DPD spectrophotometrie nuburyo busanzwe bwo kumenya chlorine isigara yubusa hamwe na chlorine isigaye yubusa mugihugu cyigihugu cyUbushinwa “Amazi meza y’amazi n’uburyo bwo gusesengura” GB11898-89, cyateguwe n’ishyirahamwe ry’ubuzima rusange ry’Abanyamerika, Ishyirahamwe ry’amazi muri Amerika hamwe no kurwanya umwanda w’amazi. Federasiyo. Mu gitabo cyahinduwe cyitwa “Standard Test Methods for Water and Wastewater”, uburyo bwa DPD bwakozwe kuva ku nshuro ya 15 kandi burasabwa nk'uburyo busanzwe bwo gupima dioxyde ya chlorine.
Ibyiza byuburyo bwa DPD
Irashobora gutandukanya dioxyde ya chlorine nubundi buryo butandukanye bwa chlorine (harimo chlorine isigaye yubusa, chlorine isigaye yose hamwe na chlorite, nibindi), byoroshye gukora ibizamini byamabara. Ubu buryo ntabwo busobanutse neza nka titre ya amperometric, ariko ibisubizo birahagije kubikorwa rusange.
ihame
Ukurikije pH 6.2 ~ 6.5, ClO2 yabanje kwitwara hamwe na DPD kugirango ibe ifumbire itukura, ariko amafaranga agaragara agera kuri kimwe cya gatanu cyibintu byose biboneka muri chlorine (bihwanye no kugabanya ClO2 kuri ioni ya chlorite). Niba icyitegererezo cyamazi kirimo acide imbere ya iyode, chlorite na chlorate nayo irabyitwaramo, kandi iyo itabangamiwe no kongeramo bicarbonate, ibara ryavuyemo rihuye nibintu byose bya chlorine biboneka muri ClO2. Kwivanga kwa chlorine yubusa birashobora guhagarikwa wongeyeho glycine. Icyashingiweho ni uko glycine ishobora guhita ihindura chlorine yubusa muri aside ya chlorine aminoacetic, ariko nta ngaruka igira kuri ClO2.
Potasiyumu iyode yumuti usanzwe, 1.006g / L: Gupima 1.003g iyode ya potasiyumu (KIO3, yumishijwe kuri 120 ~ 140 ° C mumasaha 2), gushonga mumazi meza cyane, hanyuma ikohereza mubunini bwa 1000ml.
Koresha flask yo gupima kurikimenyetso hanyuma uvange.
Potasiyumu iyode yumuti usanzwe, 10.06mg / L: Fata 10.0ml yumuti wibigega (4.1) mumashanyarazi ya 1000ml ya volumetric, ongeramo nka 1g ya iyode ya potasiyumu (4.5), ongeramo amazi kugirango ushiremo ikimenyetso, hanyuma uvange. Witegure kumunsi wo gukoresha mumacupa yumukara. 1.00ml yiki gisubizo gisanzwe kirimo 10.06μg KIO3, bihwanye na 1.00mg / L iboneka ya chlorine.
Buffer ya fosifate: Kuramo 24g anhydrous disodium hydrogen fosifate na 46g anhydrous potassium dihydrogen fosifate mumazi yatoboye, hanyuma ukavanga muri 100ml y'amazi yatoboye hamwe na 800mg EDTA disodium yumunyu ushonga. Koresha amazi yatoboye kuri 1L, uhitemo kongeramo 20mg ya chloride ya mercure cyangwa ibitonyanga 2 bya toluene kugirango wirinde gukura. Ongeramo mg 20 za chloride ya mercure irashobora gukuraho intambamyi zingana na iyode ishobora kuguma mugihe upimye chlorine yubusa. (Icyitonderwa: Choride ya Mercure ni uburozi, ikore neza kandi wirinde kuribwa)
N, N-diethyl-p-phenylenediamine (DPD) Icyerekezo: Kuraho 1.5g DPD sulfate pentahydrate cyangwa 1.1g anhydrous DPD sulfate mumazi ya chlorine idafite amazi arimo 8ml1 + 3 acide sulfurike na 200mg EDTA disodium umunyu, ubike kugeza kuri litiro 1, ububiko mu icupa ryikirahure cyubururu, hanyuma ubike ahantu hijimye. Iyo ibipimo bishize, bigomba gusubirwamo. Buri gihe ugenzure agaciro ko kwinjiza ingero zuzuye,
Niba agaciro ko kwinjiza ubusa kuri 515nm karenze 0.002 / cm, kwiyubaka bigomba gutereranwa.
Iyode ya Potasiyumu (KI kristu)
Sodium arsenite igisubizo: Kuramo 5.0g NaAsO2 mumazi yatoboye hanyuma ukayungurura litiro 1. Icyitonderwa: NaAsO2 ni uburozi, irinde kuribwa!
Umuti wa Thioacetamide: Kuramo mg 125 za thioacetamide muri ml 100 y'amazi yatoboye.
Umuti wa glycine: Kuramo glycine 20g mumazi adafite chlorine hanyuma ukayungurura 100ml. Ububiko bwakonje. Ukeneye gusubirwamo mugihe habaye akajagari.
Umuti wa acide sulfure (hafi 1mol / L): Kuramo 5.4ml yibanze H2SO4 mumazi 100ml yatoboye.
Sodium hydroxide yumuti (hafi 2mol / L): Gupima 8g NaOH hanyuma uyishongeshe mumazi 100ml.
