Luluphi ulwazi olusisiseko olufanele luphathwe ngexesha lokusetyenziswa kwemitha yokuqhuba?Okokuqala, ukuze ugweme i-electrode polarization, imitha ivelisa isignali ye-sine ezinzileyo kwaye iyisebenzise kwi-electrode.Ikhoyo ngoku ehamba nge-electrode ihambelana nokuqhutyelwa kwesisombululo esilinganisiweyo.Emva kokuba imitha iguqule i-current kwi-high-impedance amplifier yokusebenza kwisignali ye-voltage, Emva kokulungiswa kwesignali elawulwa yiprogram, ukubonwa kwesigaba-sensitive kunye nokucoca, umqondiso onokuthi ubonise ukuhanjiswa kufunyenwe;i-microprocessor itshintsha ngokutshintshela kwisampulu enye yesignali yeqondo lokushisa kunye nesignali ye-conductivity.Emva kokubala kunye nembuyekezo yeqondo lokushisa, isisombululo esilinganisiweyo sifunyenwe kwi-25 ° C.Ixabiso le-conductivity ngexesha kunye nexabiso lobushushu ngelo xesha.
Intsimi yombane eyenza ukuba i-ion ihambe kwisisombululo esilinganisiweyo iveliswa ngama-electrode amabini adibana ngqo nesisombululo.Izibini zokulinganisa i-electrode kufuneka zenziwe ngezinto ezixhathisa iikhemikhali.Enyanisweni, izixhobo ezifana ne-titanium zihlala zisetyenziswa.I-electrode yokulinganisa eyenziwe ngee-electrode ezimbini ibizwa ngokuba yiKohlrausch electrode.
Umlinganiselo wokuqhuba kufuneka ucacise iinkalo ezimbini.Enye yi-conductivity yesisombululo, kwaye enye i-geometric relationship ye-1 / A kwisisombululo.I-conductivity inokufumaneka ngokulinganisa okwangoku kunye ne-voltage.Lo mgaqo wokulinganisa usetyenziswa kwizixhobo zanamhlanje zokulinganisa ngokuthe ngqo.
Kwaye K=L/A
A——Ipleyiti esebenzayo ye-electrode yokulinganisa
L——Umgama phakathi kwamacwecwe amabini
Ixabiso loku kubizwa ngokuba yiseli engaguqukiyo.Ubukho bentsimi yombane efanayo phakathi kwe-electrode, i-electrode rhoqo ingabalwa ngemilinganiselo yejometri.Xa iipleyiti ezimbini zesikwere ezinommandla we-1cm2 zihlulwe nge-1cm ukwenza i-electrode, i-electrode ye-electrode yi-K = 1cm-1.Ukuba ixabiso le-conductivity G = 1000μS lilinganiswe nale sibini se-electrode, ngoko ukuqhuba kwesisombululo esivavanyiweyo K = 1000μS / cm.
Phantsi kweemeko eziqhelekileyo, i-electrode idla ngokwenza i-partial non-uniform electric field.Ngeli xesha, i-cell constant kufuneka inqunywe ngesisombululo esiqhelekileyo.Izisombululo eziqhelekileyo zisebenzisa isisombululo se-KCl.Oku kungenxa yokuba conductivity ye KCl izinzile kakhulu kwaye ichanekile phantsi kwamaqondo obushushu ezahlukeneyo kunye noxinaniso.I-conductivity ye-0.1mol / l isisombululo se-KCl kwi-25 ° C yi-12.88mS / CM.
Into ebizwa ngokuba yi-non-uniform electric field (ekwabizwa ngokuba yintsimi elahlekileyo, intsimi yokuvuza) ayinayo into eqhubekayo, kodwa ihambelana nohlobo kunye noxinzelelo lwee-ion.Ngoko ke, i-electrode ecocekileyo yentsimi yi-electrode embi kakhulu, kwaye ayikwazi ukuhlangabezana neemfuno zoluhlu olubanzi lokulinganisa ngokulinganisa omnye.
2. Ithini intsimi yesicelo semitha ye-conductivity?
Imimandla esebenzayo: Ingasetyenziswa ngokubanzi ekubekeni iliso rhoqo kumaxabiso e-conductivity kwizisombululo ezifana namandla ashushu, izichumisi zekhemikhali, i-metallurgy, ukhuseleko lokusingqongileyo, amayeza, iikhemikhali zebhayoloji, ukutya kunye namanzi etephu.
3.Yintoni iseli engaguqukiyo yemitha yokuqhuba?
“Ngokutsho kwefomula K=S/G, iseli engaguqukiyo i-K inokufumaneka ngokulinganisa i-conductance G ye-electrode conductivity kuxinzelelo oluthile lwesisombululo se-KCL.Ngeli xesha, i-conductivity S yesisombululo se-KCL iyaziwa.
I-electrode rhoqo ye-conductivity sensor ichaza ngokuchanekileyo iimpawu zejometri ze-electrodes ezimbini zenzwa.Ingumlinganiselo wobude besampuli kwindawo ebalulekileyo phakathi kwe-electrode ye-2.Ichaphazela ngokuthe ngqo uvakalelo kunye nokuchaneka komlinganiselo.Umlinganiselo weesampulu ezine-conductivity ephantsi zifuna ukuguquguquka kweeseli eziphantsi.Umlinganiselo weesampulu ezine-conductivity ephezulu zifuna ukuguquguquka kweeseli eziphezulu.Isixhobo sokulinganisa kufuneka sazi i-cell constant ye-conductivity sensor edibeneyo kwaye ulungelelanise iinkcukacha zokufunda ngokufanelekileyo.
4. Ziziphi iiseli ezingaguqukiyo zemitha ye-conductivity?
I-electrode conductivity electrode ene-electrode esetyenziswa ngoku yolona hlobo lusetyenziswa kakhulu lwe-electrode conductivity e-China.Ubume bomfuniselo we-electrode conductivity electrode kukwenza amacwecwe amabini eplatinam kumaphepha amabini eglasi ahambelanayo okanye udonga lwangaphakathi lwetyhubhu yeglasi engqukuva ukulungelelanisa iphepha leplatinam Indawo kunye nomgama ungenziwa kwi-electrode conductivity kunye namaxabiso ahlukeneyo ahlukeneyo.Ngesiqhelo kukho K=1, K=5, K=10 kunye nezinye iindidi.
Umgaqo wemitha ye-conductivity ubaluleke kakhulu.Xa ukhetha imveliso, kufuneka ukhethe umenzi olungileyo.
Ixesha lokuposa: Dec-15-2021