Mashandiro anoita pH Meter
Kuyera pH chinhu chakakosha muzvikamu zvakasiyana-siyana, zvinosanganisira chemistry, biology, engineering, uye medicine. Chishandiso chinoshandiswa kuyera pH yemushonga chinonzi pH meter. Chinyorwa chino chichatsanangura zvakadzama mashandiro emuchina wepH meter, zvikamu zvawo, uye mashandisirwo awo muzvikamu zvakasiyana-siyana.
Pendauluan
pH chikero che logarithmic chinoshandiswa kuona acidity kana alkalinity yemushonga. Chikero che pH chinotangira pa 0 kusvika pa 14: pH ye7 inoonekwa seyakarerekera, pH iri pasi pe7 inoratidza mamiriro eacidic, uye pH iri pamusoro pe7 inoratidza mamiriro ealkaline. Nekuti kuyerwa kwepH kwakakosha munzvimbo dzakawanda dzesainzi nemaindasitiri, kuvapo kwe pH meter kwakakosha. pH meter chishandiso chemagetsi chinogona kupa kuyerwa kwepH nekukurumidza uye kwakarurama.
Zvikamu zve pH Meter
Usati wanzwisisa mashandiro emuchina we pH, zvakakosha kuziva zvikamu zvikuru zvemuchina we pH zvinosanganisira electrode ye pH nemuchina wekuyera we electronic.
1. Electrode yepH:
Electrode yepH inowanzogadzirwa negirazi rinonzwa ma hydrogen ions. Ine electrode yakakosha ine gel slurry ine silver chloride (AgCl2). Electrode inoshandiswawo sechiyero chakasimba chekuyera. Ma electrode maviri aya anoshanda pamwe chete kuyera pH yemhinduro.
2. Zvishandiso zvekuyera zvemagetsi:
Chiyero chemagetsi ndicho chinhu chikuru chinoverenga uye chinoratidza pH. Mamita aya anogona kuva nezvimwe zvinhu zvakasiyana-siyana, zvakaita sekugadzirisa otomatiki, kuchengetedza data, uye kutaurirana nekombiyuta kuti iongororwe zvakanyanya.
Nheyo yekushanda ye pH Electrode
Electrode yepH inoshanda pahwaro hwe electrochemistry. Electrode yegirazi inonzwa kuwanda kwema hydrogen ions mu solution . Kana electrode yepH yakaiswa mu solution iri kupimwa, ma hydrogen ions ari mu solution anokanganisa kugona kwe electrode yegirazi. Musiyano uyu unobuda unoyerwa ne electrode ye reference, uye chiratidzo chinobuda chinozoshandurwa kuita pH value ne electronic measuring device.
Nheyo yaNernst
Tsanangura mashandiro eelectrode yepH iyo isingakwanise kuparadzaniswa neMutemo waNernst. Simba reelectrode yegirazi rinogona kutsanangurwa neNernst equation seinotevera:
\[ E = E_0 + \left( \dfrac{RT}{nF} \right) \ln a_{H+} \]
Dimana:
– E ndiyo electrode potential,
– E0 ndiyo electrode potential yakajairika,
– R ndiyo gasi risingaperi rinowanikwa pasi rose (8.314 J/mol·K),
– T ndiyo tembiricha muKelvin,
– n ndiyo nhamba yemaerekitironi anotamiswa mu electrochemical reaction,
– F ndiyo nguva dzose yaFaraday (96485 C/mol),
– aH+ ibasa rehydrogen ions.
Pakuyera pH, basa rehydrogen ion rinowanzo tsiviwa nehuwandu hwehydrogen ion, saka equation inoyera mukana unoshanduka zvichienderana nekuchinja kwepH.
Kuenzanisa uye Kushandisa pH Meter
Kuyera kwakarurama uchishandisa pH meter kunoda kuyera kwakakodzera. Kuyera kunoitwa uchishandisa mhinduro dzakajairwa dzine pH values dzinozivikanwa. Kazhinji, maitiro ekuenzanisa anosanganisira mhinduro mbiri kana kupfuura dze buffer dzine pH values dzakasiyana. Maitiro ekuenzanisa anogona kusiyana zvichienderana ne pH meter model, asi kazhinji anosanganisira matanho anotevera:
1. Kugadzirira kweElectrode:
Maelectrode anofanira kucheneswa nemvura yakacheneswa kuti abvise tsvina kana zvasara kubva mumushonga wekare. Mushure mekusuka nekuomesa, maelectrode anofanira kunyikwa mumushonga webuffer.
