Majekiseni Anoraswa - Appendikisi 1
Kugadzirira kwe ethylene oxide residual solution
0.1mol/L hydrochloric acid: dilute 9ml hydrochloric acid kusvika 1000ml.
0.5% periodate solution: kuyera 0.5g ye periodate uye diluted kusvika 100ml.
Sodium thiosulfate mhinduro: kuyera 1g yesodium thiosulfate uye dilute kusvika 100ml.
10% sodium sulfite solution: uremu 10. 0g anhydrous sodium sulfite, inyunguduse uye inyungudze kusvika ku100ml.
Magenta sulfurous acid test solution: kuyera 0.1g ye basic fuchsin uye wedzera 120ml yemvura inopisa kuti inyunguduse.Mushure mekutonhora, wedzera 20ml ye10% sodium sulfite solution uye 2ml yehydrochloric acid murima.Mushonga wekuedza unofanira kunge usina ruvara.Kana ikawanikwa yakatsvuka, inofanira kugadzirwa zvakare.
Ethylene glycol standard stock solution: tora yekunze yakaoma uye yakachena 50ml volumetric flask, wedzera nezve 30ml yemvura, uiyere nemazvo, tora 0.5ml ethylene glycol, kurumidza kuwedzera mubhodhoro, zunza, uremedze, mutsauko pakati pe huremu huviri huremu huri mumushonga, wedzera mvura pachikero, sanganisa, uye uverenge kumisa kwayo zvichienderana neinotevera fomula:
C＝W/50 × chiuru chimwe
C: Glycol standard stock solution concentration g/l;
W: Huremu hwe ethylene glycol mumushonga g
Ethylene glycol standard solution: tora nemazvo 1.0ml yeyakajairwa stock solution, uye dilue kusvika 1000ml nemvura.
Kugadzirira nyore oxidized reagent:
a.Dilute sulfuric acid (20%): Tora H2SO4128ml, zvishoma nezvishoma jekiseni 500mL, uye dilute kusvika 1000mL mushure mekutonhora.
b.Starch chiratidzo: tora 0.5g ye starch yakanyungudika, inyungudise mu 100ml yemvura, kupisa uye kuifashaidza, wozoitonhodza kuitira kumira (ichave ichangobva kugadzirwa kana ichishandiswa kwenguva pfupi)
c.Potassium permanganate solution: tora 3.3gKMnO4, wedzera 1050ml yemvura, bika kwemaminetsi gumi nemashanu, wedzera mvura kusvika 1050ml, woisiya kuti imire kweanopfuura mazuva maviri mushure mekuiswa chisimbiso, woisefa negirazi regirazi funnel, zunza kumusoro, uye gadzirisa kugadzikana kwayo.
Calibration: Tora 0.25g yereferensi sodium oxalate yakaomeswa kuti igare uremu pa1050C, uiyere nemazvo, wedzera 100ml yesulfuric acid solution (8 + 92) uye simbisa kuti iparadze.Kurumidza wedzera 25ml yeKMnO4 yakajairwa mhinduro kuti ienzaniswe mumhinduro kubva ku buret.Mushure mekupera, dziidze kusvika 650C uye ramba uchiita titrating kusvika mhinduro yatsvuka uye inoramba isina kushanduka kwe30s.Pakupera kweiyo titration, tembiricha yemhinduro haizodzike kupfuura 550C, uye bvunzo isina chinhu ichaitwa panguva imwe chete.Yese 6.7mg yesodium oxalate yakaenzana ne1ml ye0.02mol/L KMnO4 yakajairwa mhinduro.Iko kusanganiswa kweiyo mhinduro inoverengerwa maererano nekushandiswa kweichi mhinduro uye huwandu hwe sodium oxalate inotorwa.
d.C (KMnO4)=0.002 mol/L: Tora 0.02 mol/L KMnO4 wowedzera mvura kuinyungudutsa kagumi usati washandisa
e.Sodium thiosulfate (0.1 mol/L): huremu 26g Na2S2O3.5H2O kana 16g anhydrous Na2S2O3, wedzera 0.2g anhydrous sodium carbonate, inyungudise mumvura 1000ml, bika zvishoma nezvishoma kwemaminitsi gumi, itonhorere, woisa maviriml pagumi mavhiki, uye gadzirisa iko kurongeka kwayo.
Calibration: uremu 0.18g yereferensi potassium dichromate yakaomeswa pa 1200C kuti irambe ichirema.Weresa nemazvo.Iise mubhodhoro rekuyeresa iodine, inyungudise mu 25ml yemvura, wedzera 2g ye potassium iodide uye 20ml ye dilute sulfuric acid (20%), zunza zvakanaka, isa munzvimbo ine rima kwemaminitsi gumi, wedzera 150ml yemvura, titrate it. nemhinduro yakagadziriswa yeNa2S2O3 [c (Na2S2O3) ＝ 0.1 mol/L], wedzera 2ml ye starch indicator solution (10g/L) pakupera, ramba uchiita titrating kusvika mhinduro yachinja kubva kublue kuenda kugirinhi yakapenya, uye ita bvunzo isina chinhu pa nguva imwe chete.Yese 1ml yeNa2S2O3 (0.1 mol/L) yakaenzana ne4.9031mg ye potassium dichromate.Iko kusungirirwa kwemhinduro iyi kunoverengerwa maererano nekudyiwa kwemhinduro iyi uye huwandu hwe potassium dichromate yakatorwa.
f.C (Na2S2O3) ＝ 0.01 mol/L: dilute 0.1 mol/L Na2S2O3 nemvura ichangobva kufashaidzwa uye kutonhodzwa usati wamira kanokwana kagumi.
Nguva yekutumira: Oct-04-2022
