Kev ua tau zoo ntawm hydroxypropyl methylcellulose (HPMC) capsules yog ze ze rau qhov tsis xws li nws qhov kev hloov pauv, viscosity, thiab purity. Yog li ntawd, cov txheej txheem kev ntsuas tus qauv yog tsim nyog los xyuas kom meej tias nws zoo raws li daim ntawv thov. Cov txheej txheem kuaj no suav nrog ntau yam kev ntsuas tseem ceeb, suav nrog kev tshuaj xyuas tshuaj, tshuaj xyuas lub cev, thiab cov txheej txheem ntsuas ntsuas, muaj feem xyuam rau cov xwm txheej xws li kev tswj hwm kev tsim khoom, R&D optimization, kawg- ntawv pov thawj, thiab kev lag luam ntshuam/export.
Cov ntsuas tseem ceeb rau HPMC suav nrog qib kev hloov pauv (methoxy thiab hydroxypropoxy cov ntsiab lus), viscosity, cov ntsiab lus ntawm cov dej noo (poob ntawm ziab), cov hmoov tshauv (residue ntawm ignition), pH tus nqi (acidity/alkalinity), gelation kub, thiab dej-insoluble teeb meem.
Qib ntawm kev hloov pauv feem ntau yog txiav txim siab siv roj chromatography (GC) lossis nuclear magnetic resonance (NMR). viscosity yog ntsuas los ntawm kev siv lub viscometer rotational (xws li Brookfield type). Cov ntsiab lus noo noo yog ntsuas los ntawm Karl Fischer txoj kev. Cov ntsiab lus tshauv yog ntsuas los ntawm kev ntsuas kub ntawm - qhov kub thiab txias (piv txwv li, muffle furnace). Tus nqi pH yog ntsuas los ntawm kev ntsuas pH precision. Gel kub tuaj yeem ntsuas qhov muag lossis spectrophotometrically. Cov ntsiab lus HPMC hauv kev tsim qauv tuaj yeem txiav txim siab siv txoj kev diphenylamine colorimetric (spectrophotometry).
