Ukumisela iisampulu ezisemgangathweni yinto ekufuneka yenziwe rhoqo ngexesha lovavanyo. Ukuthatha uvavanyo olunxulumene neempawu zokuvavanya umgangatho wamanzi njengomzekelo, ukumisela iisampulu ezisemgangathweni, ngokuthelekisa ixabiso elilinganisiweyo nexabiso lesalathiso sesampulu esemgangathweni, umntu unokugqiba ukuba impazamo yesixhobo sokuvavanya ingaphakathi koluhlu oluchaziweyo, kwaye omnye unokuqinisekisa ukuba indlela yokulinganisa yomvavanyi ichanekile na. Ke ngoko, ukumisela iisampulu ezisemgangathweni kubaluleke kakhulu ekuthembekeni kovavanyo.
Oku kulandelayo kuza kwazisa inkqubo yokumisela iisampulu ezisemgangathweni ze-COD, yiza uze kujonga.
Inyathelo lokuqala kukulungiselela izinto ezikhethekileyo zeCOD zeLianhua Technology - ipotassium hydrogen phthalate (HOOCC6H4COOK), amanzi acociweyo, ibheki, intonga yokuxuba, iflaski yevolumetric eyi-1000mL ngaphambi kokulungiselela.
Inyathelo lesibini kukuthatha i-potassium hydrogen phthalate encinci (HOOCC6H4COOK) uze uyomise kwi-105℃ kangangeeyure ezi-2, uze uyikhuphe emva kokuba ipholile.
Inyathelo lesithathu kukulinganisa ngokuchanekileyo i-0.4251g ye-potassium hydrogen phthalate eyomileyo (HOOCC6H4COOK) uze uyifake kwi-beaker, wongeze amanzi amancinci acociweyo, uvuselele ide inyibilike ngokupheleleyo, uze uyidlulisele kwi-volumetric flask (i-beaker ingahlanjwa kathathu ngamanzi acociweyo, kwaye isisombululo sokuhlamba sifakwe kwi-volumetric flask), kwaye ekugqibeleni inyibilike iye kwi-1000mL.
Ngoku, isampulu yeCOD esemgangathweni ye-500mg/L sele ilungile. Isampulu esemgangathweni elungisiweyo ingasetyenziselwa ukuvavanya nokulinganisa izixhobo, kwaye ubomi beshelufu ngokubanzi ziinyanga ezi-3.
Le ingentla yindlela yokumisela isampuli esemgangathweni ye-COD kule ngxaki. Ndilandele ukuze ufunde ulwazi oluthe kratya malunga novavanyo!
Ixesha leposi: Matshi-31-2025
