Kev tu txoj kev rau tsau nitrogen flask

Kev tu txoj kev rau tsau nitrogen flask
Cov nitrogen txhim kho flask ua lub luag haujlwm tseem ceeb hauv kev sim ntawm nitrogen txhim kho. Thaum tu, nws yog ib qho tsim nyog los xyuas kom meej tias nws yog huv thiab tsis cuam tshuam rau kev sim tom ntej. Raws li cov ntaub ntawv tu cov nitrogen txhim kho cov cuab yeej siv hluav taws xob thiab cov chaw tsheb nqaj hlau tu, cov hau kev ntxuav hauv qab no tuaj yeem siv rau kev siv:

Ua ntej Flushing
Tom qab sim ua tiav, cov kev daws teeb meem ntxiv nyob rau hauv lub nitrogen flask yuav tsum tau tam sim ntawd tau nchuav tawm, thiab tom qab ntawd yaug nrog kais dej kom tshem tawm feem ntau cov khoom seem. Qhov no tuaj yeem tiv thaiv cov tshuaj uas muaj cov seem los ntawm kom qhuav thiab ua rau nws nyuaj los ntxuav, thaum tseem txo qis kev nyuaj ntawm kev tu tom ntej.

Hom phiaj ua
Organic cuam tshuam cov teeb meem
Thaum lub sij hawm distillation cov txheej txheem, qee cov organic muaj feem yuav ua rau distilled tawm ib txhij nrog ammonia, uas tuaj yeem cuam tshuam nrog kev ntsuas. Qee yam tshuaj, xws li formaldehyde, tuaj yeem raug tshem tawm ntawm boiling nyob rau hauv acidic tej yam kev mob (Ph<1). An appropriate amount of acidic solution (such as dilute hydrochloric acid) can be added to the nitrogen flask, and then boiled to remove possible organic interference. But attention should be paid to controlling the boiling time and temperature to avoid damage to the flask.

Stubborn av tshuaj kho
Yog tias muaj stubborn av hauv nitrogen flask, koj tuaj yeem xa mus rau txoj kev tu ntawm cov tshuaj nitrogen thiab siv 20% glacial acetic acid rau kev kho mob. Txhaj qhov tsim nyog ntawm 20% acetic acetic acid mus rau hauv lub ntuj nitrogen rau lub sijhawm kom muaj zog ntawm cov av), thiab tom qab ntawd muab nchuav tawm lub glacial acetic acid. Cov qauv no siv cov tshuaj lom neeg ntawm glacial acetic acid kom yaj thiab tshem tawm stubborn av.

Cov Kauj Ruam Ntxuav
Ntxiv cov kua rau kev ntxuav
Ntxiv 350ml ntawm dej rau cov pas dej khov kho thiab ob peb khob hlaws kom tiv thaiv cov kua los ntawm npau npau. Tom qab teeb tsa qhov ntsuas, ua haujlwm distillation distillation thiab sau tsawg kawg 100ml dej. Iav hlaws ua si tuaj yeem ua cov kua mis npau npau thaum lub sijhawm ua cua sov, zam kev ua kom nruj ntawm cov kua roj cua thiab ua kom muaj kev nyab xeeb thiab ruaj khov ntawm cov txheej txheem distillation.

Rov Ua Tu Dua
Pov tseg cov distillate thiab seem kua hauv lub dav hlau, uas tuaj yeem tshem cov impurities thiab cov khoom seem los ntawm lub hwj ntoo. Yog tias cov nyhuv tu tsis txaus siab, cov theem saum toj no ntawm kev ntxiv cov kua rau kev ntxuav tuaj kom txog thaum lub raj tawg tuaj yeem ntxuav kom huv si. Ntau yam kev tu tuaj yeem ua kom ntseeg tau tias kev tawm tsam sab hauv lub hwj tawg yog tshem tawm tag nrho cov kev sim ntawm kev sim ua kom raug
Kev tu zaum kawg thiab ziab
Yaug nrog dej huv
Yaug cov nitrogen flask ntau zaus nrog dej huv, feem ntau {{{}} lub sij hawm ntxuav cov neeg sawv cev thiab tsis huv. Thaum txhua yaug, ua kom pom tseeb tias cov dej ntshiab tuaj yeem tiv tauj txhua feem ntawm lub khob hluav taws xob, suav nrog lub qhov ncauj, phab ntsa, thiab hauv qab. Thaum lub sij hawm rinsing txheej txheem, maj mam muab cov nplawm taw tso kom cia dej kom huv sab hauv.

Txheej txheem kom qhuav
Invert cov flased nitrogen flask thiab cia nws huab cua qhuav lawm. Cov cua cua cua kom qhuav kuj tseem siv tau, tab sis qhov kub ntawm huab cua kub tau los ntawm 40 degree thiab tiv thaiv kev puas tsuaj rau lub hwj chim vim qhov kub kub. Cov raj nplaim dej qhuav yuav tsum muab khaws cia rau hauv qhov chaw qhuav thiab muaj ventilated rau kev siv yav tom ntej.