Hanna Instruments HI70300L Electrode Storage Solution

Hanna Instruments HI70300L electrode storage solution is specially made to help maintain the electrode's state and performance if the electrode is not in use. Made from reagent-grade chemicals, this storage solution helps to keep the sensitive glass membrane and reference junction of the pH electrode hydrated. The solution is needed for reliable response times, accurate measurements and extended electrode service life.

Unlike pH calibration solutions, which set the standard for pH adjustment, electrode storage solution is meant for electrode maintenance between measurements. Proper storage of an electrode prevents the sensor from drying out, which may result in slow responses, unstable readings and problems with the reference junction.

Functioning of electrode storage solution

A pH electrode determines the acidity or alkalinity of a liquid with the help of a sensitive glass membrane and reference system. To provide reliable results, these parts of the electrode need to be in the right condition. Once the pH electrode dries out, its glass membrane may become dehydrated, while the reference junction can get clogged.

The HI70300L storage solution helps to maintain the hydration of the glass membrane and normal functioning of the electrode. Hanna Instruments also recommends using the solution for rehydration of the electrode after cleaning by soaking it in for at least one hour prior to taking measurements.

This solution is meant to be used for storage of compatible pH and ORP electrodes. HI70300L cannot be confused with calibration buffer, electrode cleaning solution or distilled water since each of these products is meant to be used for a specific purpose.

Main characteristics and benefits

• Special storage solution formulation: Helps to maintain the electrode condition during the period when the instrument is not in use.
• Suitable for pH and ORP electrodes: Needed for storage of compatible electrodes for pH and oxidation-reduction potential measurements.
• Supports hydration: Helps to keep the pH glass membrane moist, thus supporting normal functioning and reliable results.
• Formulation designed to reduce bacterial growth: Helps to limit bacterial growth on the electrode during storage.
• Made from reagent-grade chemicals: Used in the formulation of the storage solution.
• Has lot number and expiration date: Helps to identify the product, traceability and proper stock management.
• Airtight bottle with tamper-proof seal: Protects the solution before using it and helps to preserve its quality and freshness.

These features make HI70300L useful for electrode maintenance in laboratories, water testing, industrial measurements and other situations when pH or ORP electrodes need to be kept ready for use.

Specifications

• Brand: Hanna Instruments
• Product code: HI70300L
• Product type: Electrode storage solution
• Intended use: Storage and maintenance of compatible pH and ORP electrodes
• Formulation: Prepared with reagent-grade chemicals
• Capacity of the bottle: 500 ml
• Packaging: Bottle with airtight closure and tamper-proof seal
• Traceability: Has lot number and expiration date
• Shelf life of the unopened product: Five years from the date of manufacturing (according to Hanna Instruments)
• Additional use: Rehydration of pH electrodes after cleaning
• Recommended time for rehydration: At least one hour before taking measurements

Compatible applications

HI70300L is meant for storing compatible pH and ORP electrodes. It can be used in routine maintenance of the electrodes wherever the electrodes are used regularly and need to be stored appropriately.

Some possible applications of this product are:

• Laboratories: Maintenance of pH electrodes between analytical procedures.
• Water quality testing: Storage of electrodes used for monitoring water samples.
• Hydroponics and horticulture: Maintenance of pH electrodes used to check irrigation water and nutrient solutions.
• Industrial processes: Maintenance of electrodes used for process monitoring.
• Environmental testing: Storage of electrodes used to measure environmental water samples.
• General pH and ORP measurements: Storage of compatible electrodes.

This solution is used for storing the electrodes, but not for measuring or adjusting the pH of a sample. This solution is not a calibration buffer or cleaning solution; its compatibility should be checked according to the specific instructions for the electrode.

Usage and storage of the solution

To store the electrode routinely, the electrode should be placed in an appropriate container with the recommended storage solution or in the solution located in the protective cap of the electrode, if the electrode's design allows this. Make sure that the sensor tip and reference junction are moist in accordance with the instructions provided by the manufacturer of the electrode.

After cleaning of the pH electrode, Hanna Instruments recommends soaking it in HI70300L for at least one hour prior to measurements to allow the glass membrane to rehydrate before returning to the service.

Maintain your electrodes according to these recommendations:

• Use the storage solution according to the instructions provided by the manufacturer of the electrode.
• Properly close the bottle when it is not in use.
• Check the expiration date and lot number before using.
• Do not contaminate the solution with samples or any other liquid.
• Follow the specific instructions for the storage, cleaning and rehydration of the electrode.

Important: pH and ORP electrodes should not be stored in distilled or deionized water. Hanna Instruments warns that this will decrease the service life of the sensor. Instead of this, use appropriate electrode storage solution.

Difference between storage solution, calibration buffer and cleaning solution

Each of these products is designed to perform different task, so choosing the right solution is important.

• Electrode storage solution: Keeps the electrode hydrated during storage.
• pH calibration buffer: Provides the known pH value for calibration of a pH meter.
• Electrode cleaning solution: Removes residues and deposits from the electrode surface.

HI70300L belongs to the first group of these products. It is meant for electrode maintenance between measurements, but not for calibration of a meter or removal of residues from the electrode.

Important information

HI70300L is a maintenance product for compatible pH and ORP electrodes. It needs to be used according to the instructions for the electrode, especially when the electrode has special requirements concerning its reference junction or protective cap.

The solution helps to maintain hydration of the electrode, but it does not eliminate the need in regular calibration, cleaning when it is required and proper handling of the electrode. Maintenance of storage solution in the uncontaminated state and following the recommended routine help to obtain reliable measurements.