Maitirwo Ekuongorora Masirinji Anoraswa Pakupa Mushonga
1. Iyi nzira yekuongorora inoshanda kune majekiseni anoraswa ekupa.
Kugadzirira kwebvunzo mhinduro
a.Tora madhishi matatu zvisina tsarukano kubva kune imwechete batch yezvigadzirwa (iyo sampling vhoriyamu ichatemerwa zvinoenderana neinodiwa yekuongorora yemvura vhoriyamu uye dispenser yakatarwa), wedzera mvura kune sampuli kune yezita simba uye kuiburitsa kubva mudhiramu reutsi.Dhonza mvura mumudziyo wegirazi pa37 ℃± 1 ℃ kwe8h (kana 1h) woitonhodza kusvika kukamuri tembiricha semvura yekubvisa.
b.Chengetedza chikamu chemvura yevhoriyamu imwechete mumudziyo wegirazi senge isina chinhu yekudzora mhinduro.
1.1 Inowanikwa simbi yemukati
Isa 25ml yemhinduro yekubvisa mu25ml Nessler colorimetric chubhu, tora imwe 25ml Nessler colorimetric chubhu, wedzera 25ml yemutobvu yakajairwa mhinduro, wedzera 5ml yesodium hydroxide test solution kune maviri ari pamusoro colorimetric chubhu, wedzera madonhwe mashanu e sodium sulfide test solution zvichiteerana, uye zunza.Ngaarege kudzika kudarika chena.
1.2 pH
Tora mhinduro a uye mhinduro b yakagadzirwa pamusoro uye uyere yavo pH kukosha ne acidimeter.Musiyano uripo pakati pezviviri uchatorwa semhedzisiro yebvunzo, uye mutsauko haungapfuure 1.0.
1.3 Residual ethylene oxide
1.3.1 Kugadzirira kugadzirisa: ona Appendix I
1.3.2 Kugadzirira kwebvunzo mhinduro
Mhinduro yebvunzo ichagadzirirwa nekukurumidza mushure mesampling, zvikasadaro sampu inovharirwa mumudziyo wekuchengetera.
Cheka sampu muzvidimbu nehurefu hwe5mm, uremu 2.0g woiisa mumudziyo, woisa 10ml ye0.1mol/L hydrochloric acid, woiisa patembiricha ye1h.
1.3.3 Matanho ekuedza
① Tora 5 Nessler colorimetric machubhu uye nemazvo wedzera 2ml ye0.1mol/L hydrochloric acid zvichiteerana, wobva wawedzera nemazvo 0.5ml, 1.0ml, 1.5ml, 2.0ml, 2.5ml ethylene glycol standard solution.Tora imwe Nessler colorimetric chubhu uye nemazvo wedzera 2ml ye 0.1mol/L hydrochloric acid seyo isina chinhu kutonga.
② Wedzera 0.4ml ye0.5% periodic acid solution mune imwe neimwe yemachubhu ari pamusoro zvakateerana woisa kwe 1h.Wobva wadonhedza sodium thiosulfate mhinduro kusvika iyo yero ruvara yangonyangarika.Wobva wawedzera 0.2ml yefuchsin sulfurous acid test solution zvichiteerana, diluze kusvika 10ml nemvura yakadirwa, woiisa pakamuri tembiricha kwe1h, uye uyere kunyura pa560nm wavelength neyakashama mhinduro sereferensi.Dhirowa absorbance volume standard curve.
③ Nyatsoendesa 2.0ml yebvunzo mhinduro muNessler's colorimetric chubhu, uye shanda zvinoenderana nenhanho ②, kuitira kuti utarise hunoenderana vhoriyamu yebvunzo kubva kune yakajairwa curve ine yakayerwa kunyura.Verenga iyo yakakwana ethylene oxide yakasara maererano neinotevera fomula:
WEO=1.775V1 · c1
Ikoko: WEO -- hama yemukati ye ethylene oxide mune unit chigadzirwa, mg/kg;
V1 - inoenderana vhoriyamu yebvunzo mhinduro inowanikwa pane yakajairwa curve, ml;
C1 -- confusion ye ethylene glycol standard solution, g/L;
Huwandu hwasara hwe ethylene oxide haifaniri kudarika 10ug/g.
1.4 Easy oxides
1.4.1 Kugadzirira kugadzirisa: ona Appendix I
1.4.2 Kugadzirira kwebvunzo mhinduro
Tora 20ml yemhinduro yebvunzo yakawanikwa awa imwe chete mushure mekugadzirwa kwemushonga wekubvisa a, uye tora b seyakavharika yekudzora mhinduro.
1.4.3 Maitiro ekuedza
Tora 10ml yemushonga wekubvisa, woisa mu 250ml iodine volumetric flask, woisa 1ml ye dilute sulfuric acid (20%), nemazvo wedzera 10ml ye0.002mol/L potassium permanganate solution, kupisa uye bika kwemaminetsi matatu, kurumidza kutonhora, wedzera 0.1. g ye potassium iodide, zvakasimba plug, uye zunza zvakanaka.Pakarepo titrate ne sodium thiosulfate yakajairwa mhinduro yeiyo imwe concentration kune yakajeka yero, wedzera madonhwe mashanu e starch chiratidzo chemhinduro, uye ramba uchiita titrating ne sodium thiosulfate yakajairwa mhinduro kune isina ruvara.
Tirate iyo isina chinhu yekudzora mhinduro nenzira imwecheteyo.
1.4.4 Mhedzisiro kuverenga:
Zviri mukati mekudzikisa zvinhu (nyore oxides) zvinoratidzwa nehuwandu hwe potassium permanganate solution inopedzwa:
V=
Ikoko: V - vhoriyamu yekudyiwa potassium permanganate solution, ml;
Vs - vhoriyamu yesodium thiosulfate mhinduro inopedzwa nemubvunzo mhinduro, ml;
V0 - vhoriyamu yesodium thiosulfate mhinduro inopedzwa neisina chinhu mhinduro, ml;
Cs -- chaiyo yekusangana kwetitrated sodium thiosulfate mhinduro, mol/L;
C0 --confusion ye potassium permanganate solution inotsanangurwa muyero, mol/L.
Musiyano mukushandiswa kwe potassium permanganate solution pakati pe infusion solution ye dispenser uye isina blank control solution yebatch imwechete ye volume imwechete ichave ≤ 0.5ml.
Nguva yekutumira: Sep-26-2022
