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 Ukulinganisa: Thatha cishe u-0,15g we-potassium dichromate eyenziwe nge-120 ° C enesisindo esingaguquki, engeza i-adven ye-potantuium iodide, afake u-40ml we-sulfuric acid, afake u-40ml we-sulfuric acid, afake uphawu kahle; Ngemuva kwemizuzu eyi-10 endaweni emnyama, engeza ama-250ml amanzi ukuze unciphise, futhi lapho isixazululo sithethwe esiseduze nephoyinti lokugcina, qhubeka nombala we-Starch isikhombisi, qhubeka nombala ohlaza okwesibhakabhaka, futhi okuluhlaza okukhanyayo kusetshenziswa njengokulungiswa kwecala elingenalutho. 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.
I-4. Isixazululo senkomba yesitashi sithathe i-0.5g ye-soluble Starch, engeza ama-5ml amanzi bese uvusa kahle, bese ulithulula kancane kancane, qhubeka nokubilisa, uthele umphezulu, futhi usukulungele.
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 le-cadmium Trichloride Solution ebhodleleni d, futhi uma kunesidingo, vumela umfula we-nitrogen ungene futhi alawule ukugeleza kwawo nge-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 we-phenolphthalein colog, bese usula i-acidity meter), qopha ivolumu esetshenzisiwe), bese ubhala I-0.5g ye-sodium bicarbonate kanye ne-10ml ye-sulfuric acid, mayikume kuze kube yilapho kungabikho khona i-carbon dioxide, engeza i-1ml ye-starch Thiosulfate Isixazululo Sokuthathwa, ukuqopha 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