uburyo bwo gupima
Izina ry'uburyo: hypromellose—kumenya itsinda rya hydroxypropoxy—kumenya itsinda rya hydroxypropoxy
Ingano y'ikoreshwa: Ubu buryo bukoresha uburyo bwo kumenya hydroxypropoxy kugira ngo bumenye ingano ya hydroxypropoxy muri hypromellose. Ubu buryo bukoreshwa kuri hypromellose.
Ihame ry'uburyo:Baraibikubiye muri hydroxypropoxy mu gicuruzwa cy’igerageza hakurikijwe uburyo bwo gusuzuma hydroxypropoxy.
Reagent:
1. 30% (g/g) umuti wa kromiyumu trioxide
2. Hydroxyde
3. Umuti w'ikimenyetso cya Phenolphthalein
4. Sodiyumu bikarubonate
5. Kuramo aside sulfuriki
6. Iyode ya potasiyumu
7. Umuti wa sodium thiosulfate titration (0.02mol/L)
8. Igisubizo cy'ikimenyetso cy'ibinyabutabire
ibikoresho:
Icyitegererezo cyo gutegura:
1. Umuti wa sodium hydroxide titration (0.02mol/L)
Uko byateguwe: Fata 5.6mL y'umuti wa sodium hydroxide yuzuye, ongeramo amazi akonje ashyushye kugira ngo ube 1000mL.
Gupima: Fata hafi garama 6 za phthalate ya potasiyumu yumye ku bushyuhe bwa 105°C kugira ngo ubone uburemere buhoraho, uyipime neza, ongeramo mililitiro 50 z'amazi akonje ashyushye, uzungagize kugira ngo ishonge neza uko bishoboka kose; ongeramo ibitonyanga 2 bya phenolphthalein indicator solution, koresha iyi Liquid titration, iyo wegereye aho igarukira, phthalate ya potasiyumu hydrogène igomba gushonga burundu, hanyuma igashonga kugeza igihe umuti ubaye umutuku. Buri mililitiro 1 ya sodium hydroxide titration solution (1mol/L) ingana na 20.42mg ya phthalate ya potasiyumu hydrogène. Gerageza kubara ingano y'uyu muti ukurikije ikoreshwa ry'uyu muti n'ingano ya phthalate ya potasiyumu hydrogène yafashwe. Ongeramo inshuro 5 kugira ngo ingano ibe 0.02mol/L.
Kubika: Shyira mu icupa rya pulasitiki rya polyethylene hanyuma ukomeze ufunze; hari imyobo ibiri mu gipfundikizo, hanyuma umuyoboro umwe w'ikirahure ushyirwa muri buri mwobo, umuyoboro umwe uhujwe n'umuyoboro wa soda lime, kandi umuyoboro umwe ukoreshwa mu gukurura amazi.
