Nhau - Ndeupi musiyano uripo pakati peelectrode yepH ye single junction ne double junction?

Maelectrode ePH akasiyana nenzira dzakasiyana-siyana; kubva pachimiro chemuromo, makutano, zvinhu uye kuzadza. Musiyano mukuru ndewekuti electrode ine makutano rimwe chete here kana maviri.

Maelectrode epH anoshanda sei?
Maelectrode e pH anosanganiswa anoshanda nekuva ne sensing half-cell (AgCl covered silver wire) uye reference half-cell (Ag/AgCl reference electrode wire), zvikamu zviviri izvi zvinofanirwa kubatanidzwa pamwe chete kuti zvipedzise circuit kuitira kuti meter iwane pH reading. Kunyange half sell inonzwa shanduko mu pH ye solution, reference half cell i reference potential yakasimba. Ma electrode anogona kuzadzwa nemvura kana gel. Liquid junction electrode inogadzira junction ine film yakatetepa ye filling solution pamucheto we probe. Anowanzova ne pombi function yekukubvumira kugadzira junction itsva yekushandisa kwese kwese. Anoda kuzadzazve nguva nenguva asi anopa kushanda kwakanakisa kuwedzera hupenyu, kururama uye kumhanya kwekupindura. Kana ikaramba iripo liquid junction ichave nehupenyu husingaperi hunoshanda. Mamwe ma electrode anoshandisa gel electrolyte isingade kuwedzerwa nemushandisi. Izvi zvinoita kuti ive sarudzo isina matambudziko asi ichaganhurira hupenyu hwe electrode kusvika pagore rimwe chete kana yakachengetwa nemazvo.

Double Junction – aya maelectrode epH ane imwe nzira yekudzivirira kusangana pakati pe electrode fill solution ne sample yako izvo zvaizokonzera kukuvara kwe electrode junction. Anofanirwa kuyedza ma sample ane mapuroteni, heavy metals kana sulphides.

Single Junction - izvi ndezvekushandisa masampuli asingavharidzire mubatanidzwa.

Nderudzii rwe pH electrode yandinofanira kushandisa?
Kana sampuro iine mapuroteni, masulphite, simbi dzinorema kana maTRIS buffers, electrolyte inogona kuita basa nesampuro yacho yogadzira solid precipitate inovhara denderedzwa remaporous eelectrode yoimisa kushanda kwayo. Ichi ndicho chimwe chezvikonzero zvinowanzoita kuti pave ne "dead electrode" yatinoona kakawanda.

Kune mienzaniso iyoyo unoda double junction - izvi zvinopa dziviriro yakawedzerwa kubva pane izvi, saka uchawana hupenyu huri nani kubva ku pH electrode.