Ndi chidziwitso chiti chomwe chiyenera kuphunzitsidwa mukamagwiritsa ntchito mita ya conductivity?Choyamba, pofuna kupewa electrode polarization, mita imapanga chizindikiro chokhazikika cha sine wave ndikuchiyika pa electrode.Zomwe zikuyenda mu electrode zimayenderana ndi kusinthasintha kwa njira yoyezera.Pambuyo pa mita kutembenuza zamakono kuchokera ku amplifier yogwira ntchito yapamwamba kwambiri kukhala chizindikiro chamagetsi, Pambuyo pa kukulitsa chizindikiro choyendetsedwa ndi pulogalamu, kuzindikira ndi kusefa kwa gawo, chizindikiro chomwe chikhoza kuwonetsa conductivity chimapezeka;microprocessor imasintha kudzera pa switch kuti iwonetsere chizindikiro cha kutentha ndi chizindikiro cha conductivity.Pambuyo powerengera ndi kubwezera kutentha, njira yoyezera imapezeka pa 25 ° C.Mtengo wa conductivity panthawiyo ndi mtengo wa kutentha panthawiyo.
Munda wamagetsi womwe umapangitsa kuti ma ion asunthike munjira yoyezera amapangidwa ndi ma electrode awiri omwe amalumikizana mwachindunji ndi yankho.Ma elekitirodi oyezera awiriwa ayenera kupangidwa ndi zinthu zosamva mankhwala.Pochita, zinthu monga titaniyamu zimagwiritsidwa ntchito nthawi zambiri.Elekitirodi yoyezera yopangidwa ndi maelekitirodi awiri amatchedwa electrode ya Kohlrausch.
Muyeso wa conductivity uyenera kufotokozera mbali ziwiri.Mmodzi ndi makonzedwe a yankho, ndipo winayo ndi ubale wa geometric wa 1/A mu yankho.The conductivity angapezeke poyeza panopa ndi voteji.Muyezo uwu umagwiritsidwa ntchito pazida zamakono zoyezera mawonedwe achindunji.
ndi K=L/A
A——Mbale wogwira mtima wa electrode yoyezera
L—— Mtunda pakati pa mbale ziwirizi
Mtengo wa izi umatchedwa cell constant.Pamaso pa yunifolomu yamagetsi yamagetsi pakati pa ma electrode, nthawi zonse electrode imatha kuwerengedwa ndi miyeso ya geometric.Pamene mbale ziwiri zazikulu zokhala ndi dera la 1cm2 zimasiyanitsidwa ndi 1cm kuti apange electrode, chokhazikika cha electrode iyi ndi K = 1cm-1.Ngati madulidwe mtengo G = 1000μS kuyeza ndi peyala ya maelekitirodi, ndiye madutsidwe wa njira anayesedwa K=1000μS/cm.
Nthawi zambiri, electrode nthawi zambiri imapanga gawo lamagetsi lopanda yunifolomu.Panthawi imeneyi, kukhazikika kwa selo kumayenera kutsimikiziridwa ndi njira yokhazikika.Mayankho okhazikika nthawi zambiri amagwiritsa ntchito njira ya KCl.Ichi ndi chifukwa madulidwe a KCl ndi okhazikika komanso olondola pansi pa kutentha kosiyana ndi ndende.Mayendedwe a 0.1mol/l KCl yankho pa 25°C ndi 12.88mS/CM.
Zomwe zimatchedwa kuti zopanda yunifolomu zamagetsi zamagetsi (zomwe zimatchedwanso malo osokera, malo otayira) alibe nthawi zonse, koma amagwirizana ndi mtundu ndi ndende ya ayoni.Chifukwa chake, ma elekitirodi am'munda wosokera ndiye ma elekitirodi oyipa kwambiri, ndipo sangathe kukwaniritsa zosowa zamitundu yonse yoyezera kudzera pakusintha kumodzi.
2. Kodi malo ogwiritsira ntchito mita ya conductivity ndi chiyani?
Minda yogwiritsidwa ntchito: Itha kugwiritsidwa ntchito kwambiri pakuwunika kosalekeza kwa madulidwe am'machitidwe monga mphamvu zotentha, feteleza wamankhwala, zitsulo, kuteteza chilengedwe, mankhwala, biochemicals, chakudya ndi madzi apampopi.
3.Kodi mawonekedwe a cell a conductivity mita ndi chiyani?
"Malinga ndi kalembedwe ka K=S/G, selo lokhazikika la K likhoza kupezeka poyesa ma conduction G a electrode conductivity mumsakatuli wina wa KCL solution.Panthawiyi, ma conductivity S a yankho la KCL amadziwika.
Ma electrode okhazikika a sensa conductivity amafotokoza bwino za geometric za ma electrode awiri a sensor.Ndilo chiŵerengero cha kutalika kwa chitsanzo m'dera lovuta pakati pa ma electrode a 2.Zimakhudza mwachindunji kukhudzidwa ndi kulondola kwa muyeso.Muyeso wa zitsanzo ndi otsika madutsidwe amafuna otsika selo zokhazikika.Kuyeza kwa zitsanzo zokhala ndi madulidwe apamwamba kumafuna ma cell okhazikika.Chida choyezera chimayenera kudziwa kuchuluka kwa cell ya cholumikizira cholumikizira ndikusintha zowerengera molingana.
4. Kodi ma cell okhazikika a conductivity mita ndi chiyani?
Ma elekitirodi a ma electrode conductivity awiri ndi omwe amagwiritsidwa ntchito kwambiri pamagetsi amagetsi ku China.Kapangidwe ka experimental ma elekitirodi awiri electrode madutsidwe elekitirodi ndi sinter mapepala awiri platinamu pa mapepala awiri ofanana galasi kapena khoma lamkati la chubu galasi wozungulira kusintha platinamu pepala Area ndi mtunda akhoza kupangidwa ma elekitirodi conductivity ndi makhalidwe osiyana nthawi zonse.Nthawi zambiri pamakhala K=1, K=5,K=10 ndi mitundu ina.
Mfundo ya conductivity mita ndi yofunika kwambiri.Posankha mankhwala, muyenera kusankha wopanga wabwino.
Nthawi yotumiza: Dec-15-2021