Ungayibona njani i-ash content ye-hydroxypropyl methylcellulose?

Umxholo wothuthu luphawu olubalulekileyoi-hydroxypropyl methylcellulose. Abathengi abaninzi badla ngokubuza ukuba xa beyiqonda i-hydroxypropyl methylcellulose: lithini ixabiso lothuthu? I-Hydroxypropyl methylcellulose enomxholo omncinci wothuthu ithetha ubunyulu obuphezulu; i-cellulose enomxholo omkhulu wothuthu ithetha ukuba kukho ukungcola okuninzi kuyo, okuya kuchaphazela isiphumo sokusetyenziswa okanye kwandise inani lokongeza. Xa abathengi bekhetha i-hydroxypropyl methylcellulose, badla ngokukhanyisa ngokuthe ngqo i-cellulose ethile ngomlilo baze bayitshise ukuze bavavanye umxholo wothuthu lwe-cellulose. Kodwa le ndlela yokufumanisa ayihambelani nesayensi, kuba abavelisi abaninzi bongeza izinto ezikhawulezisa ukutsha kwi-cellulose. Ngaphezulu, i-cellulose inothuthu oluncinci kakhulu emva kokutsha, kodwa ekusebenzeni, ukugcinwa kwamanzi kwe-hydroxypropyl methylcellulose akulunganga kangako.

Ngoko ke singawubona njani ngokuchanekileyo umxholo wothuthu lwe-hydroxypropyl methylcellulose? Indlela echanekileyo yokufumanisa kukusebenzisa i-muffle furnace ukuze siwubone.

Ibhalansi yohlalutyo lwesixhobo, isithando somlilo esinobushushu obuphezulu, isithando sombane.

Inkqubo yovavanyo:

1) Okokuqala, faka i-30ml porcelain crucible kwisithando somlilo esishushu kakhulu uze uyitshise kwi-(500~600) °C imizuzu engama-30, uvale isango lesithando somlilo ukuze wehlise ubushushu kwisithando somlilo bube ngaphantsi kwama-200°C, uze ukhuphe i-crucible uyihambise kwi-desiccator ukuze iphole (20~30 min), uyilinganisele.

2) Ubunzima be-1.0 gi-hydroxypropyl methylcelluloseKwibhalansi yohlalutyo, faka isampuli elinganisiweyo kwi-crucible, uze ubeke i-crucible equlethe isampuli kwi-furnace yombane ukuze i-carbonization, uyipholise kubushushu begumbi, yongeza i-sulfuric acid (0.5-1.0) ml, uze uyibeke kwi-furnace yombane ukuze i-carbonization iphelele. Emva koko yiya kwi-furnace yobushushu obuphezulu, uyitshise kwi-(500~600) ℃ iyure e-1, ucime amandla e-furnace yobushushu obuphezulu, xa ubushushu be-furnace buhla ngaphantsi kwama-200 ℃, yikhuphe uyibeke kwi-desiccator ukuze iphole (20~30 min), uze uyilinganise kwibhalansi yohlalutyo.

Ukubala Intsalela yokutsha ibalwa ngokwefomula (3):

m2-m1

Intsalela yokutshisa (%) = ×100………………(3)

m

Kwifomyula: m1 – ubunzima be-crucible engenanto, kwi-g;

m2 – ubunzima bentsalela kunye ne-crucible, kwi-g;

m – ubunzima besampuli, kwi-g.