Dissolving Gellan Gum for Clear Gel
Question
Hello, I purchased both Gellan Gum (High Acyl) and Gellan Gum (Low Acyl). I tried dissolving them in cold water (as per initial recommendation which turned out incorrect) but they did not dissolve well and appeared cloudy. I would like to know how to properly dissolve them and adjust the ratio of High Acyl and Low Acyl types to achieve a clear gel. Thank you.
Answer
How to Dissolve Gellan Gum for a Clear Gel
Thank you for your question regarding dissolving Gellan Gum. You are correct that dissolving Gellan Gum in cold water can result in poor dissolution and cloudiness.
Based on the product information for both Gellan Gum (High Acyl) and Gellan Gum (Low Acyl), the correct method for dissolving Gellan Gum is to heat it in hot water to over 70°C. It is recommended to use deionized water (DI water) for best results.
Once the Gellan Gum is fully dissolved in the hot water, you can then add ions (such as sodium, calcium, potassium, or magnesium, for example, using calcium lactate or sodium lactate) to help thicken the solution and form the gel as it cools down.
Regarding achieving a clear gel:
- Gellan Gum (High Acyl) typically forms a soft, opaque gel.
- Gellan Gum (Low Acyl) typically forms a hard, clear gel.
To get a clear gel, you should primarily use Gellan Gum (Low Acyl) or adjust your ratio to include a higher proportion of Low Acyl compared to High Acyl. While the two types can be used together to adjust texture, using High Acyl will contribute to opacity.
The recommended usage rate for Gellan Gum is typically 0.1-3%, depending on the desired viscosity.
In summary, always dissolve Gellan Gum by heating it in water above 70°C, and use Gellan Gum (Low Acyl) if clarity is your primary goal.
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Gellan Gum (High Acyl)
