why we are putting ph electrode in potassium chloride solution?

Question

Iam working in a bioanalytical area i would like toknow the answer for this question.

Answer 1

Electrode Storage :
Always keep your pH electrode moist. We recommend that you store your electrode in a solution of 4 M KCl. If 4 M KCl is not available, use a pH 4 or 7 buffer solution. DO NOT store electrode in distilled or deionized water—this will cause ions to leach out of the glass bulb and render your electrode useless.

After storage, you may notice white KCl crystals forming outside your electrode. This will not interfere with measurements. Simply rinse the electrode and blot dry before use.

Answer 2

Potassium Chloride Ph

Answer 3

The presence of concentrated KCl solution keeps the ionic conductivity of the glass membrane in good condition. The conductivities of K+ and Cl- ions are the same.
KCl is not a buffer solution, and is never used to calibrate the pH electrode, but is used to keep it working properly - it keeps the glass full of ions.

Answer 4

pH meter is a special type of potentiometer. It measures potential (Concentration) of H+ ions in the solution, through a sensitive glass membrane. To keep this glass membrane active it requires to be kept in contact of mild acid solution (preferred pH between 4 and 6) of electrolyte solution. Alkali will damage the glass - strong alkali will the glass membrane, and Strong acid will convert Glass into inactive Silica.

Answer 5

KCl is a neutral salt (soln has pH 7) it thus helps to calibrate the pH Meter.