Dear Mojtaba,

A similar question to yours has already been posted before on ResearchGate. Here are the links where you can possibly find the answer to your question.

https://www.researchgate.net/post/What_is_the_best_and_reliable_method_to_determine_point_of_zero_charge_pHpzc

https://www.researchgate.net/post/What_is_the_exact_procedure_for_measuring_pHzpc_using_the_pH_drift_method 

With my best regards

Prof. Bachir ACHOUR

Dear Mojtaba,

A similar question to yours has already been posted before on ResearchGate. Here are the links where you can possibly find the answer to your question.

https://www.researchgate.net/post/What_is_the_best_and_reliable_method_to_determine_point_of_zero_charge_pHpzc

https://www.researchgate.net/post/What_is_the_exact_procedure_for_measuring_pHzpc_using_the_pH_drift_method 

With my best regards

Prof. Bachir ACHOUR

 Hi

thanks prof.

with regard.

m. sasani

Determination of Zero Point Charge (pHzpc)

The pH at the potential of zero point charge (pHzpc) of the sample was measured using the pH drift method.  The pH of a solution of 0.01 M NaCl was adjusted between 1 and 12 by adding either HCl or NaOH.  Nitrogen was bubbled through the solution at 25oC to remove dissolved carbon dioxide until the initial pH stabilizes.  Sample  (0.15 g) was added to 50 mL of the solution.  After the pH had stabilized (after

24 hours), the final pH was recorded.  The graph of final pH versus initial pH  was used to determine the point at which the initial pH and final pH values were equal.  This was taken as the pHzpc of the sample.

Hi dr.sivamani

thanks for your answer.

with regard

M. Sasani

Dear Mojtaba,

PH of Point Zero Charge (PH pzc) is one of the most important indicators with respect to the material's chemical characteristics. In the following manuscript, I have fully explained the process for PH pzc determination, step-by-step (please navigate to section 2.2.2) :

https://ubir.buffalo.edu/xmlui/handle/10477/78502

Hope you find it useful,

Ramin