Txoj kev Clark feem ntau yog siv rau hauv kev tsim khoom lossis kev tshawb fawb tshawb fawb los ntsuas qhov concentration ntawm cov pa oxygen hauv dej lossis kev daws teeb meem. Vim hais tias txoj kev no ncaj qha hloov cov tshuaj ntsuam xyuas rau hauv lub teeb liab hluav taws xob, nws muaj cov lus teb rau kev ntsuam xyuas rhiab thiab ua kom yooj yim rau kev soj ntsuam online, ua rau nws siv tau dav. Nyob ntawm cov khoom siv anode thiab electrolyte siv, Clark txoj kev tau muab faib ua electrochemical polarography thiab Gavanic nyias- zaj duab xis tam sim no tsom xam.
Hauv polarography, cathode rau kev txiav txim siab yaj oxygen hauv dej yog kub lossis platinum electrode, thiab anode yog nyiaj electrode (Ag / AgCl siv electrode). Cov electrolyte yog KCl tov, thiab DC fais fab mov voltage yog 0.65-0.85 V. Thaum cov khoom siv anode hloov mus rau txhuas thiab cov electrolyte rau KOH tov, nws dhau los ua Gavanic txoj kev. Piv rau polarography, Gavanic txoj kev muab kev nyeem ntawv nrawm dua vim tias cov tshuaj tiv thaiv oxidation sai dua ntawm cov hlau lead ntawm cov anode, thiab nws tsis tas yuav polarization. Nws yog feem ntau siv rau kev soj ntsuam hauv chav kuaj, tab sis nquag tu yog tsim nyog. Polarography, ntawm qhov tod tes, yuav tsum tau polarization ua ntej siv tab sis tsis tas yuav tsum tau saib xyuas tas li, ua rau nws tsim nyog rau kev soj ntsuam online txuas ntxiv.