2. Kuenzanisa Mapoinzi Zero:
Chiyero chepH chakaiswa kuti chiyere mushonga webuffer une pH isina kusimba (kazhinji pH 7). Chishandiso chinogadziriswazve panzvimbo iyi kuti chive nechokwadi chekuti zero value kana reference point yakarurama.
3. Kuenzanisa Mapoinzi Acids uye Zvigadziko:
Mushure mekugadziriswa kwe zero point, mhinduro ye acidic buffer (kazhinji pH 4) uye mhinduro ye basic buffer (kazhinji pH 10) zvinoshandiswa kugadzirisa nzvimbo yekuenzanisa. Iyo pH meter inozogadziriswa kuti ienderane ne pH value ye buffer. asidhi nezvigadziko.
4. Kuyera:
Mushure mekuongororwa, pH meter inenge yagadzirira kushandiswa kuyera pH yemhinduro isingazivikanwe. Electrode inonyikwa mumuenzaniso wemhinduro, uye pH meter icharatidza pH yakayerwa.
Kushandisa pH Meter
Mamita epH anoshandiswa zvakanyanya muminda yakasiyana-siyana yeindasitiri nekutsvaga ruzivo.
1. Indasitiri yezvekudya nezvinwiwa:
Muindasitiri yechikafu, pH yakakosha pakuona kuti chigadzirwa chakanaka uye chakachengeteka. Kuyerwa kwepH kunodiwa pakuita kuti chive chakasimba, kudzora mhando yezvigadzirwa zvemukaka, zvinwiwa zvinodhaka, uye kuchengetedza.
2. Rabhoritari yeKemistri neBiology:
Murabhoritari, ma pH metres anoshandiswa pakuongorora kwakasiyana-siyana kwemakemikari nehupenyu, kusanganisira pakugadzirira mhinduro dze buffer, ongororo kemesitiri yezvisikwa uye zvinhu zvisina makemikari, pamwe nezvidzidzo zvehupenyu zvakaita sekurima masero.
3. Indasitiri yeMishonga:
Mamita epH anoshandiswa mukutarisa mhando yemishonga, kunyanya kuve nechokwadi chekuti mishonga inogara kwenguva refu uye inoshanda zvakanaka mumamiriro akasiyana-siyana epH.
4. Kurapa Mvura Nezvakatipoteredza:
Mukurapa mvura uye kuongorora nharaunda, mita dzepH dzinoshandiswa kutarisa hunhu hwemvura uye kudzora maitiro ekurapa mvura yakasviba. Izvi zvakakosha pakudzivirira kusvibiswa uye kuchengetedza ecosystem yakaringana.
5. Kurima:
pH yevhu iri zvinhu zvakakosha zvinopesvedzera kukura kwezvirimwa. Nekushandisa muchina we pH, varimi vanogona kutarisa nekugadzirisa pH yevhu kuti ienderane nezvinodiwa nezvirimwa zvavari kurima.
Mhedziso
Pfungwa yekushanda kwe pH meter ndeyekushandisa electrochemistry inoshandisa ma electrodes egirazi kuyera huwandu hwe hydrogen ions mumushonga. Kuongororwa kwakakodzera kwakakosha kuti pave nemhedzisiro chaiyo yekuyera. Kushandiswa kwe pH metres kwakapararira munzvimbo dzakasiyana-siyana, kubva kuindasitiri yezvikafu nezvinwiwa kusvika pakurapa mvura nekurima, zvichiita kuti zvive zvishandiso zvakakosha mune zvakawanda zvesainzi nemaindasitiri. Nekunzwisisa nheyo yekushanda uye mashandisirwo e pH metres, tinogona kunzwisisa kukosha kwechishandiso ichi mumabasa akasiyana-siyana ehupenyu hwemazuva ano.
