xov xwm

Thaum kub hnyiab, cov inorganic impurities nyob rau hauv cov qauv no kuj ruaj khov (xws li sodium chloride, poov tshuaj chloride, sodium sulfate, thiab lwm yam), yog hais tias tsis yog vim hlawv thiab evaporation, txoj kev no yuav siv tau los txiav txim cov tshauv nyob rau hauv cov qauv.

[Txoj Kev Txiav Txim] Muab lub hau npog ceramic (los yog npib tsib xee crucible) rau ntawm lub qhov cub hluav taws xob kub kub (piv txwv li, qhov cub hluav taws xob) lossis cov nplaim hluav taws xob, hlawv mus rau qhov hnyav li ntawm kwv yees li (kwv yees li 1 teev), txav mus rau calcium chloride drier. thiab txias rau chav tsev kub. Lub hau crucible ces tau hnyav ua ke ntawm qhov kev ntsuas ntsuas thiab teem rau G1 g.

Nyob rau hauv uas twb hnyav crucible, coj tus qauv tsim nyog (nyob ntawm seb cov tshauv nyob rau hauv cov qauv, feem ntau hu ua 2-3 grams), hais rau 0.0002 grams, lub crucible lub qhov ncauj hais txog peb lub hlis twg, nrog tsawg hluav taws kub maj mam crucible, ua tus qauv maj carbonization. , tom qab lub crucible nyob rau hauv hluav taws xob rauv (los yog cov pa roj), tsis tsawg tshaj li 800℃hlawv kom kwv yees qhov hnyav tas li (kwv yees li 3 teev), hloov mus rau calcium chloride drier, txias rau chav sov, hnyav. Nws yog qhov zoo tshaj plaws los hlawv tom qab 2 teev, txias, hnyav, thiab tom qab ntawd hlawv rau 1 teev, ces txias, hnyav, xws li ob qho kev hnyav zuj zus, qhov hnyav yuav luag tsis hloov, ces txhais tau hais tias tau hlawv tag, yog tias qhov hnyav txo. tom qab qhov thib ob hlawv, ces yuav tsum yog qhov thib peb hlawv, hlawv kom zoo ib yam li qhov hnyav tas li, teem G grams.

(G-G1) / qauv hnyav x100 = grey%

[Ceeb Toom] - Cov qauv loj tuaj yeem txiav txim siab raws li tus nqi ntawm cov hmoov tshauv hauv cov qauv, cov qauv tshauv tsawg dua, tuaj yeem hu ua kwv yees li 5 grams ntawm cov qauv, ntau cov hmoov tshauv tuaj yeem hu ua kwv yees li 2 grams ntawm cov qauv.

2. Lub sijhawm ntawm kev hlawv yog nyob ntawm qhov hnyav ntawm tus qauv, tab sis qhov kub kub zoo ib yam li qhov hnyav tas li.

3. Qhov sib txawv ntawm qhov hnyav uas kub hnyiab tau ob zaug tau zoo dua nyob rau hauv 0.3 mg hauv qab no, qhov siab tshaj qhov sib txawv tsis tuaj yeem tshaj 1 mg, suav nrog kwv yees li qhov hnyav tas li uas yog.