Qhov sib txawv tseem ceeb ntawm polarography thiab voltammetry yog qhov polarography yog hom voltammetry uas siv cov kua hlau electrode whereas voltammetry yog cov txheej txheem tshuaj ntsuam xyuas uas muaj peev xwm sib txawv tsis tu ncua thaum saib xyuas tam sim no.
Voltammetry yog ib txoj hauv kev electroanalytical uas muaj cov ntawv thov hauv kev tshuaj ntsuam chemistry thiab hauv ntau cov txheej txheem kev lag luam. Polarography yog ib hom voltammetry.
Polarography yog dab tsi?
Polarography yog ib hom voltammetry uas ua haujlwm electrode yog cov kua hlau. Hauv lwm lo lus, cov khoom siv hluav taws xob ua haujlwm hauv polarography yog poob mercury electrode (DME) los yog static mercury drop electrode. Cov electrodes no muaj txiaj ntsig zoo rau lawv qhov dav cathodic ntau yam thiab qhov chaw txuas ntxiv. Polarography tau tsim nyob rau hauv 1922 los ntawm ib tug kws tshuaj hu ua Jaroslav Heyrovsky. Nws kuj tau txais Nobel nqi zog rau qhov kev tsim kho no xyoo 1959.
Daim duab 01: Ib qho qub Polarography
Ntxiv mus, qhov ntsuas hauv polarography yog cov lus teb uas tsuas yog txiav txim siab los ntawm kev thauj khoom loj. Polarography tsuas yog kawm txog kev daws teeb meem ntawm cov txheej txheem electrode los ntawm kev siv electrolysis siv ob lub electrodes. Ib qho ntawm cov electrodes yog polarizable thaum lwm yam electrode yog unpolarizable. Lub polarizable electrode yog mercury electrode poob.
qeb uas cov polarography ntog yog cov qeb dav dav ntawm linear-sweep voltammetry nyob rau hauv uas cov electrode muaj peev xwm hloov pauv nyob rau hauv ib txoj kab ncaj nraim los ntawm qhov pib muaj peev xwm mus rau qhov kawg peev xwm. Vim muaj cov nyhuv ntawm txoj kev cheb linear uas tswj tau los ntawm kev thauj khoom loj, kev sim polarographic muaj cov duab sigmoidal.
Voltammetry yog dab tsi?
Voltammetry yog ib qho kev tshuaj ntsuam xyuas uas cov khoom ntawm tus ntsuas ntsuas tau txiav txim los ntawm kev ntsuas qhov tam sim no raws li qhov muaj peev xwm sib txawv. Nws yog ib qho tseem ceeb hauv analytical chemistry thiab hauv ntau cov txheej txheem kev lag luam.
Nyob rau hauv voltammetry, peb soj ntsuam ib nrab-cell reactivity ntawm ib tug analyte. Ntxiv mus, nws yog kev kawm txog tam sim no raws li kev ua haujlwm ntawm kev siv peev xwm. Qhov nkhaus uas peb tau txais los ntawm voltammetric tsom xam yog hu ua voltammogram. Nws qhia qhov txawv ntawm qhov muaj peev xwm nrog lub sijhawm. Ntawm no, lub peev xwm sib txawv arbitrarily yog ib kauj ruam los ntawm kauj ruam los yog raws li ib tug tas mus li txheej txheem. Thiab, peb tuaj yeem ntsuas tus nqi tam sim no raws li qhov sib txawv ntawm qhov sib txawv. Tsis tas li ntawd, cov txheej txheem rov qab rau voltammetry yog amperometry.
Daim duab 02: Ib qho piv txwv ntawm Voltammogram
Txhawm rau ua qhov kev sim hauv voltammetry, peb xav tau tsawg kawg ob lub electrodes. Ntawm ob, ib qho electrode hu ua cov electrode ua haujlwm. Nws ua rau kev sib cuag nrog tus kws tshuaj ntsuam xyuas. Lub tshuab electrode ua haujlwm yuav tsum siv lub peev xwm xav tau hauv kev tswj xyuas kom yooj yim rau kev hloov pauv ntawm tus nqi mus rau thiab los ntawm cov tshuaj ntsuam xyuas. Qhov thib ob electrode, ntawm qhov tod tes, yuav tsum muaj lub peev xwm paub uas tuaj yeem ntsuas lub peev xwm ntawm cov electrode ua haujlwm.
Qhov txawv ntawm Polarography thiab Voltammetry yog dab tsi?
Qhov sib txawv tseem ceeb ntawm polarography thiab voltammetry yog qhov polarography yog ib hom voltammetry uas siv cov kua hlau electrode whereas voltammetry yog cov txheej txheem tshuaj ntsuam xyuas uas muaj peev xwm sib txawv tsis tu ncua thaum saib xyuas tam sim no. Polarography yog subclass ntawm voltammetry.
Cov infographic hauv qab no qhia txog qhov sib txawv ntawm polarography thiab voltammetry.
Summary – Polarography vs Voltammetry
Hauv luv luv, lub polarography yog subclass ntawm voltammetry. Qhov sib txawv tseem ceeb ntawm polarography thiab voltammetry yog qhov polarography yog ib hom voltammetry uas siv cov kua hlau electrode whereas voltammetry yog cov txheej txheem analytical uas muaj peev xwm sib txawv tsis tu ncua thaum saib xyuas tam sim no.
