Tsanangudzo ye ph mita
A pH metre inoreva chiridzwa chinoshandiswa kuona pH kukosha kwemushonga.Iyo pH mita inoshanda pamusimboti wegalvanic bhatiri.Simba re electromotive pakati pema electrode maviri ebhatiri yegalvanic inobva pamutemo weNerns, iyo isingabatanidzi chete nehupfumi hwemagetsi, asiwo ine chokuita nekugadzirisa kwehydrogen ions mumhinduro.Pane hukama hunofambirana pakati pesimba re electromotive rebhatiri rekutanga neiyo hydrogen ion concentration, uye negative logarithm yehydrogen ion concentration ndiyo pH value.Iyo pH mita chinhu chakajairika chekuongorora chiridzwa, chinoshandiswa zvakanyanya mukurima, kuchengetedza kwezvakatipoteredza uye indasitiri.Ivhu pH ndechimwe chezvinhu zvakakosha zvevhu.Zvinhu zvakadai setembiricha uye ionic simba remhinduro yekuongororwa inofanirwa kutariswa panguva yekuyera pH.
Nheyo ye ph mita
pH inotsanangurwa seyakashata logarithm yehydrogen ion concentration mune aqueous solution.Kunyangwe izvi zvichinzwika zvakaoma, mumashoko akareruka, pH inhamba inoshandiswa kuyera acidity kana alkalinity yemhinduro.Nhamba inotaridza huwandu hwemaioni ehydrogen anogona kuburitswa nechimwe chinhu mumushonga.Muchikamu chepH, pH ye7 inoonekwa seyakarerekera.Mishonga ine pH ye0-7 inonzi ine acidic, uye mhinduro dziri pamusoro pe7 kusvika 14 dzinonzi alkaline solutions.Mune biological system, pH yakakosha.Nekuda kweiyo yakanyatso kugadziridzwa pH, mazhinji ebiomolecules mumuviri wedu anogona kuita mabasa akanaka.Kunyangwe muchirongwa chekuyedza, iyo pH inodiwa inofanirwa kuchengetedzwa kuti iwane mhedzisiro chaiyo.Naizvozvo, mukuyedza kwebiology, mudziyo unonzi pH meter unoshandiswa kunyatso tarisa pH.
Iyo pH mita ndeye pH-inopindura electrode inoyera kuita kwehydrogen ion mumhinduro uye inotumira ruzivo urwu.Chigadzirwa chacho chine machubhu maviri egirazi, rimwe nerimwe rine electrode, referensi electrode uye sensor electrode.Iyo referensi electrode inogadzirwa neyakaguta KCl mhinduro, nepo sensor electrode ine buffer mhinduro ine pH ye7, uye waya yesirivha yakavharwa nesirivheri chloride inonyudzwa mumhinduro mbiri idzi.Pakupera kwe sensor electrode igirobhu rakagadzirwa negirazi rinoputika rakaputirwa nesilika uye simbi munyu.
Kuyera pH yemhinduro, iyo pH mita inonyudzwa mumhinduro.Mushure mekunge girobhu reiyo sensor electrode rabata mhinduro, maion ehydrogen mumushonga anotsiva maion esimbi pagirobhu.Kutsiviwa kwesimbi uku kunokonzera kuti ikozvino iyerere muwaya yesimbi, inoverengwa nevoltmeter.
Iyo pH mita ndeimwe yemidziyo inoshandiswa zvakanyanya mumarabhoritari ezvinyorwa.Gara uchiongorora iyo pH yemabuffers, mhinduro uye reagents kuti uone kuti mamiriro ekuyedza ari echokwadi.Kuti uve nechokwadi chekuverenga kwakaringana, zvishandiso zvinofanirwa kugadzikiswa nguva nenguva.
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Nguva yekutumira: Zvita-15-2021