2. Umuti w'ikimenyetso cya Phenolphthalein Fata 1g ya phenolphthalein, ongeramo 100mL ya ethanol kugira ngo ishonge
3. Umuti wa sodium thiosulfate (0.02mol/L) Gutegura: Fata garama 26 za sodium thiosulfate na garama 0.20 za sodium carbonate idafite amazi, ongeramo amazi akonje ashyushye akwiye kugira ngo ashonge muri mililitiro 1000, uzunguze neza, hanyuma uyashyire mu kayunguruzo k'ukwezi 1. Gupima: Fata garama 0.15 za potasiyumu dichromate yumye ku bushyuhe bwa 120°C hamwe n'uburemere buhoraho, uyipime neza, uyishyire mu icupa rya iyode, ongeramo mililitiro 50 z'amazi kugira ngo ishonge, ongeramo garama 2.0 za iyode potasiyumu, uzunguze buhoro kugira ngo ishonge, ongeramo mililitiro 40 za aside sulfure ivanze, uzunguze neza hanyuma ufunge neza; nyuma y'iminota 10 ahantu hijimye, ongeramo mililitiro 250 z'amazi kugira ngo ishonge, kandi iyo umuti ushyizwe hafi y'aho ugarukira, ongeramo mililitiro 3 z'umuti wa sitashi, komeza uzunguze kugeza igihe ibara ry'ubururu rizimiye kandi ribe icyatsi kibisi cyerurutse, kandi igisubizo cya titration gikoreshwa nk'isuzuma ry'igerageza ridafite ikintu. Buri ml 1 ya sodium thiosulfate (0.1mol/L) ingana na garama 4.903 za potasiyumu dichromate. Gerageza kubara ingano y'umuti ukurikije uko umuti ukoreshejwe n'ingano ya potasiyumu dichromate yafashwe. Shyiramo amazi mu buryo bw'ikigereranyo inshuro 5 kugira ngo ingano ibe 0.02mol/L. Niba ubushyuhe bw'icyumba buri hejuru ya dogere selisiyusi 25, ubushyuhe bw'umuti urimo guhumeka n'amazi asanzwe agomba gukonjeshwa kugeza kuri dogere selisiyusi 20.
4. Umuti werekana ibinyampeke Fata garama 0.5 z'ibinyampeke bishongesha, ongeramo garama 5 z'amazi hanyuma uvange neza, hanyuma usuke buhoro buhoro muri garama 100 z'amazi abira, uvange uko yongerwamo, komeza uteke mu minota 2, ureke bikonje, usukemo supernatant, maze bibe byarangiye.
Uyu muti ugomba gutegurwa vuba mbere yo kuwukoresha.
Intambwe zo gukora: Fata 0.1g y'iki gicuruzwa, ugipime neza, ugishyire mu icupa rya D, ongeramo 10mL y'umuti wa cadmium trichloride wa 30% (g/g). Uzuza amazi mu muyoboro wa B utanga umwuka, hanyuma uhuze agakoresho ka distillation. Shyiramo B na D mu mwobo w'amavuta (ushobora kuba glycerin), shyira urwego rw'amazi mu mwobo w'amavuta ruhuze n'urugero rw'amazi mu mwobo wa cadmium trichloride mu icupa rya D, fungura amazi akonje, kandi nibiba ngombwa, ureke umugezi wa azote winjiremo hanyuma ugenzure umuvuduko wawo kugeza ku kirometero 1 ku isegonda. Mu minota 30, shyira ubushyuhe bw'amavuta mu bwogero kugeza kuri 155ºC, kandi ukomeze ubu bushyuhe kugeza 50 mL ya distillate ikusanyijwe, kuramo umuyoboro wa condenser mu gice cyo kugabanyamo ibice, oza n'amazi, oza hanyuma ushyire mu gikoresho cyakusanyijwe, ongeramo ibitonyanga 3 bya phenolphthalein indicator solution, hanyuma ushyire kuri titrate. Agaciro ka pH ni 6.9-7.1 (gapimwe hakoreshejwe meter y'ubushyuhe), andika ingano ya V1 (mL), hanyuma ongeramo 0.5g ya sodium bicarbonate na 10mL ya aside sulfurique dilute, ubireke bihagarare kugeza igihe dioxide de carbone itazongera gukorwa, ongeramo 1g ya iyode potasiyumu, hanyuma ubifunge. Kangura neza, shyira mu mwijima mu gihe cy'iminota 5, ongeramo 1mL y'ingano ya sitashi, shyiramo titrate hamwe na sodium thiosulfate titration solution (0.02mol/L) kugeza aho bigarukira, andika ingano ya V2 (mL). Mu kindi kizamini cy’ubusa, andika ingano ya Va na Vb (mL) by’umuti wa sodium hydroxide titration (0.02mol/L) n’umuti wa sodium thiosulfate titration (0.02mol/L) uko bikurikirana.
Igihe cyo kohereza: 25 Mata 2024