Cov txheej txheem yooj yim thiab yooj yim kom paub qhov txawv ntawm HPMC cellulose zoo

Txoj hauv kev yooj yim thiab yooj yim kom paub qhov zoo ntawm HPMC cellulose:

1. Qhov pom lub xeev ntawm cov ntshiab HPMC cellulose yog fluffy, thiab qhov ntom ntom me me, nrog rau ntau yam ntawm 0.3-0.4g / ml; Adulterated HPMC cellulose muaj fluidity zoo dua thiab hnyav dua tes, uas yog qhov txawv ntawm qhov zoo li cov khoom tseeb.

2. Qhov dawb huv ntawm HPMC cellulose yog qhov zoo, uas txhais tau hais tias cov khoom siv raw siv hauv kev tsim khoom yog ntshiab thiab cov tshuaj tiv thaiv zoo dua tsis muaj impurities. Piv nrog rau cov khoom lag luam txawv teb chaws cellulose ether, nws tuaj yeem pom tias cov khoom zoo nkauj ntawm cellulose ether yog ib txwm zoo dua li cov khoom lag luam thib ob.

3. Ntshiab HPMC cellulose aqueous tov yog qhov tseeb, nrog lub teeb pom kev zoo, thiab dej tuav tus nqi ≥ 97%; Cov tshuaj HPMC cellulose aqueous aqueous yog turbid, thiab cov dej tuav tus nqi yog qhov nyuaj rau ua tau raws li qhov yuav tsum tau ua. Lub teeb xa hluav taws xob ntawm cov tshuaj aqueous yog qhov zoo, uas qhia tau hais tias cov khoom muaj cov tshuaj tsis txaus thiab cov ntsiab lus siab ntawm cov khoom xyaw nquag.

4. Ntshiab HPMC cellulose yuav tsum tsis txhob hnov ​​​​qab ammonia, hmoov txhuv nplej siab thiab cawv; Adulterated HPMC cellulose feem ntau tuaj yeem hnov ​​​​txhua yam ntawm cov tsw. Txawm hais tias nws yog tasteless, nws yuav hnov ​​hnyav.

5. Pure HPMC cellulose hmoov yog fibrous nyob rau hauv microscope los yog magnifying iav; Lub HPMC cellulose uas tau deev luag poj luag txiv tuaj yeem pom tau tias yog cov khoom granular lossis siv lead ua nyob rau hauv lub microscope lossis iav magnifying.

6. Ib txoj kev sim yooj yim rau cov hmoov tshauv ntawm cellulose ether: hnyav ib mus rau ob grams ntawm cellulose ether, ignite nws nrog ib tug sib zog, hnyav cov tshauv seem tshuav los ntawm combustion ntawm cellulose ether, thiab thaum cov tshauv residue / cellulose ether yog ≥5. %, qhov zoo ntawm cellulose ether yog qhov tsis tsim nyog. (Muaj qee zaum yuam kev hauv txoj kev no. Ua ntej, cov chaw tsim khoom tsim cov khoom tsim nyog rau cov neeg siv khoom tshwj xeeb rau cov neeg siv khoom ua ntej tawm hauv lub Hoobkas; thib ob, cov neeg ua haujlwm lossis cov tuam txhab ntxiv cov khoom siv hluav taws xob nrog cov hmoov tshauv tsawg thaum deev)

7. Qee lub tsev tsim khoom thiab cov tsev neeg siv cov C cellulose me me sib xyaw rau hauv hydroxypropyl methyl cellulose ether, thiab thaum cov tshuaj aqueous ntawm C cellulose ntsib nrog tin, nyiaj, txhuas, txhuas, hlau, tooj liab thiab qee cov hlau hnyav, nag lossis daus tshwm sim tshwm sim; Thaum c-cellulose aqueous tov coexists nrog calcium, magnesium thiab ntsev, nws yuav tsis tsim los nag, tab sis yuav txo tau cov viscosity ntawm c-cellulose aqueous kua.

8. Yog hais tias tej yam kev mob tso cai, ncaj qha mus kuaj lub viscosity ntawm aqueous tov ntawm cellulose ether thiab sib piv cov dej tuav tus nqi ntawm cov ntsiab lus uas tsis muaj cellulose ether mortar.

Raws li tus kws tshaj lij cellulose ether chaw tsim khoom, Youngcel cellulose yuav ua siab ntev muab cov neeg siv khoom nrog cov khoom zoo tshaj plaws thiab kev pabcuam