Ndedzipi Dzakakura Nzira dzekuyera Okisijeni Yakanyungudika mumvura?

Iyo electrochemical probe nzira inoshanda pamusimboti wekuti mamorekuru eokisijeni anopararira kuburikidza nemembrane inosarudza uye anodzikiswa pamagetsi ekushanda, achigadzira diffusion ikozvino yakaenzana neiyo oxygen concentration. Nekuyera iyi yazvino, iyo yakanyungudika oksijeni concentration mumuenzaniso inogona kunyatsotemwa. Iri bepa rinotarisa maitiro ekushanda uye maitiro ekugadzirisa ane chekuita ne electrochemical probe nzira, iine chinangwa chekusimudzira kunzwisisa kwemaitiro echiridzwa chekuita uye kuvandudza kuyerwa kwechiyero.

1.Instruments uye Reagents
Zviridzwa zvekutanga: multifunctional water quality analyzer
Reagents: izvo zvinodikanwa pakutemerwa kweiyo iodometric yeokisijeni yakanyungudika

2. Yakazara-Scale Calibration yeAkanyungudutswa Oxygen Meter
Murabhoritari Method 1 (Yakazara Mhepo-Mvura Nzira): Painodzorwa tembiricha yekamuri ye20 °C, isa 1 L yemvura yakanyanyisa mubeaker 2 L. Aerate mhinduro nguva dzose kwemaawa maviri, wobva wamisa aeration uye bvumira mvura kuti igadzikane kwemaminitsi makumi matatu. Tanga calibration nekuisa probe mumvura uye kubvongodza nemagnetic stirrer pa500 rpm kana kufambisa zvinyoro nyoro electrode mukati mechikamu chemvura. Sarudza "saturated air-water calibration" pane chiridzwa interface. Kana wapedza, kuverenga kwakazara kunofanirwa kuratidza 100%.

Murabhoritari Method 2 (Water-Saturated Air Method): Pa20 °C, nyorovesa siponji mukati meruoko rwekudzivirira rweprobe kusvika yazara. Nyatsodzima pamusoro pemembrane ye electrode nebepa resefa kuti ubvise mwando wakawandisa, dzorera electrode muruzha, uye wobvumira kuti ienzanise kwemaawa maviri usati watanga kugadzirisa. Sarudza "water-saturated air calibration" pane chiridzwa chekushandisa. Kana wapedza, kuverenga kwakazara kunowanzosvika 102.3%. Kazhinji, mibairo inowanikwa kuburikidza nemvura-yakazara mweya nzira inopindirana neiyo kubva kune yakazara mweya-mvura nzira. Zviyero zvinozotevera zvepakati nepakati zvinowanzoburitsa makoshero akapoteredza 9.0 mg/L.

Kuyera Munda: Chiridzwa chinofanira kuverengerwa chisati chashandiswa. Tichifunga kuti tembiricha yekunze yekunze kazhinji inosiyana kubva pa20 °C, kugadzirisa kwemumunda kunoitwa zvakanyanya uchishandisa nzira yemhepo inozadza mvura mukati meruoko rweprobe. Zviridzwa zvakayerwa uchishandisa nzira iyi zvinoratidza zvikanganiso zvekuyera mukati memiganho inogamuchirwa uye zvinoramba zvakakodzera kushandiswa kwemunda.

3. Zero-Point Calibration
Gadzirira mhinduro isina oxygen nekunyungudutsa 0.25 g ye sodium sulfite (Na₂SO₃) uye 0.25 g ye cobalt (II) chloride hexahydrate (CoCl₂ · 6H₂O) mu 250 mL yemvura yakawanda. Nyura probe mune iyi mhinduro uye zvinyoro zungudza. Tanga zero-point calibration uye mirira kuti kuverenga kugadzikane usati wasimbisa kupera. Zviridzwa zvine otomatiki zero muripo hazvidi manyore zero calibration.