Igenzura ryisesengura rya COD mugutunganya imyanda
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1. Ikintu cyingenzi-guhagararira icyitegererezo
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Kubera ko icyitegererezo cy’amazi gikurikiranwa mu gutunganya imyanda yo mu ngo kidahwanye cyane, urufunguzo rwo kubona ibisubizo nyabyo byo kugenzura COD ni uko icyitegererezo kigomba kuba gihagarariwe. Kugirango ugere kuri iki cyifuzo, ingingo zikurikira zigomba kwitonderwa.
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1.1 Kunyeganyeza icyitegererezo cyamazi neza
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Kugirango hapimwe amazi mbisi water n'amazi yatunganijwe ②, icupa ntangarugero rigomba gucomekwa neza no kunyeganyezwa neza mbere yo gutoranya kugirango ukwirakwize ibice hamwe n’ibibyimba byahagaritswe mu cyitegererezo cy’amazi bishoboka kugira ngo hashobore kuba icyitegererezo kimwe kandi gihagarariye. yabonetse. Amazi. Ku bisohoka ③ na ④ byagaragaye neza nyuma yo kuvurwa, ingero zamazi nazo zigomba kunyeganyezwa neza mbere yo gufata ingero zo gupimwa. Iyo upimye COD ku mubare munini w’amazi y’imyanda yo mu ngo, byagaragaye ko nyuma yo kunyeganyezwa bihagije, ibisubizo byo gupima urugero rw’amazi bidakunze gutandukana cyane. Irerekana ko icyitegererezo ari cyo gihagarariye.
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1.2 Fata icyitegererezo ako kanya nyuma yo kunyeganyeza icyitegererezo cyamazi
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Kubera ko umwanda urimo ubwinshi bwibintu byahagaritswe bitaringanijwe, niba icyitegererezo kidafashwe vuba nyuma yo kunyeganyega, ibimera byahagaritswe bizarohama vuba. Icyitegererezo cy’amazi, cyane cyane ibigize ibintu byahagaritswe, byabonetse ukoresheje umuyoboro wa pipette kugirango utange icyitegererezo ahantu hatandukanye hejuru, hagati no hepfo y icupa ryicyitegererezo bizaba bitandukanye cyane, bidashobora kwerekana uko ibintu byifashe mumyanda, kandi ibisubizo byapimwe ntabwo bihagarariye. . Fata icyitegererezo vuba nyuma yo kunyeganyega neza. Nubwo ibituba byabyaye bitewe no kunyeganyega (ibituba bimwe bizatandukana mugihe cyo gukuraho icyitegererezo cyamazi), urugero rwicyitegererezo ruzagira ikosa rito mumubare wuzuye bitewe nuko hari ibisigisigi bisigaye, ariko iri ni Ikosa ryisesengura ryatewe kugabanuka kwinshi ntagereranywa ugereranije nikosa ryatewe no kudahuza icyitegererezo.
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Ubushakashatsi bwakozwe bwo gupima ingero z’amazi zasigaye mu bihe bitandukanye nyuma yo kunyeganyega no gutoranya byihuse no gusesengura ako kanya nyuma yo kunyeganyeza ingero zagaragaje ko ibisubizo byapimwe n’ibyambere byatandukanije cyane n’ubuziranenge bw’amazi.
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1.3 Ingano yicyitegererezo ntigomba kuba nto cyane
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Niba umubare w'icyitegererezo ari muto cyane, uduce tumwe na tumwe dutera ogisijeni nyinshi mu mwanda, cyane cyane amazi mbisi, ntishobora kuvanwaho kubera gukwirakwizwa kutaringaniye, bityo ibisubizo bya COD byapimwe bizaba bitandukanye cyane na ogisijeni nyirizina ikenera imyanda. . Icyitegererezo kimwe cyageragejwe mubihe bimwe ukoresheje urugero rwa 2.00, 10.00, 20.00, na 50.00 mL. Byagaragaye ko ibisubizo bya COD byapimwe na 2.00 mL y'amazi meza cyangwa imyanda ya nyuma akenshi bidahuye n'ubwiza bw'amazi nyayo, kandi ubudahwema imibare y'ibarurishamibare nayo yari mibi cyane; 10.00 yarakoreshejwe, ubudahangarwa bwibisubizo byo gupima urugero rwa 20.00mL by'amazi byatejwe imbere cyane; ubudahwema bwa COD ibisubizo byo gupima 50.00mL icyitegererezo cyamazi nibyiza cyane.
