Menene Hanyoyi na Farko don auna Narkar da Oxygen a Ruwa?

Hanyar binciken electrochemical tana aiki akan ka'idar cewa kwayoyin oxygen suna yaduwa ta hanyar zaɓaɓɓen membrane kuma an rage su a cikin lantarki mai aiki, suna haifar da yaduwar halin yanzu daidai da ƙwayar oxygen. Ta hanyar auna wannan halin yanzu, narkar da iskar oxygen a cikin samfurin za a iya ƙayyade daidai. Wannan takarda tana mai da hankali kan hanyoyin aiki da ayyukan kiyayewa waɗanda ke da alaƙa da hanyar binciken electrochemical, da nufin haɓaka fahimtar halayen aikin kayan aiki da haɓaka daidaiton aunawa.

1.Instruments da Reagents
Kayan aiki na farko: mai duba ingancin ruwa da yawa
Reagents: waɗanda ake buƙata don ƙaddarar iodometric na narkar da iskar oxygen

2. Cikakken Ma'auni na Narkar da Mitar Oxygen
Hanyar dakin gwaje-gwaje 1 (Tsarin Ruwan Ruwa mai Cikakkun): A yanayin zafin ɗakin da aka sarrafa na 20 ° C, sanya 1 L na ruwa mai ƙonawa a cikin 2 L beaker. Ci gaba da shayar da maganin har tsawon sa'o'i 2, sannan ku daina iska kuma ba da damar ruwa ya daidaita na minti 30. Fara daidaitawa ta hanyar sanya bincike a cikin ruwa da motsawa tare da abin motsa jiki a 500 rpm ko motsi a hankali a cikin ruwan ruwa. Zaɓi "cikakken daidaitawar ruwa-ruwa" akan mahaɗin kayan aiki. Bayan kammalawa, cikakken karatun ya kamata ya nuna 100%.

Hanyar dakin gwaje-gwaje 2 (Tsarin iska mai cike da ruwa): A 20 ° C, jiƙa soso a cikin hannun rigar binciken har sai ya cika. A hankali goge saman membrane na lantarki tare da takarda tace don cire danshi mai yawa, sake saka wutar lantarki a cikin hannun riga, sannan a ba shi damar daidaitawa na tsawon awanni 2 kafin fara daidaitawa. Zaɓi "daidaitaccen iska mai cike da ruwa" akan mahaɗin kayan aiki. Bayan kammalawa, cikakken karatun yakan kai 102.3%. Gabaɗaya, sakamakon da aka samu ta hanyar hanyar iska mai cike da ruwa ya yi daidai da waɗanda aka samo daga cikakken hanyar ruwan iska. Ma'auni na gaba na ko dai matsakaici yawanci yana haifar da ƙima a kusa da 9.0 mg/L.

Daidaita Filaye: Ya kamata a daidaita kayan aikin kafin kowane amfani. Ganin cewa yanayin zafi na waje yakan karkata daga 20 ° C, gyaran filin yana da kyau a yi amfani da hanyar iska mai cike da ruwa a cikin hannun rigar bincike. Kayan aikin da aka daidaita ta amfani da wannan hanyar suna nuna kurakuran ma'auni tsakanin iyakoki da aka yarda kuma sun kasance masu dacewa da aikace-aikacen filin.

3. Ƙimar Sifili
Shirya maganin da ba shi da iskar oxygen ta hanyar narkar da 0.25 g na sodium sulfite (Na₂SO₃) da 0.25 g na cobalt (II) chloride hexahydrate (CoCl₂ · 6H₂O) a cikin 250 ml na ruwan ultrapure. Zuba binciken a cikin wannan maganin kuma a hankali tada hankali. Fara daidaita sifili kuma jira karatun ya daidaita kafin tabbatar da kammalawa. Kayan aiki sanye take da diyya sifili ta atomatik baya buƙatar daidaita sifilin hannu.