Ni izihe nyungu n'ibibi byuburyo bwo kwisubiraho hamwe nuburyo bwihuse bwo kumenya COD?

Gupima ubuziranenge bw'amaziIkizamini cya CODibipimo:
GB11914-89 “Kumenya icyifuzo cya ogisijeni ikenewe mu bwiza bw’amazi hakoreshejwe uburyo bubiri”
HJ / T399-2007 “Ubwiza bw'amazi - Kumenya icyifuzo cya Oxygene ikenewe - Spectrophotometry yihuta”
ISO6060 “Kumenya ogisijeni ya chimique ikenera amazi meza”
Kumenya amazi ya ogisijeni ikenerwa hakoreshejwe uburyo bwa dichromate:
Numero isanzwe: “GB / T11914-89 ″
Uburyo bwa potasiyumu dichromate bukoresha uburyo bwo kwitegura neza okiside yuzuye urugero rwamazi mumuti wa acide ikomeye hanyuma ukayisubiramo mumasaha 2, kuburyo ibyinshi mubintu kama kama * murugero rwamazi iba oxyde.
Ibiranga: Ifite ibyiza byo gupima ubugari (5-700mg / L), kubyara neza, kuvanaho kwivanga gukomeye, gukosorwa neza kandi neza, ariko icyarimwe, ifite igihe kinini cyo gusya hamwe n’umwanda mwinshi wa kabiri, kandi igomba kuba gupimirwa mubice binini byintangarugero. Imikorere ni mike kandi ifite aho igarukira.
ibitagenda neza:
1. Bifata igihe kinini, kandi buri sample igomba guhinduka mumasaha 2;
2. Ibikoresho byo kumurika bifata umwanya munini kandi gupima ibyiciro bigoye;
3. Igiciro cyo gusesengura ni kinini;
4. Mugihe cyo gupima, imyanda y'amazi yagarutse iratangaje;
5. Umunyu wa mercure wuburozi urashobora gutera byoroshye umwanda wa kabiri;
6. Umubare wa reagent ni munini kandi igiciro cyibikoreshwa ni kinini;
7. Uburyo bwo kwipimisha buragoye kandi ntibukwiriye kuzamurwa mu ntera
Ubwiza bw'amazi Kumenya ogisijeni ya chimique ikenera byihuse igogorwa rya spekitifoto:
Numero isanzwe: HJ / T399-2007
Uburyo bwa COD bwihuse bwifashishwa mugukurikirana byihutirwa inkomoko y’umwanda no kugena urugero runini rw’amazi y’amazi. Ibyiza byingenzi byingenzi byubu buryo nuko ikoresha urugero ruto ruto, ikabika ingufu, ikabika umwanya, iroroshye kandi yihuta, kandi ikuzuza amakosa yuburyo bwisesengura bwa kera. Ihame ni: muburyo bukomeye bwa acide, imbere ya catisale ikomatanya, icyitegererezo cyamazi kijyanwa mubushyuhe burigihe bwa 165 ° C muminota 10. Kugabanya ibintu biri mumazi bihindurwamo okiside na potasiyumu dichromate, hamwe na chromium ion ya hexavalent igabanuka kugeza kuri ioni ya chromium. Imiti ya ogisijeni ikenerwa mu mazi iringaniza hamwe na Cr3 + ikorwa no kugabanuka. Iyo agaciro ka COD murugero ari 100-1000mg / L, bapima iyinjizwa rya chromium trivalent iterwa no kugabanya dichromate ya potasiyumu kumuraba wa 600nm ± 20nm; Iyo agaciro ka COD ari 15-250mg / L, bapima ubwinjiriro bwuzuye bwa chromium ion ebyiri za chromium itarize kandi igabanye chromium trivalent ikorwa na potasiyumu dichromate kumuraba wa 440nm ± 20nm. Ubu buryo bukoresha o Potasiyumu hydrogen phthalate ishushanya umurongo usanzwe. Dukurikije amategeko ya Byeri, murwego runaka rwo kwibandaho, kwinjiza igisubizo bifitanye isano n'umurongo wa COD w'icyitegererezo cy'amazi. Ukurikije iyinjizwa, umurongo wa kalibrasi ukoreshwa kugirango uhindurwe mubisabwa ogisijeni ya chimique ikenerwa nicyitegererezo cyamazi yapimwe.
Ibiranga: Ubu buryo bufite ibyiza byo gukora byoroshye, umutekano, umutekano, ubunyangamugayo no kwizerwa; ifite isesengura ryihuse kandi irakwiriye kugenwa nini; ifata umwanya muto, ikoresha ingufu nke, ikoresha reagent nkeya, igabanya imyanda, kandi igabanya imyanda ya kabiri. Umwanda wa kabiri, nibindi, bikoreshwa cyane mugukurikirana burimunsi no gutabara byihutirwa, bikosora ibitagenda neza muburyo busanzwe, kandi birashobora gusimbuza itanura ryamashanyarazi rya kera rishyushya uburyo busanzwe bwo kugarura igihugu.