The Hanna Instruments team doesn't just want to sell you great instrumentation; we want to work with you to make your product the best it can be. That's why we're constantly creating resources for our customers in all industries.
Our Measuring pH in Wine eBook is designed as a resource for winemakers looking to enhance their measurement approach.
Measuring pH isn't effective unless the data reliably represents the actual condition of your wine. The quality of analytical data depends on proper sampling, appropriate method selection, and effective execution. This guide is designed to help you achieve the required level of accuracy by covering how pH affects wine quality, the necessary tools needed to measure pH, and how to use these tools to get accurate results.
Here is a brief recap of the three sections included in the eBook.
Chapter 1: Why pH Matters
This section covers how accuracy of a pH measurement impacts many stages of wine making such as fermentation, aging, fining, stabilization, and bottling.
Improper calibration, storage, or cleaning of the pH electrode may cause inaccurate readings which will impact the chemistry and sensory perception of the wine. We typically see errors of up to 0.5 pH – enough to result in wine spoilage and serious quality issues.
Chapter 2: What You Need
Chapter two outlines all the equipment needed for an ideal pH measurement set up.
- 2 point calibration
- Temperature compensation
- 0.01 pH resolution
- An mV scale
Good to have
- Calibration check
- Good Laboratory Practices (GLP)
Wine Specific pH Electrode
- PTFE junction & glass body combination.
- Built-in temperature sensor (optional).
- A stirrer should have variable speed control to allow for proper sample mixing. Mixing will ensure a faster electrode response, greater stability, and more accurate measurements.
- An electrode holder will help hold the electrode in the correct position for measurement. A holder also help to avoid damage to the glass pH bulb (it can break when it hits the magnetic stir bar).
- 100 mL sample beakers (2)
- 300 mL waste beakers (2)
- Lab wash bottle with deionized or distilled water (1)
- Calibration ensures the electrode is synced to the meter. Use pH 3.00 and pH 7.01 buffers for optimal results.
- Clogged junctions are the number 1 reason for poor performance in pH measurement. In wine this is particularly important because wine samples (must, juice etc) leave residues on the junction of the pH electrode that will clog it. Hanna makes a cleaning solution specifically designed to clean wine deposits.
- A dry pH electrode is the second most common reason for poor performance in pH measurement. A dry pH bulb slows the exchange of ions (the pH reading), which creates false readings (when you record the pH value because you think it is stable, but it is still drifting). Even worse, a dried out electrode could stop working altogether.
- The filling solution of a pH electrode becomes contaminated through the testing process. Emptying out the filling solution and replacing it with fresh solution will help rejuvenate the electrode making it faster, and more responsive.
Chapter 3: How to Measure
In this section, we show you a step-by-step process for calibrating your electrode and measuring pH while wine making. You will also get the steps needed to properly maintain and store your electrode – a task that's critical for accurate measurement.
Tips in this section include:
- How to prepare your electrode and buffers for calibration.
- How to perform a calibration.
- Taking your measurements.
- Storing the electrode after measuring.
There is even a printable checklist that you can keep in your lab to make sure you never skip a step!
Click the eBook to download it now!
As a leader in innovation Hanna Instruments developed the HALO Wireless pH Meter, which uses Bluetooth Smart Technology to connect to Apple and Android devices running the Hanna Lab App.
Continuing with this tradition, the Hanna Instruments Blog is devoted to sharing the latest in product overviews, how-to guides, and industry specific news to our ever-growing audience.Contact us at email@example.com.