Hanna Instruments HI-70300-012 GroLine Storage Solution for pH electrodes, 120ml
HI-70300-012 is a 120mL bottle of GroLine storage solution prepared with reagent grade chemicals that can be used to ensure optimum performance of your pH and ORP electrodes.
It is necessary to store a pH electrode in a solution in order to keep the glass membrane of the pH electrode hydrated. Ideally a storage solution should be used; never store an electrode in distilled or deionised water. The Hanna Instruments storage solution is specifically formulated to minimise microbial growth and to prevent any diffusion/osmotic effects from storing a probe in a solution with the highly concentrated inner reference electrolyte. Storing your pH and/or ORP electrodes in a storage solution will also keep the junction clear.
Maintaining the hydrated layer and clear junction will help to ensure a fast and reliable measurement. In the case of cleaning your pH electrode in one of our cleaning solutions, we recommend soaking the electrode in the HI-7061-012 GroLine storage solution for at least one hour before taking measurements.
* Never store pH or ORP electrodes in distilled or deionised water. Doing so will shorten the life of the sensor.
Key Features
- Special formulation to minimise microbial growth and osmotic/diffusion effects between the solution and inner reference electrolyte
- Manufactured specifically for pH and ORP electrodes
- Air tight bottle with tamper-proof seal to ensure the quality and freshness of solution
Each bottle marked with lot number and expiry date and specially formulated to have an expiry of 5 years from manufacture for an unopened bottle.
Hanna recommends using HI-7061-023 Groline General Purpose Cleaning Solution alongside this product.
Specifications
| Description | electrode storage solution |
| Package | bottles |
| Size | 120 mL |
| Quantity | 1 |
| Certificate of Analysis | No |
Frequently Asked Questions
Clear answers to help you choose the right water testing solution with confidence
Which brands of water testing kits do you supply?
Do you provide kits for both home and professional use?
Yes — whether you’re a pool or spa owner, aquarium keeper, utility company, or a university laboratory, we have the right solution for your needs.
Can I arrange servicing or calibration for my photometer?
Absolutely. We also provide servicing and calibration to keep your photometers accurate and reliable.
How quickly do you dispatch orders?
Orders placed before 2:30 pm (Monday–Friday) are dispatched the same day. We also ship on Saturdays for your convenience.
Which couriers do you use for delivery?
We deliver through UPS, DPD, and Royal Mail. You can also choose to upgrade to next-day delivery at checkout.
What is your return policy?
We accept returns within 14 days of delivery provided the items are unused, in their original packaging, and in resalable condition. Please contact our team before returning any items.
Can I place bulk or business orders?
Yes, we welcome bulk, trade, and institutional orders. For tailored pricing or large quantities, please get in touch with us directly.
How can I get help if I’m unsure which kit to buy?
You can call us at 📞 +44 (0)115888 2726 and our team will guide you in choosing the most suitable kit for your needs.