Tianti Cellulose Company Specialitas in investigationis, progressionem, productio et Sales promotionem hydroxypropyl Methyl Cellulose HPMC products. Puritas HPMC hydroxypropyl METHYL Cellulose est maxime de productum topic ad manufacturers et users. Hic nos hydroxypropyl methyl Cellulose manufacturers ad detailed introduction, spero legere ad auxilium.
Determinatio puritatis HPMC hydroxypropyl methyl Cellulose
Principium
Hydroxypropyl methyl Cellulose HPMC est insolubilis in LXXX% ethanol. Post Dissolving et baptismata pro multis temporibus, LXXX% Ethanol dissolvi in sample separata et remota ad obtinendum purissimum hydroxypropyl methyl Cellulose HPMC.
REagent
Nisi aliter dicta, tantum reagentia confirmavit esse analytica pura et distillans aut deionized aquae vel aquae similitudines puritas in analysis.
XCV% Ethanol (GB / T DCLXXIX).
Ethanol, LXXX% solutio, dilute XCV% Ethanol (E.2.1) 840ml cum aqua ad 1l.
BMI (GB / T (XII) DXCI).
Instrumentum
Communis officinarum instrumenta
Magna calefacit Suscitant, agitare virga longitudinem de 3.5cm.
Filtration Crucible, 40ml, 4.5μm ~ 9μm.
Speculum superficiem catino, φ10cm, media foraminis.
Beaker, 400ml.
Temperatus aqua balneum.
Clibano potest control temperatus ad CV ℃ ± II ℃.
Progressio
Certe ponderare sample 3G (accurate ad 0,001g) in assidue pondus pœnitet, addere 150ml LXXX% ethanol in LX ℃ ~ LXV ℃, pone in superficiem ad LXV ℃ ℃ ~ et ad adjust in aegre ad LXV ℃ ℃ ℃. Surgentes X min.
Nolite turbantes, loco compensatur in constans temperatus aqua balneum LX ℃ ~ LXV ℃, stet usque ad habitatores insolubilis materia et effundam supernatanti liquor ut omnino in constant pondus looktratration ut omnino in constant pondus looktratration ut totaliter in constant pondus looktratration ut totaliter in constant pondus looktratration ut totaliter in constant pondus looktratration ut totaliter in constant pondus liquatur ut totaliter in constant pondus foveant liquid ut omnino in constant pondus looktratration ut omnino in constanti pondus foveant fluidam ut omnino in constant pondus foveant liquidum ut omnino in constant pondus looktratration ut totaliter in constant pondus foveant liquid.
Add 150mL 80% ethanol at 60℃ ~ 65℃ to the beaker, repeat the above stirring and filtering operations, and then wash the beaker, surface dish, stirring rod and thermometer carefully with 80% ethanol at 60℃ ~ 65℃, so that the insoluble matter is completely transferred to the crucible, and further wash the contents of the crucible. Succione debet esse in hac operatione et siccatio in crustulam sit vitandum. Si particulas pertransit filter, suctu esse tardi.
Note: Non debet esse sodium chloride in sample omnino abluit a LXXX% ethanol. Si necesse, 0.1Mol / l Silver nitrate solutio et 6Mol / l nitric acidum potest esse ad reprehendo an filtrate continet chloride ions.
In cubiculum temperatus, in contentis in latuit alterum cum XCV% ethanol ad 50ml, et tandem cum ethyl Mi20ml ad secundarium lavare. Foream tempus ne nimis. Crucible positus in compensatur et calefacta in vapore balneum donec nonhyl mi odor inventa.
Note: lavare cum ethyl mi necesse est omnino removere ethanol ex insolubilis substantia. Sin Ethanol non est omnino remota ante clibano siccatio, completum remotionem non potest in clibano siccatio.
Crucible et compensata in clibano CV ℃ ± II ℃ ad siccatio 2h, deinde transfertur ad dryer ad refrigerationem ad 30min et appendi, et siccavit 1h et appendit ad refrigerationem usque ad massa mutatio non plus quam 0.003g. Si massa crescat per 1h siccatio, infima servata Missam praevalebunt.
Et results ratione
Puritas HPMC hydroxypropyl METHYL cellulosis est ratione ut missa fraction P et valorem expressa est%
M1 - Missam ex exaruit insolubilis materia, in P. (g);
M0 - Missa de test component, in P. g (g);
W0 - humorem et volatile contentus de sample,%.
In arithmetica intelliguntur valorem de duabus parallel mensuras superiores reducitur ad unum decimales punctum ut mensurae effectus.
Precision
In absoluta differentia inter duo independens mensuras sub repeatability conditionibus non maius quam 0,3%, provisum est maior quam 0.3% non excedat V%.
Post tempus: Feb, 14-2022