Calibration (ikora) umurongo
Kurukurikirane rwimiyoboro 50 yamabara, ongeramo 0.0, 0.25, 0.50, 1.50, 2.50, 3.75, 5.00, 10.00ml yumuti wa potasiyumu iyode isanzwe, ongeraho nka 1g ya iyode ya potasiyumu na 0.5ml yumuti wa acide sulfurike, vanga hanyuma ureke uhagarare muminota 2, hanyuma ongeramo 0.5ml sodium hydroxide yumuti hanyuma uyunguruze. Ibiterwa muri buri gacupa bihwanye na 0.00, 0.05, 0.10, 0.30, 0.50, 0,75, 1.00, na 2.00 mg / L ya chlorine iboneka. Ongeramo 2,5ml ya fosiferi na 2,5ml yumuti wibipimo bya DPD, vanga neza, hanyuma uhite (muminota 2) upima kwinjiza kuri 515nm ukoresheje cuvette ya santimetero 1. Shushanya umurongo usanzwe hanyuma ushake kugereranya.
Intambwe zo Kumenya
Dioxyde ya Chlorine: Ongeramo 1ml yumuti wa glycine kuri 50ml yicyitegererezo cyamazi hanyuma uvange, hanyuma ushyiremo 2,5ml ya fosiferi na 2.5ml yumuti wa DPD, uvange neza, hanyuma upime ibyinjira ako kanya (muminota 2) (gusoma ni G).
Dioxyde ya Chlorine na chlorine iboneka kubuntu: Fata urundi rugero rwamazi ya 50ml, ongeramo 2,5ml ya fosifate na 2.5ml igisubizo cyerekana DPD, vanga neza, hanyuma upime ibyinjira ako kanya (muminota 2) (gusoma ni A).
7,3 Iminota 2) (Gusoma ni C).
Chlorine yose iboneka harimo dioxyde ya chlorine yubusa, chlorite, chlorine isigaye yubusa hamwe na chlorine isigaranye: Nyuma yo kubona gusoma C, ongeramo 0.5ml acide sulfurike yumuti wamazi mumacupa amwe, hanyuma uvange Nyuma yo guhagarara muminota 2, ongeramo 0,5 ml sodium hydroxide yumuti, vanga hanyuma upime ibyinjira ako kanya (gusoma ni D).
ClO2 = 1.9G (ubarwa nka ClO2)
Chlorine iboneka kubuntu = AG
Hamwe na chlorine iboneka = CA.
Byose biboneka chlorine = D.
Chlorite = D- (C + 4G)
Ingaruka za Manganese: Ikintu cyingenzi kibangamira amazi yo kunywa ni okiside ya manganese. Nyuma yo kongeramo buffer ya fosifate (4.3), ongeramo 0.5 ~ 1.0ml sodium arsenite yumuti (4.6), hanyuma wongereho DPD igipimo cyo gupima iyinjira. Kuramo iki gisomwa mugusoma A kugirango ukureho
Kuraho kwivanga muri oxyde ya manganese.
Ingaruka yubushyuhe: Muburyo bwose bwo gusesengura bushobora gutandukanya ClO2, chlorine yubusa hamwe na chlorine ihuriweho, harimo titre ya amperometric, uburyo bwa iodometrike ikomeza, nibindi, ubushyuhe buzagira ingaruka kumyumvire itandukanye. Iyo ubushyuhe buri hejuru, chlorine ihuriweho (chloramine) izasabwa kugira uruhare mubitekerezo mbere, bikavamo ibisubizo byinshi bya ClO2, cyane cyane chlorine yubusa. Uburyo bwa mbere bwo kugenzura ni ukugenzura ubushyuhe. Hafi ya 20 ° C, urashobora kandi kongeramo DPD kurugero rwamazi ukayivanga, hanyuma ugahita wongeramo 0.5ml thioacetamide yumuti (4.7) kugirango uhagarike chlorine isigaye (chloramine) ivuye muri DPD. Igisubizo.
Ingaruka yigihe cyamabara: Kuruhande rumwe, ibara ritukura ryakozwe na ClO2 na DPD ryerekana ntigihinduka. Ibara ryijimye, niko ryihuta. Kurundi ruhande, nkuko igisubizo cya fosifate nigipimo cya DPD kivanze mugihe, nabo ubwabo bazashira. Yibyara ibara ritukura ryibinyoma, kandi uburambe bwerekanye ko iyi-biterwa nigihe cyamabara adahinduka nimpamvu nyamukuru yo kugabanya amakuru neza. Kubwibyo, kwihutisha buri ntambwe ikora mugihe ugenzura ibipimo byigihe byakoreshejwe muri buri ntambwe ni ngombwa kugirango tunonosore neza. Ukurikije ubunararibonye: iterambere ryamabara kumurongo uri munsi ya 0.5 mg / L rirashobora guhagarara neza muminota igera kuri 10 kugeza kuri 20, iterambere ryamabara kumurongo wa mg / L rishobora guhagarara neza muminota 3 kugeza kuri 5, na iterambere ryamabara kumurongo uri hejuru ya 5.0 mg / L bizaba bihamye mugihe kitarenze umunota 1.
UwitekaLH-P3CLOubungubu yatanzwe na Lianhua ni portablemetero ya chlorine isigayeibyo byubahiriza uburyo bwa DPD bwo gufotora.
Isesengura rimaze gushiraho uburebure n'umurongo. Ukeneye gusa kongeramo reagent no gukora colorimetry kugirango ubone ibisubizo byihuse bya chlorine isigaye, chlorine isigaye yose hamwe na dioxyde ya chlorine mumazi. Ifasha kandi amashanyarazi ya batiri no gutanga amashanyarazi murugo, byoroshye gukoresha haba hanze cyangwa muri laboratoire.
Igihe cyo kohereza: Gicurasi-24-2024
