Nzira yekuona sei madota e hydroxypropyl methylcellulose?

Ash content chiratidzo chakakosha chehydroxypropyl methylcellulose. Vatengi vazhinji vanowanzobvunza kana vachinzwisisa hydroxypropyl methylcellulose: chii chakakosha madota? Hydroxypropyl methylcellulose ine madota madiki zvinoreva kuchena kwepamusoro; cellulose ine madota makuru zvinoreva kuti kune zvakawanda zvakasvibiswa mairi, izvo zvinokanganisa kushandiswa kwekushandisa kana kuwedzera huwandu hwekuwedzera. Kana vatengi vakasarudza hydroxypropyl methylcellulose, vanowanzo vheneka imwe cellulose nemoto voipisa kuti vaedze madota ari muselulosi. Asi iyi nzira yekuona haina hunyanzvi hwesainzi, nekuti vagadziri vazhinji vanowedzera zvinokonzeresa kupisa kune cellulose. Pamusoro, iyo cellulose ine madota mashoma mushure mekupisa, asi mukuita, kuchengetwa kwemvura yehydroxypropyl methylcellulose hakuna kunaka.

Saka isu tinofanira kuona sei nemadota emukati mehydroxypropyl methylcellulose? Iyo chaiyo yekuona nzira ndeye kushandisa muffle furnace kuona.

Instrument Analytical balance, high tembiricha muffle furnace, electric furnace.

Kuedza maitiro:

1) Kutanga, isa 30ml porcelain crucible muchoto chepamusoro-soro uye upise pa (500 ~ 600) ° C kwemaminitsi makumi matatu, vhara gedhi rechoto kuti udzikise tembiricha muchoto kusvika pasi pe200 ° C, wozotora. buritsa crucible uye uendese kune desiccator kuti itonhore (20 ~ 30) min, kuyera.

2) Kuyera 1.0 g yehydroxypropyl methylcellulosepachiyero chekuongorora, isa sample yakayerwa mucrucible, woisa crucible ine sample pachoto chemagetsi checarbonization, inotonhorera kusvika kukamuri tembiricha, wedzera sulfuric acid (0.5-1.0) ml, woiisa pachoto chemagetsi yakakwana carbonization. Wobva waenda kune yakakwira tembiricha muffle furnace, pisa pa (500 ~ 600) ℃ kweawa imwe, dzima simba reyakanyanya tembiricha muffle furnace, kana tembiricha yechoto ichidonha pasi pe200 ℃, ibudise uye uiise mudhishi. kutonhora (20 ~ 30) min, uye wozoyerwa pachiyero chekuongorora.

Calculation Ignition residue inoverengerwa zvinoenderana neformula (3):

m2-m1

Ignition residue (%) = ×100…………………………(3)

m

Muchigadziro: m1 - kuwanda kwe crucible isina chinhu, mu g;

m2 - huwandu hwezvasara uye crucible, mu g;

m - kuwanda kwemuenzaniso, mu g.