nzira dzekuyedza
Zita renzira: hypromellose—kusarudzwa kweboka rehydroxypropoxy—kusarudzwa kweboka rehydroxypropoxy
Mashandisirwo ekushandisa: Nzira iyi inoshandisa nzira yekutsvaga hydroxypropoxy kuona huwandu hwehydroxypropoxy mu hypromellose. Nzira iyi inoshandawo kune hypromellose.
Nheyo yenzira yacho:Verengahuwandu hwehydroxypropoxy muchinhu chakaedzwa zvichienderana nenzira yekuona hydroxypropoxy.
Chinogadzirisa:
1. 30% (g/g) mhinduro ye chromium trioxide
2. Hydroxide
3. Mhinduro yechiratidzo chePhenolphthalein
4. Sodium bicarbonate
5. Sanganisa sulfuric acid
6. Potassium iodide
7. Sodium thiosulfate titration solution (0.02mol/L)
8. Mhinduro yekuratidza sitachi
midziyo:
Kugadzirira muenzaniso:
1. Sodium hydroxide titration solution (0.02mol/L)
Kugadzirira: Tora 5.6mL ye sodium hydroxide solution yakachena, wedzera mvura inotonhora yakafashaidzwa kuti iite 1000mL.
Kuenzanisa: Tora inenge 6g ye potassium hydrogen phthalate yakaomeswa pa105°C kuti iite huremu hwakaenzana, ireme nemazvo, wedzera 50mL yemvura inotonhora ichangobva kufashaidzwa, zunza kuti inyungudike zvakanyanya sezvinobvira; wedzera madonhwe maviri e phenolphthalein indicator solution, shandisa iyi Liquid titration, kana wasvika pakupera, potassium hydrogen phthalate inofanira kunyungudika zvachose, uye kunyungudika kusvika mhinduro yava pink. 1mL yega yega ye sodium hydroxide titration solution (1mol/L) yakaenzana ne20.42mg ye potassium hydrogen phthalate. Verenga huwandu hwemhinduro iyi zvichibva pakushandiswa kwemhinduro iyi uye huwandu hwe potassium hydrogen phthalate inotorwa. Wedzera huwandu kashanu kuti huwandu huve 0.02mol/L.
Kuchengetera: Isa mubhodhoro repurasitiki repolyethylene worichengeta rakavharika; mune maburi maviri mupuragi, uye chubhu imwe yegirazi inopinzwa mugomba rega rega, chubhu imwe yakabatana nechubhu yesoda lime, uye chubhu imwe chete inoshandiswa kuburitsa mvura.
2. Mhinduro yePhenolphthalein inoratidza Tora 1g yephenolphthalein, wedzera 100mL yeethanol kuti inyungudike
3. Sodium thiosulfate titration solution (0.02mol/L) Kugadzirira: Tora 26g yesodium thiosulfate uye 0.20g yesodium carbonate ine anhydrous, wedzera huwandu hwakakodzera hwemvura inotonhora yakafashaidzwa kuti inyunguduke kuita 1000mL, zunza zvakanaka, woiisa kwesefa yemwedzi 1. Kuenzanisa: tora inenge 0.15g ye potassium dichromate yakaomeswa pa120°C nehuremu hwakaenzana, ireme nemazvo, iise mubhodhoro re iodine, wedzera 50mL yemvura kuti inyunguduke, wedzera 2.0g ye potassium iodide, zunza zvinyoro nyoro kuti inyunguduke, wedzera 40mL ye sulfuric acid yakasanganiswa, Zunza zvakanaka wovhara zvakasimba; mushure memaminitsi gumi munzvimbo ine rima, wedzera 250mL yemvura kuti inyunguduke, uye kana mhinduro yaiswa titration kusvika padyo nepanogumira, wedzera 3mL ye starch indicator solution, ramba uchiisa titration kusvika ruvara rwebhuruu rwapera uye rwava girini yakajeka, uye mhedzisiro ye titration inoshandiswa se Trial correction isina chinhu. 1mL yega yega ye sodium thiosulfate (0.1mol/L) yakaenzana ne4.903g ye potassium dichromate. Verenga huwandu hwemushonga zvichienderana nekunwiwa kwemushonga uye huwandu hwe potassium dichromate inotorwa. Wedzera huwandu hwemushonga kashanu kuti huwandu hwemushonga huve 0.02mol/L. Kana tembiricha yemukamuri iri pamusoro pe25°C, tembiricha yemushonga wemhinduro nemvura inosanganiswa inofanira kutonhodzwa kusvika pa20°C.
4. Mushonga wekuratidza sitachi. Tora 0.5g yesitachi inonyunguduka, wedzera 5mL yemvura wokurunga zvakanaka, wobva wadurura zvishoma nezvishoma mu100mL yemvura iri kufashaira, kurunga sezvainowedzerwa, ramba uchifashaira kwemaminitsi maviri, rega itonhore, dururira supernatant, uye inenge yagadzirira.
Mushonga uyu unofanira kugadzirwa patsva usati washandiswa.
Matanho ekushanda: Tora 0.1g yechigadzirwa ichi, chiyere nemazvo, chiise mubhodhoro redhisiki D, wedzera 10mL ye30% (g/g) cadmium trichloride solution. Zadza chubhu inogadzira mweya B nemvura pajoini, wobatanidza distillation unit. Nyika B neD mubhavhu remafuta (rinogona kuva glycerin), ita kuti huwandu hwemvura mubhavhu remafuta huenderane nehuwandu hwemvura hwemhinduro yecadmium trichloride mubhodhoro D, vhura mvura inotonhorera, uye kana zvichidikanwa, rega nitrogen stream ipinde uye dzora huwandu hwemvura inoyerera kusvika kububble imwe pasekondi. Mukati memaminitsi makumi matatu, wedzera tembiricha yemubhavhu remafuta kusvika pa155ºC, uye chengetedza tembiricha iyi kusvika 50 mL yedistillate yaunganidzwa, bvisa chubhu yecondenser kubva muchikamu chekupatsanura, sukurudza nemvura, geza woisa mumushonga wakaunganidzwa, wedzera madonhwe matatu emhinduro ye phenolphthalein indicator, uye titrate kusvika pa. pH kukosha kwayo i6.9-7.1 (yakayerwa ne acidity meter), nyora vhoriyamu yakadyiwa V1 (mL), wobva wawedzera 0.5g ye sodium bicarbonate uye 10mL ye dilute sulfuric acid, rega imire kusvika pasisina carbon dioxide, wedzera 1.0g ye potassium iodide, woivhara. Zunza zvakanaka, isa murima kwemaminitsi mashanu, wedzera 1mL ye starch indicator solution, titrate ne sodium thiosulfate titration solution (0.02mol/L) kusvika pakupera, nyora vhoriyamu yakadyiwa V2 (mL). Mune imwe bvunzo isina chinhu, nyora mavhoriyamu eVa neVb (mL) e sodium hydroxide titration solution (0.02mol/L) uye sodium thiosulfate titration solution (0.02mol/L) zvichiteerana.
Nguva yekutumira: Kubvumbi-25-2024