Raws li lub hauv paus ntsiab lus ntawm kev txiav txim siab Kjeldahl nitrogen, peb kauj ruam yuav tsum tau txiav txim siab, xws li kev zom, distillation thiab titration.
Kev zom: Thaum tshav kub kub nitrogen-muaj cov organic tebchaw (cov protein) ua ke nrog cov concentrated sulfuric acid thiab catalysts (tooj liab sulfate lossis Kjeldahl digestion ntsiav tshuaj) kom decompose cov protein. Cov pa roj carbon thiab hydrogen yog oxidized rau hauv carbon dioxide thiab dej kom dim, thaum cov organic Nitrogen hloov mus rau ammonia (NH3) thiab ua ke nrog sulfuric acid los ua ammonium sulfate. (Ammonium NH4 +)
Cov txheej txheem kev zom zaub mov: cua sov nrog cov cua kub kom npau npau, cov khoom hauv lub khob yog carbonized thiab blackened, thiab ua npuas ncauj ntau. Tom qab cov npuas dej ploj lawm, ua kom cov hluav taws kub hnyiab kom muaj zog me ntsis. Thaum cov kua yuav xiav-ntsuab thiab ntshiab, txuas ntxiv rau cua sov rau 05-1h, thiab txias tom qab kawg. (Koj tuaj yeem siv cov cuab yeej digestion tsis siv neeg los ua kom tiav cov haujlwm ua ntej)
Distillation: Cov tshuaj tau yog diluted mus rau qhov ntim tas li thiab tom qab ntawd ntxiv nrog NaOH kom tso NH3 los ntawm distillation. Tom qab condensation, nws yog sau nyob rau hauv ib tug daws ntawm boric acid.
Cov txheej txheem Distillation: Ua ntej, cov qauv digested yog diluted, NaOH ntxiv, thiab cov roj ammonia tsim tom qab cua sov nkag mus rau hauv lub condenser, thiab ntws mus rau hauv lub raj mis uas muaj cov tshuaj boric acid tom qab condensed. Cov ntaub ntawv ammonium borate. (Ib qho ntsuas sib xyaw yog ntxiv rau cov tshuaj boric acid. Tom qab ammonium borate tsim, cov tshuaj absorbing hloov ntawm acidic mus rau alkaline, thiab cov xim hloov ntawm ntshav mus rau xiav-ntsuab.)
Titration: Titrate nrog hydrochloric acid tus qauv kev daws teeb meem ntawm kev paub txog cov ntsiab lus, suav cov ntsiab lus nitrogen raws li tus nqi ntawm hydrochloric acid noj, thiab tom qab ntawd muab nws los ntawm qhov sib hloov pauv kom tau txais cov ntsiab lus protein. (Titration yog hais txog ib txoj kev ntawm kev soj ntsuam kom muaj nuj nqis thiab tseem muaj kev sim tshuaj lom neeg. Nws siv cov tshuaj tiv thaiv ntau ntawm ob txoj kev daws teeb meem los txiav txim siab cov ntsiab lus ntawm ib qho kev daws teeb meem. thiab tom qab ntawd visually soj ntsuam qhov noj ntawm tus txheej txheem daws Volume, xam thiab tsom xam.)
Titration txheej txheem: Muab cov txheej txheem daws teeb meem ntawm hydrochloric acid rau hauv cov tshuaj ammonium borate kom hloov cov xim ntawm cov tshuaj los ntawm xiav-ntsuab mus rau lub teeb liab.
DRK-K616 tsis siv neeg Kjeldahl nitrogen analyzer yog qhov tsis siv neeg ntse ntsuas ntsuas rau kev txiav txim siab nitrogen cov ntsiab lus raws li txoj kev Kjeldahl. Nws tuaj yeem siv dav hauv kev ua zaub mov, pub khoom noj, haus luam yeeb, tsiaj txhu, av chiv, kev saib xyuas ib puag ncig, tshuaj, kev ua liaj ua teb, kev tshawb fawb, kev qhia, kev saib xyuas zoo thiab lwm yam kev tshawb fawb txog nitrogen thiab protein nyob rau hauv macro thiab semi-micro. cov qauv. Nws kuj tuaj yeem siv rau ammonium ntsev, Kev Tshawb Fawb ntawm cov roj ntsha tsis hloov pauv / alkali, thiab lwm yam. Thaum siv txoj kev Kjeldahl los txiav txim rau cov qauv, nws yuav tsum mus dhau peb txoj kev zom zaub mov, distillation, thiab titration. Distillation thiab titration yog cov txheej txheem ntsuas tseem ceeb ntawm DRK-K616 Kjeldahl nitrogen analyzer. DRK-K616 hom Kjeldahl nitrogen analyzer yog ib tug tag nrho automatic distillation thiab titration nitrogen ntsuas system tsim raws li classic Kjeldahl nitrogen kev txiav txim txoj kev; Qhov ntsuas no muab kev yooj yim zoo rau cov neeg kuaj sim hauv cov txheej txheem ntawm kev txiav txim siab nitrogen-protein. , Thiab muaj cov yam ntxwv ntawm kev siv nyab xeeb thiab txhim khu kev qha; kev ua haujlwm yooj yim thiab txuag lub sijhawm. Suav kev sib tham interface ua rau cov neeg siv yooj yim rau kev khiav lag luam, lub interface yog tus phooj ywg, thiab cov ntaub ntawv tso tawm yog nplua nuj, yog li tus neeg siv tau ceev nrooj siv cov cuab yeej.
Post lub sij hawm: Feb-25-2022
