Izindlela Zokuhlola
Igama Lendlela: I-Hypromellose-Ukunqunywa kweHypromellose kweqembu le-hydroxypropoxy gerow yeqembu le-hydroxypropopopopopopopopopoxy Group
Scope of Isicelo: Le ndlela isebenzisa indlela ye-hydroxypropoxy yokunquma okuqukethwe kwe-hydroxypropoxy eHypromellose. Le ndlela isebenza kwi-Hypromellose.
Umgomo wendlela:UkubalaOkuqukethwe kwe-hydroxypropoxy kumkhiqizo wokuhlola ngokuya ngendlela ye-hydroxypropoxy.
I-Reagent:
1. I-30% (G / G) Chromium Trioxide Solution
2. I-Hydroxide
3. Ikhambi lenkomba ye-Phenolphthalein
4. I-sodium bicarbonate
I-5. Dlulisa i-sulfuric acid
6. I-Potassium iodide
7. I-Sodium Thiosulfate Dication Solution (0.02mol / l)
8. Isixazululo senkomba yesitashi
Izinsiza:
Ukulungiswa kwesampula:
1. Isixazululo Sokuthathwa Kwe-Sodium Hydroxide Solution (0.02mol / l)
Ukulungiselela: Thatha u-5.6ml wekhambi elicacile le-sodium hydroxide solution, engeza amanzi abandayo asanda kubilika ukuze akwenze kube yi-1000ml.
Ukulinganisa: Thatha cishe ama-6g we-potassium hydrogen hydrogen eyomile ku-105 ° C kuya kwesisindo esingaguquki, asihlole ngokunemba, engeza ama-50ml wamanzi abandayo asanda kubilinda, afake ukuwenza kuncibilike ngangokunokwenzeka; Ngeza amaconsi ama-2 wekhambi lenkomba ye-Phenolphthalein, sebenzisa lokhu kuthathwa koketshezi, lapho usondela endaweni yokugcina, i-potassium hydrogen perthalate kufanele ichithwe ngokuphelele, bese kubhalwa phansi kuze kube yilapho ikhambi liba lipinki. Njalo i-1ml yeSodium Hydroxide Stivation Solution (1mol / l) ilingana no-20.42mg we-potassium hydrogen perthalate. Bala ukugcwaliseka kwalesi sixazululo kususelwa ekusetshenzisweni kwalesi sixazululo kanye nenani le-potassium hydrogen phthalate ethathwe. Ngobuningi banciphise izikhathi ezi-5 ukwenza okuhlushwa 0.02mol / l.
Isitoreji: Beka ebhodleleni lepulasitiki le-polyethylene bese uligcina livaliwe; Kunezimbobo ezi-2 ku-plug, kanye ne-1 tube yengilazi ifakwe emgodini ngamunye, ishubhu eli-1 lixhumene neshubhu le-soda lime, futhi ishubhu eli-1 lisetshenziselwa ukuncela uketshezi.
2 Ikhambi lenkomba ye-Phenolphthalein Thatha i-1g ye-Phenolphthalein, engeza i-100ml ye-ethanol ukuze ichithe
3 Hlunga. Ukulinganisa: Thatha cishe u-0.15g we-potassium dichromate eyenziwe ngo-120 ° C enesisindo esingaka, engeza i-50ml yamanzi, engeza i-2.0g yamanzi ukuze uncibilike, engeza kahle I-40ml ye-Dluli Sulfuric Acid, Shake kahle bese ubopha uphawu; Ngemuva kwemizuzu eyi-10 endaweni emnyama, engeza ama-250ML wamanzi ukuze unciphise, futhi lapho isixazululo sithethwe esiseduze nephuzu lokugcina, engeza i-3ml yesixazululo senkomba yesitashi, qhubeka nombala ohlaza okwesibhakabhaka ugcwala isetshenziswa njengokulungiswa kwesivivinyo esingenalutho. Njalo i-1ml yeSodium Thiosulfate (0.1mol / l) ilingana ne-4.903g ye-potassium dichromate. Bala ukuhlanganiswa kwesisombululo ngokuya ngokusetshenziswa kwesisombululo nenani le-potassium dichromate ethathwe. Ngobuningi banciphise izikhathi ezi-5 ukwenza okuhlushwa 0.02mol / l. Uma izinga lokushisa lekamelo lingaphezulu kwama-25 ° C, izinga lokushisa lesisombululo sokusabela kanye namanzi e-dilution kufanele aphonswe ku-20 ° C.
4. Isixazululo senkomba yesitashi sithathe i-0.5g ye-soluble Starch, engeza ama-5ml amanzi bese uvusa kahle, bese ulithulula kancane ungene ku-100ml wamanzi abilayo, qhubeka nokubilisa, athulule i-supernatan, Futhi sekumi ngomumo.
Lesi sixazululo kufanele silungiselelwe sanda ngaphambi kokusetshenziswa.
Izinyathelo zokusebenza: Thatha i-041g yalo mkhiqizo, ulihlole ngokunemba, ubeke ebhodleleni le-distillation d, engeza i-10ml ye-30% (G / g) Cadmium Trichloride Solution. Gcwalisa i-tum ekhiqiza ishubhu b ngamanzi kuya kokuhlanganiswa, bese uxhuma uphiko lwe-distillation. Phesheya kwe-B no-D kubhavu kawoyela (kungaba yi-glycerin), yenza izinga loketshezi lokugeza uwoyela lihambisane nezinga loketshezi lwesixazululo se-cadmium Trichloride ebhodleleni d, kuvule amanzi apholile, futhi uma kunesidingo. Ukuhamba kwe-nitrogen ageleze futhi kulawule izinga lokugeleza kwalo kuya ku-1 bubble ngomzuzwana. Kungakapheli nemizuzu engama-30, phakamisa amazinga okushisa okugeza uwoyela kuya ku-155ºC, futhi ulondoloze lokhu kushisa kuze kube yilapho u-50 ml wekholamu we-distillate, asuse ngamanzi, ageze futhi afake kwikhambi eliqoqiwe, engeza u-3 amaconsi esixazululo senkomba ye-phenolphthalein, bese ubopha ngenani le-PH ngu-6.9-7.1 (kulinganiswe nge-acidity meter), bese ubeka i-0.5g ye-sodium bicarbonale ne-10ml ye-dilute sulfuric acid, ake ame Kuze kube yilapho kukhiqizwa khona i-carbon dioxide, engeza i-1.0g ye-potassium iodide, bese usayina kahle, faka kahle i-starch yekhambi le-5, engeza i-soosulfate isixazululo se-starch, u-0.02mol / L) ukuze Iphuzu lokugcina, qopha ivolumu esetshenzisiwe v2 (ml). Kokunye ukuhlola okungenalutho, qopha amavolumu VA ne-VB (ML) yesixazululo sokuthathwa kwesixazululo se-sodium hydroxide esidliwayo (0.02mol / l) kanye ne-sodium thiosulfate sokuthathwa kwesixazululo (0.02mol / l) ngokulandelana.
Isikhathi sePosi: APR-25-2024