Ukuhlela amasampula ajwayelekile kuyinto edinga ukwenziwa njalo ngesikhathi sokuhlolwa. Uma sithatha ukuhlolwa okuhlobene nokuhlola izinkomba zekhwalithi yamanzi njengesibonelo, ukuhlela amasampula ajwayelekile, ngokuqhathanisa inani elilinganisiwe nenani elibhekiselwe lesampula ejwayelekile, umuntu anganquma ukuthi iphutha lethuluzi lokuhlola lingaphakathi kobubanzi obubekiwe, kanti omunye angaqinisekisa ukuthi indlela yokulinganisa yomhloli ilungile yini. Ngakho-ke, ukuhlela amasampula ajwayelekile kubaluleke kakhulu ekuthembekeni kokuhlolwa.
Okulandelayo kuzokwethula inqubo yokucushwa kwamasampula ajwayelekile e-COD, woza uzobheka.
Isinyathelo sokuqala ukulungiselela izinto ezisetshenziswayo ezikhethekile ze-COD ze-Lianhua Technology - i-potassium hydrogen phthalate (HOOCC6H4COOK), amanzi acwecwe, i-beaker, induku yokuxuba, i-flask yevolumu engu-1000mL ngaphambi kokuyilungiselela.
Isinyathelo sesibili ukuthatha inani elincane le-potassium hydrogen phthalate (HOOCC6H4COOK) bese uyomisa ku-105℃ amahora ama-2, bese uyikhipha ngemva kokupholisa.
Isinyathelo sesithathu ukukala ngokunembile u-0.4251g we-potassium hydrogen phthalate eyomile (HOOCC6H4COOK) bese uyibeka ebhekheni, engeza amanzi amancane acwengekile, uvuselele kuze kuncibilike ngokuphelele, bese udlulisela ebhekheni elinomthamo (ibhekheni lingahlanzwa kathathu ngamanzi acwengekile, bese isixazululo sokuhlanza singezwa ebhekheni elinomthamo), bese ekugcineni sincibilika sibe ngu-1000mL.
Manje, isampula ejwayelekile ye-COD engu-500mg/L isilungile. Isampula ejwayelekile elungisiwe ingasetshenziswa ukuhlola nokulinganisa amathuluzi, futhi isikhathi sokuphila seshelufu ngokuvamile siyizinyanga ezi-3.
Okungenhla kuyindlela yokucushwa kwesampula ejwayelekile ye-COD kule nkinga. Ngilandele ukuze ufunde ulwazi olwengeziwe lokuhlola!
Isikhathi sokuthunyelwe: Mashi-31-2025
