Masyringe otayika - Zowonjezera 1
Kukonzekera kwa ethylene oxide yotsalira njira
0.1mol/L hydrochloric acid: tsitsani 9ml hydrochloric acid mpaka 1000ml.
0.5% periodate yankho: kulemera 0,5g wa periodate ndi kuchepetsa kwa 100ml.
Sodium thiosulfate solution: yezani 1g ya sodium thiosulfate ndikuchepetsa mpaka 100ml.
10% sodium sulfite solution: kulemera 10. 0g anhydrous sodium sulfite, sungunulani ndi kusungunula ku 100ml.
Magenta sulfurous acid test solution: yezani 0.1g ya fuchsin yoyambira ndikuwonjezera 120ml ya madzi otentha kuti musungunuke.Mukaziziritsa, onjezerani 20ml wa 10% sodium sulfite solution ndi 2ml wa hydrochloric acid mumdima.Njira yothetsera mayesero iyenera kukhala yopanda mtundu.Ngati ipezeka yofiira, iyenera kukonzedwanso.
Ethylene glycol muyezo wa stock solution: tengani botolo lakunja lowuma ndi loyera la 50ml voliyumu, onjezerani pafupifupi 30ml yamadzi, yesani molondola, tengani 0.5ml ethylene glycol, yonjezerani mu botolo, gwedezani, muyese, kusiyana pakati pa zolemera ziwiri ndi kulemera kwa yankho, kuwonjezera madzi sikelo, kusakaniza izo, ndi kuwerengera ndende yake motsatira chilinganizo zotsatirazi:
C＝W/50 × chikwi chimodzi
C: Glycol muyezo wa stock solution ndende g/l;
W: Kulemera kwa ethylene glycol mu yankho g
Ethylene glycol muyezo yankho: molondola kutenga 1.0ml wa muyezo katundu solution, ndi kuchepetsa 1000ml ndi madzi.
Kukonzekera kwa reagent yosavuta oxidized:
a.Chepetsani sulfuric acid (20%): Tengani H2SO4128ml, pang'onopang'ono jekeseni 500mL, ndi kuchepetsa 1000mL pambuyo kuzirala.
b.Chizindikiro cha wowuma: tengani 0,5g wa wowuma wosungunuka, sungunulani mu 100ml yamadzi, kutentha ndi kuwiritsa, kenako muziziziritsa poyimirira (ziyenera kukonzedwa kumene zikagwiritsidwa ntchito kwakanthawi)
c.Potaziyamu permanganate yankho: tengani 3.3gKMnO4, onjezani 1050ml yamadzi, wiritsani kwa mphindi 15, onjezerani madzi ku 1050ml, muwasiye kuti aime kwa masiku opitilira awiri mutatha kusindikiza, sefa ndi magalasi ang'onoang'ono, gwedezani, ndikuwongolera ndende yake.
Kuwerengera: Tengani 0.25g ya sodium oxalate yowuma kuti ikhale yolemera nthawi zonse pa 1050C, yesani molondola, onjezerani 100ml ya sulfuric acid solution (8 + 92) ndikuyambitsa kuti musungunuke.Onjezani mwachangu 25ml ya njira yokhazikika ya KMnO4 kuti iwerengedwe mu yankho kuchokera ku freet.Ikazimiririka, itenthetseni mpaka 650C ndikupitilirabe mpaka yankho litakhala lofiira ndikukhalabe losasinthika kwa 30s.Pamapeto a titration, kutentha kwa yankho sikuyenera kukhala kotsika kuposa 550C, ndipo mayeso opanda kanthu adzachitika nthawi yomweyo.6.7mg iliyonse ya sodium oxalate ndi yofanana ndi 1ml ya 0.02mol/L KMnO4 yankho lokhazikika.Kuchuluka kwenikweni kwa yankholi kumawerengedwa molingana ndi kumwa kwa yankholi komanso kuchuluka kwa sodium oxalate yomwe yatengedwa.
d.C (KMnO4)=0.002 mol/L: Tengani 0.02 mol/L KMnO4 ndikuwonjezera madzi kuti musungunuke kakhumi musanagwiritse ntchito
e.Sodium thiosulfate (0.1 mol/L): kulemera 26g Na2S2O3.5H2O kapena 16g anhydrous Na2S2O3, onjezerani 0.2g anhydrous sodium carbonate, sungunulani mu madzi 1000ml, wiritsani pang'onopang'ono kwa 10min, muziziziritsa, onjezerani madzi awiri mutatha 10. masabata, ndikuwongolera ndende yake.
Calibration: kulemera kwa 0.18g ya potaziyamu dichromate zouma pa 1200C mpaka kulemera kosalekeza.Yesani molondola.Ikani mu botolo loyezera ayodini, sungunulani mu 25ml wa madzi, onjezerani 2g ya potaziyamu iodide ndi 20ml ya dilute sulfuric acid (20%), gwedezani bwino, ikani malo amdima kwa 10min, kuwonjezera 150ml ya madzi, titrate it. ndi yankho la Na2S2O3 lokonzedwa [c (Na2S2O3) ＝ 0.1 mol/L], onjezerani 2ml ya wowuma chizindikiro yankho (10g/L) kumapeto, pitirizani titrating mpaka yankho kusintha buluu wobiriwira wowala, ndi kuyesa opanda kanthu pa nthawi yomweyo.1ml iliyonse ya Na2S2O3 (0.1 mol/L) ndi yofanana ndi 4.9031mg ya potassium dichromate.Kuchuluka kwa yankholi kumawerengedwa molingana ndi kumwa kwa yankholi komanso kuchuluka kwa potaziyamu dichromate yomwe yatengedwa.
f.C (Na2S2O3) ＝ 0.01 mol/L: tsitsani 0.1 mol/L Na2S2O3 ndi madzi owiritsa kumene ndi ozizira musanayime kakhumi.
Nthawi yotumiza: Oct-04-2022
