Working & Calibration of pH Meter | How to Determine pH by Digital pH Meter | Digital pH Meter

A pH meter is used to determine the acidity or alkalinity of the solution. pH is the concentration of hydrogen ions in the solution. A solution containing more H+ ions remains acidic while the solution containing more OH- ions remains alkaline. pH value of solutions ranges from 1 to 14.

pH electrodeSolution having pH value 1 will be the highly acidic and with pH value 14 will be highly basic. The acidity and alkalinity of any solution depends upon the concentration of hydrogen ions (H+) and hydroxyl ions (OH-) respectively. A neutral solution as pure water has pH 7.

pH meter is used to determine the pH of different solutions in pharmaceuticals. It is more accurate method then the pH strip. A pH meter contains a pH probe that passes the electrical signals to the pH meter and pH meter displays the pH value of the solution.

The glass pH probe contains two electrodes, a sensor electrode and a reference electrode. These electrodes are in the form of glass tubes one contains pH 7 buffer and other contains saturated potassium chloride solution. The sensor electrode bulb is made up of porous glass or permeable glass membrane coated with silica and metal salts. A silver wire coated with silver chloride is immersed in pH 7 buffer in the bulb. Another silver wire coated with silver chloride is immersed in the saturated potassium chloride solution in reference electrode.

When the probe is placed in a solution to measure the pH, hydrogen ions accumulate around the bulb and replace the metal ions from the bulb. This exchange of ions generates some electric flow that is captured by the silver wire. The voltage of this electric flow is measured by the pH meter by converting it into pH value by comparing the generated voltage with the reference electrode.

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[ASRAFULISLAM-jkup]

Your teaching process is very very nice ma'am

[qasimziasiprawsamachanel]

Respected Mam your method to calibrate PH- metre is outstanding. Remarkable. Stay blessed always respected Mam 📚🌹✍️

[Dailyopedia]

tysm mam very helpful m watching before my exams

[ShrutiSharma-yuik]

Excellent. Mam one video like this on working of calorimeter

[gaurisonarikar]

Thank you so much for this video ... Due to covid there is no practical because of which we can learn things practically... Because of you video it is very easy to learn .... Again thank you 🙏

[ASRAFULISLAM-jkup]

Ma'am very nice and excellent explanation

[singluramkowachi]

Thank you ma'am video is helpful ✌️👍❤

[amanchadar]

Thank you mam this video is very helpful.

[pasuladilip]

Super explanation mam, , easy understanding

[pharmacyhangama]

Mem mst banaye h by brd medical college gkp student

[raviprajapati]

Calibration of ph meter/sensor video outstanding mam'.
Without ph meter, ph sensor kese check kar sakte hai, please help.

[ajitpatil]

थोडा धिरेसे बोलो ना ... पुरा विडीओ मुझे आज रुकाकर देखना पडा और... PH कँलिब्रेशन किया.... बहोत फास्ट बोल रही हो.. thanks

[khushimaurya]

Thanks you so much ma'am very helpful Vedio

[mahnoorriazkhan]

Thankyou so much. It is explained very well.

[angadsingh]

Thank you mam for your effort. But one query . How standard (pH 11) should be calibrated by which button is use.

[piyaadhikari]

Ma'am while using standard buffer of pH 4, why slope knob is used and why not calibration knob?

[shivamdixit]

Please make a video class on the conductivity meter

[ShivKumar-rkm]

Temperature room temperature ke according set krte h kya ph- meter me

[divyagupta]

Please also upload video on calorimeter