Yiziphi Izindlela Eziyinhloko Zokulinganisa I-Oxygen Encibilikisiwe Emanzini?

Indlela ye-electrochemical probe isebenza ngesimiso sokuthi ama-molecule e-oxygen asakazeke nge-membrane ekhethiwe futhi ancishiswe ku-electrode esebenzayo, okudala ugesi wokusabalalisa ohambisana nokuhlushwa kwe-oxygen. Ngokulinganisa lo mshini, ukuhlushwa kwe-oxygen encibilikisiwe kusampula kunganqunywa ngokunembile. Leli phepha ligxile ezinqubweni zokusebenza kanye nemikhuba yokulungisa ehlotshaniswa nendlela ye-electrochemical probe, ehlose ukuthuthukisa ukuqonda izici zokusebenza kwethuluzi nokuthuthukisa ukunemba kokulinganisa.

1. Izinsimbi kanye nama-Reagent
Amathuluzi ayinhloko: i-analyzer yekhwalithi yamanzi esebenza ngemisebenzi eminingi
Ama-reagent: lawo adingekayo ekunqumeni i-iodometric ye-oxygen encibilikisiwe

2. Ukulinganiswa Okugcwele Kwemitha Ye-Oxygen Encibilikisiwe
Indlela Yelebhu 1 (Indlela Yomoya Ogcwele Amanzi): Emazingeni okushisa alawulwayo egumbi angama-20 °C, faka i-1 L yamanzi acwengekile kakhulu ebhodleleni elingama-2 L. Faka umoya njalo esixazululweni amahora ama-2, bese uyeka umoya bese uvumela amanzi ukuthi azinze imizuzu engama-30. Qala ukulinganisa ngokubeka i-probe emanzini bese uvuselela nge-magnetic stirrer ku-500 rpm noma uhambise i-electrode ngobumnene ngaphakathi kwesigaba samanzi. Khetha "ukulinganisa umoya ogcwele" esibonakalayo sethuluzi. Uma usuqedile, ukufundwa kwesikali esigcwele kufanele kubonise u-100%.

Indlela Yelebhu 2 (Indlela Yomoya Ogcwele Amanzi): Ku-20 °C, manzisa isiponji ngaphakathi kwesivikelo seprobe kuze kube yilapho sigcwele ngokuphelele. Cima ngokucophelela ubuso be-membrane ye-electrode ngephepha lokuhlunga ukuze ususe umswakama owedlulele, uphinde ufake i-electrode esivikweni, bese uyivumela ukuthi ilingane amahora ama-2 ngaphambi kokuqala ukulinganisa. Khetha "ukulinganisa umoya ogcwele amanzi" esibonakalayo sethuluzi. Uma sekuqediwe, ukufundwa okugcwele ngokuvamile kufinyelela ku-102.3%. Ngokuvamile, imiphumela etholwe ngendlela yomoya ogcwele amanzi iyahambisana naleyo evela endleleni yomoya ogcwele amanzi. Ukulinganisa okulandelayo kwanoma yikuphi okuphakathi kuvame ukuveza amanani acishe abe ngu-9.0 mg/L.

Ukulinganiswa Kwensimu: Ithuluzi kufanele lilinganiswe ngaphambi kokusetshenziswa ngakunye. Njengoba amazinga okushisa angaphandle avame ukwehluka kusuka ku-20 °C, ukulinganiswa kwensimu kwenziwa kangcono kusetshenziswa indlela yomoya ogcwele amanzi ngaphakathi kwesikhafu se-probe. Izinsimbi ezilinganiswe kusetshenziswa le ndlela zibonisa amaphutha okulinganisa ngaphakathi kwemingcele eyamukelekayo futhi zihlala zifanelekile ukusetshenziswa kwensimu.

3. Ukulinganisa Okungamaphuzu Angu-Zero
Lungisa ikhambi elingenawo umoya-mpilo ngokuncibilikisa u-0.25 g we-sodium sulfite (Na₂SO₃) kanye no-0.25 g we-cobalt(II) chloride hexahydrate (CoCl₂·6H₂O) ku-250 mL wamanzi ahlanzekile kakhulu. Faka i-probe kulesi sixazululo bese ushukumisa ngobumnene. Qala ukulinganisa iphuzu elingu-zero bese ulinda ukufundwa kuzinze ngaphambi kokuqinisekisa ukuqedwa. Amathuluzi afakwe isinxephezelo esingu-zero esizenzakalelayo awadingi ukulinganisa okungu-zero ngesandla.