom qab kev zom, tshem tawm cov reagent raj thiab cia lawv txias ib txwm los yog nrog dej rau chav tsev kub. So cov phab ntsa sab nrauv ntawm cov raj txias txias kom huv si, kom ntseeg tau tias cov tshuaj ntshiab thiab tsis muaj npuas. Muab lub raj dawb tso rau hauv lub ntsuas ntsuas ntsuas ntawm tes rau qhov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob Xaiv qhov sib thooj preset calibration nkhaus ntawm lub ntsuas; qhov ntsuas yuav ncaj qha tso saib lossis xam COD concentration tus nqi ntawm cov qauv dej.
Cov reagents siv rau kev zom zaub mov (xws li potassium dichromate thiab concentrated sulfuric acid) yog corrosive thiab lom. Cov cuab yeej tiv thaiv yuav tsum tau hnav thaum lub sijhawm ua haujlwm, thiab cov txheej txheem yuav tsum tau ua nyob rau hauv qhov chaw zoo - qhov cua. Thaum lub sij hawm zom mov, lub hau lub raj yuav tsum tau kaw kom nruj thiab lub hau npog yuav tsum tau ua kom tsis txhob ua kua dej. Digestion colorimetric raj ntawm cov cuab yeej tshwj xeeb (xws li, 16mm txoj kab uas hla) yuav tsum tau siv. High chloride ion concentrations hauv cov qauv dej tuaj yeem cuam tshuam rau kev txiav txim siab; siab -cov qauv concentration yuav tsum tau ua ntej-diluted. Tsis txhob co lub plab colorimetric raj thaum lub sij hawm tsom xam colorimetric kom tsis txhob los nag thiab sib txawv. Tsis tu ncua xyuas qhov ntsuas qhov tseeb siv cov qauv qauv. Khaws lub teeb- xa cov nplaim ntawm lub raj xim xim kom huv si thiab tsis txhob kov koj ob txhais tes ncaj qha. Qhov tshwj xeeb kev zom zaub mov, lub sijhawm, cov qauv dej ntim, thiab tus lej ntsuas qhov sib npaug yuav tsum tau ua raws li cov lus qhia thiab cov txheej txheem reagent ntawm cov qauv ntsuas siv.
