Ndedzipi Nzira Dzekutanga Dzekuyera Okisijeni Yakanyungudutswa Mumvura?

Nzira yekuyedza electrochemical probe inoshanda papfungwa yekuti mamorekuru eokisijeni anopararira kuburikidza nemembrane yakasarudzwa uye anoderedzwa paelectrode iri kushanda, zvichigadzira simba rekupararira rinoenderana nehuwandu hweokisijeni. Nekuyera simba iri, huwandu hweokisijeni yakanyungudutswa mumuenzaniso hunogona kutsanangurwa nemazvo. Pepa iri rinotarisa pamaitiro ekushanda uye maitiro ekuchengetedza ane chekuita nenzira yekuyedza electrochemical probe, nechinangwa chekuwedzera kunzwisisa kwehunhu hwekushanda kwemidziyo uye kuvandudza kurongeka kwekuyera.

1. Zviridzwa uye Reagents
Zvishandiso zvikuru: analyzer yemhando yemvura inoshanda zvakasiyana-siyana
MaReagents: ayo anodiwa pakuongorora iodometric yeoxygen yakanyungudutswa

2. Kuongororwa Kwakazara kweMeta yeOxygen Yakanyungudutswa
Nzira yeLabhoritari 1 (Nzira yeMhepo Yakaguta): Patembiricha yemukamuri inodzorwa ye20 °C, isa 1 L yemvura yakachena kwazvo mubeaker ye2 L. Isa mhepo mumvura nguva dzose kwemaawa maviri, wobva wamisa mhepo uye rega mvura igadzikane kwemaminitsi makumi matatu. Tanga kugadzirisa nekuisa probe mumvura wokurunga ne magnetic stirrer pa500 rpm kana kufambisa electrode zvinyoro nyoro mukati mechikamu chemvura. Sarudza "saturated air-water calibration" pane instrument interface. Kana wapedza, kuverenga kwakazara kunofanirwa kuratidza 100%.

Nzira yeLabhoritari 2 (Nzira yeMhepo Yakaguta Nemvura): Pa20 °C, nyorovesa chipanji chiri mukati meruoko rwechinodzivirira cheprobe kusvika chazara. Fukidza pamusoro pe electrode membrane nepepa rekusefa kuti ubvise hunyoro hwakawandisa, dzorerazve electrode muruoko, uye rega ienzane kwemaawa maviri usati watanga kugadzirisa. Sarudza "kuongororwa kwemhepo yakaguta nemvura" pane chiratidziro chemudziyo. Kana wapedza, kuverenga kwakazara kunowanzosvika 102.3%. Kazhinji, mhedzisiro inowanikwa kuburikidza nenzira yemhepo yakaguta nemvura inoenderana neyeye nzira yemhepo yakaguta nemvura. Kuyerwa kunotevera kwechero medium kunowanzopa kukosha kunosvika 9.0 mg/L.

Kuenzanisa Munda: Chishandiso ichi chinofanira kuenzaniswa chisati chashandiswa. Zvichienderana nekuti tembiricha yekunze inowanzosiyana ne20°C, kuenzaniswa kwemunda kunonyanya kuitwa uchishandisa nzira yemhepo yakazara nemvura iri mukati mechikamu cheprobe. Zvishandiso zvakaenzaniswa uchishandisa nzira iyi zvinoratidza zvikanganiso zvekuyera mukati memiganhu inogamuchirika uye zvinoramba zvakakodzera kushandiswa mumunda.

3. Kugadzirisa Zero-Point
Gadzirira mhinduro isina okisijeni nekunyungudutsa 0.25 g ye sodium sulfite (Na₂SO₃) uye 0.25 g ye cobalt(II) chloride hexahydrate (CoCl₂·6H₂O) mu 250 mL yemvura yakachena kwazvo. Nyika probe mumushonga uyu wobva wanyandura zvinyoro nyoro. Tanga kugadzirisa zero-point uye mirira kuti kuverenga kugadzikane usati wasimbisa kupera. Zvishandiso zvakashongedzerwa ne automatic zero compensation hazvidi kugadziriswa nemaoko.