Amakuru - Nubuhe buryo bwibanze bwo gupima ogisijeni yashonze mumazi?

Umwuka wa ogisijeni (DO) ushonga ni ikintu gikomeye mu gusuzuma ubushobozi bwo kwisukura bw’ibidukikije byo mu mazi no gusuzuma ubwiza bw’amazi muri rusange. Ubwinshi bwa ogisijeni yashonze bigira uruhare runini muburyo bwo gukwirakwiza no gukwirakwiza ibinyabuzima byo mu mazi. Ku moko menshi y’amafi, urwego rwa DO rugomba kurenza mg / L kugirango rushyigikire imikorere isanzwe yumubiri. Kubwibyo, umwuka wa ogisijeni ushonga nikimenyetso cyingenzi mubikorwa bisanzwegahunda yo gukurikirana ubuziranenge bw'amazi.Uburyo bwibanze bwo gupima ogisijeni yashonze mumazi harimo uburyo bwa iyode, uburyo bwa electrochemic probe, uburyo bwo gutwara ibintu, nuburyo bwa fluorescence. Muri ibyo, uburyo bwa iyode ni bwo buryo bwa mbere busanzwe bwateguwe mu gupima DO kandi bugakomeza kuba inzira (igipimo). Nyamara, ubu buryo bushobora kwibasirwa cyane no kugabanya ibintu nka nitrite, sulfide, thiourea, aside humic, na aside tannic. Mu bihe nk'ibi, uburyo bwa electrochemic probe uburyo burasabwa kubera ubwinshi bwabwo, kutivanga kwinshi, imikorere ihamye, hamwe nubushobozi bwo gupima byihuse, bigatuma bikoreshwa cyane mubikorwa bifatika.

Uburyo bwa electrochemic probe uburyo bukora ku ihame ry'uko molekile ya ogisijeni ikwirakwira binyuze mu cyuma cyatoranijwe kandi ikagabanuka kuri electrode ikora, ikabyara ikwirakwizwa rya ogisijeni. Mugupima ubu buryo, umwuka wa ogisijeni ushonga murugero urashobora kugenwa neza. Uru rupapuro rwibanze ku buryo bukoreshwa nuburyo bwo kubungabunga bujyanye nuburyo bwa electrochemic probe uburyo, bugamije kunoza gusobanukirwa imikorere yimikorere yibikoresho no kunoza neza ibipimo.

1.Ibikoresho na reagent
Ibikoresho byibanze: isesengura ryiza ryamazi menshi
Reagents: ibikenewe kugirango hamenyekane iyode ya ogisijeni yashonze

2. Calibibasi yuzuye ya Calibrasi ya Oxygene ya metero ya elegitoronike
Uburyo bwa Laboratoire 1 (Uburyo bwuzuye bwo mu kirere-Amazi): Ku cyumba cy'ubushyuhe bugenzurwa na 20 ° C, shyira 1 L y'amazi ya ultrapure muri 2 L. Hindura igisubizo ubudahwema amasaha 2, hanyuma uhagarike umwuka hanyuma wemerere amazi guhagarara muminota 30. Tangira kalibrasi ushyira probe mumazi hanyuma ukayungurura hamwe na magnetiki stirrer kuri 500 rpm cyangwa ukagenda buhoro buhoro electrode mugice cyamazi. Hitamo “kalibrasi yuzuye-amazi ya kalibrasi” kumurongo wibikoresho. Iyo urangije, gusoma byuzuye bigomba kwerekana 100%.

Uburyo bwa Laboratoire 2 (Uburyo bwo mu kirere bwuzuye-Amazi): Kuri 20 ° C, oza sponge imbere yintoki zirinda iperereza kugeza zuzuye. Witonze uhanagure hejuru ya membrane ya electrode hamwe nimpapuro zo kuyungurura kugirango ukureho ubuhehere burenze, ongera ushyire electrode mumaboko, hanyuma ubemerera kuringaniza amasaha 2 mbere yo gutangira kalibrasi. Hitamo “kalibrasi yuzuye amazi” muburyo bwibikoresho. Iyo urangije, gusoma-byuzuye mubisanzwe bigera kuri 102.3%. Mubisanzwe, ibisubizo byabonetse hakoreshejwe uburyo bwuzuye bwamazi bwuzuye bwamazi bihuye nibyavuye muburyo bwuzuye bwamazi. Ibipimo byakurikiyeho byombi bitanga umusaruro hafi 9.0 mg / L.

Guhindura umurima: Igikoresho kigomba guhindurwa mbere yo gukoreshwa. Urebye ko ubushyuhe bwo hanze bwibidukikije akenshi butandukana na 20 ° C, kalibrasi yumurima ikorwa neza hakoreshejwe uburyo bwuzuye bwamazi bwuzuye mumazi murwego rwa probe. Ibikoresho byahinduwe ukoresheje ubu buryo byerekana amakosa yo gupima mubipimo byemewe kandi bigakomeza kuba byiza murwego rwo gusaba.

3. Guhindura Zeru-Ingingo
Tegura igisubizo kitarimo ogisijeni ushonga 0,25 g ya sodium sulfite (Na₂SO₃) na 0,25 g ya cobalt (II) chloride hexahydrate (CoCl₂ · 6H₂O) muri 250 mL y'amazi ya ultrapure. Shira iperereza muri iki gisubizo hanyuma witonze witonze. Tangiza zero-point ya kalibrasi hanyuma utegereze ko gusoma bihagarara mbere yo kwemeza ko birangiye. Ibikoresho bifite indishyi zeru zidasanzwe ntibisaba intoki zeru.

Andika ubutumwa bwawe hano hanyuma utwohereze

Igihe cyo kohereza: Ukuboza-09-2025