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Kubwibyo, kumazi mbisi hamwe na COD nini cyane, uburyo bwo kugabanya urugero rwicyitegererezo ntigomba gukoreshwa buhumyi kugirango bujuje ibisabwa kugirango ingano ya potasiyumu dichromate yongeweho hamwe nubunini bwa titre mu gupima. Ahubwo, bigomba kwemezwa ko icyitegererezo gifite ingano ihagije kandi ihagarariwe byuzuye. Ikigamijwe ni uguhindura ingano ya potasiyumu dichromate yongeweho hamwe nubunini bwa titrant kugirango byuzuze ibisabwa by’amazi meza y’icyitegererezo, kugirango amakuru yapimwe azabe impamo.
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1.4 Hindura pipette hanyuma ukosore ikimenyetso cyibipimo
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Kubera ko ingano yubunini bwibintu byahagaritswe mubitegererezo byamazi muri rusange ari binini kurenza umurambararo wumuyoboro usohoka wa pipette, burigihe biragoye kuvanaho ibintu byahagaritswe murugero rwamazi mugihe ukoresheje umuyoboro usanzwe wohereza imyanda yo murugo. Ibipimwa muri ubu buryo ni COD gusa agaciro k'imyanda yakuyeho igice cyahagaritswe. Ku rundi ruhande, nubwo igice cy’ibintu byahagaritswe byavanyweho, kubera ko icyambu cya pipette ari gito cyane, bifata igihe kinini cyo kuzuza igipimo, hamwe n’ibisigara byahagaritswe byahungabanijwe neza mu mwanda buhoro buhoro. , kandi ibikoresho byakuweho ntibingana cyane. , icyitegererezo cyamazi kitagaragaza imiterere yubuziranenge bwamazi, ibisubizo byapimwe murubu buryo ntibizabura kugira ikosa rinini. Kubwibyo, gukoresha umuyoboro ufite umunwa mwiza kugirango ushiremo imyanda yo mu ngo yo gupima COD ntishobora gutanga ibisubizo nyabyo. Kubwibyo, mugihe cyo kuvoma amazi yimyanda yo murugo, cyane cyane icyitegererezo cyamazi gifite umubare munini wibice binini byahagaritswe, umuyoboro ugomba guhindurwa gato kugirango ubunini bwa diameter ya pore kugirango ibice byahagaritswe bishobora guhumeka vuba, hanyuma umurongo wikigereranyo ugomba kuba byakosowe. , gukora ibipimo byoroshye.
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2. Hindura ubunini nubunini bwa reagent
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Muburyo busanzwe bwo gusesengura COD, ubunini bwa dichromate ya potasiyumu muri rusange ni 0.025mol / L, amafaranga yongeweho mugihe cyo gupima icyitegererezo ni 5.00mL, naho urugero rw’imyanda ni 10.00mL. Iyo COD yibanda kumyanda myinshi, uburyo bwo gufata ingero nke cyangwa kuvoma ingero zikoreshwa muri rusange kugirango habeho imipaka yubushakashatsi bwibihe byavuzwe haruguru. Ariko, Lian Huaneng atanga reagent ya COD kuburugero rwibintu bitandukanye. Ubwinshi bwiyi reagent burahindurwa, ubwinshi nubunini bwa potasiyumu dichromate irahindurwa, kandi nyuma yubushakashatsi bwinshi, bujuje ibyangombwa bisabwa kugirango COD ibone ibyiciro byose.
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Mu ncamake, mugihe ukurikirana no gusesengura ubuziranenge bwamazi COD mumyanda yo murugo, ikintu gikomeye cyo kugenzura ni uguhagararira icyitegererezo. Niba ibi bidashobora kwemezwa, cyangwa isano iyo ari yo yose igira ingaruka ku guhagararira ubwiza bw’amazi birengagijwe, ibisubizo byo gupima no gusesengura bizaba atari byo. amakosa aganisha ku myanzuro ya tekiniki yibeshya.
ByihuseKumenya CODburyo bwakozwe na Lianhua mu 1982 burashobora kumenya ibisubizo bya COD muminota 20. Igikorwa cyoroheje kandi igikoresho kimaze gushiraho umurongo, bivanaho gukenera titre no guhinduka, bigabanya cyane amakosa yatewe nibikorwa. Ubu buryo bwayoboye udushya mu ikoranabuhanga mu rwego rwo gupima ubuziranenge bw’amazi kandi butanga umusanzu ukomeye.
Igihe cyo kohereza: Gicurasi-11-2024
