How should I store my pH electrode?

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.

How do you make a pH storage solution?

If you wish to prepare your own storage solution, you can do so by adding 10g of solid potassium chloride (KCl) to 100 mL of a buffer pH 4 solution. It is also a good idea to add some buffer preservative (add 3 drops preservative/100 mLs solution).

What is the pH of Hanna storage solution?

4.01
After cleaning your electrode with one of our wide range of cleaning solutions, rinse with tap water, then soak the electrode in Hanna specially formulated Storage Solution (HI-70300 or HI-80300) before taking measurements. pH 4.01 or pH7.

What is calibration solution?

pH calibration solutions, also called pH buffers, are an essential tool when measuring pH with a pH meter and electrode. Using a high-grade buffer to calibrate your meter before each use is the only tried-and-true way to get the most accurate results every time.

Do pH probes need to be kept wet?

pH meters work by measuring minute particles, called ions, with two glass electrodes, one of which has a permeable junction. Therefore, unlike most instruments, the glass electrodes need to be kept wet with a storage fluid for the junction not to get blocked.

Why we use 3M KCl in pH meter?

Potassium chloride (KCl) acts as a source of chloride ions for the electrode. The advantage of using KCl for this purpose is that it is pH-neutral. Typically, KCl solutions of concentrations ranging from 3 molar to saturated are used in pH meters.

Why KCl is used in pH meter?

Does pH electrode storage solution expire?

pH buffers have a finite shelf life. 2. The expiration date on the bottle is for unopened buffer solution.