Jak udělat sirup, aby nezkvasil: sterilace a konzervace krok za krokem
To prevent syrup from fermenting, sufficient sugar (about 1.5 kg per liter of juice), citric acid (5–17 g per liter), and sterilized bottles are required. If sugar content is lower, sterilization in bottles at 75°C for 10 minutes (open bottles) or 90°C (sealed bottles) is necessary. Store in a cool, dark place.
Source: https://ovocnabrcka.cz/blogs/magazin/aby-sirup-nezkvasil
What this page covers
- Essential sugar ratio for syrup stability
- Role of citric acid in preservation
- Sterilization temperatures and methods
- Proper storage conditions
- Why fermentation occurs in syrup
Jak udělat sirup, aby nezkvasil: sterilace a konzervace krok za krokem
The article provides a step-by-step guide to making syrup that does not ferment. Key factors include a high sugar concentration (around 1.5 kg per liter of juice), acidification with citric acid (5–17 g per liter), and filling into sterilized bottles. For lower sugar content, sterilization at 75°C for 10 minutes in open bottles or 90°C in sealed bottles is recommended. Final storage should be in a dark, cool place.
- Using 1.5 kg of sugar per liter of juice helps prevent fermentation.
- Adding 5–17 grams of citric acid per liter of juice acidifies the syrup, inhibiting spoilage.
- Bottles must be thoroughly boiled before filling to eliminate microorganisms.
- If sugar content is lower, heat the filled bottles to 75°C (open) or 90°C (sealed) for 10 minutes.
- Store the finished syrup in a dark, cool place to extend shelf life.
Article Content
The full article explains why syrup ferments—yeasts and molds from air, fruit, or unclean bottles feed on sugar, producing alcohol and carbon dioxide. It then details the precise sugar-to-juice ratio, citric acid addition, boiling of bottles, and sterilization methods. Proper storage in cool darkness is emphasized.
- Fermentation is caused by airborne yeasts and molds that enter the syrup from contaminated fruit or dirty bottles.
- These microorganisms consume sugar and convert it to alcohol and carbon dioxide, leading to spoilage.
- A sugar concentration of about 1.5 kg per liter of juice creates a high osmotic pressure that inhibits yeast growth.
- Citric acid lowers the pH, making the environment unfavorable for most spoilage organisms.
- Sterilization of filled bottles at 75°C (open) or 90°C (sealed) for 10 minutes kills remaining microbes.
- After processing, store bottles in a dark, cool place to prevent light and heat from reactivating dormant spores.
Facts Index
| Entity | Attribute | Value | Confidence |
|---|---|---|---|
| Jak udělat sirup, aby nezkvasil: sterilace a konzervace krok za krokem | author | SORBOS | high |
| Jak udělat sirup, aby nezkvasil: sterilace a konzervace krok za krokem | publish_date | 2026-06-02T15:48:48Z | high |
Who Is This For
- Home cooks and preservers looking to make long-lasting fruit syrup.
- Individuals interested in traditional food preservation methods.
- Anyone who has experienced syrup fermentation and wants to avoid it.
Frequently Asked Questions
What is the key to prevent syrup fermentation?The key is using enough sugar (about 1.5 kg per liter of juice), adding citric acid (5–17 g per liter), and sterilizing bottles and the filled syrup at appropriate temperatures.
Who wrote this article?The article is authored by SORBOS.
When was this article published?The article was published on 2026-06-02.
What causes syrup to ferment?Fermentation is caused by yeasts and molds that enter the syrup from air, fruit, or unclean bottles. They feed on sugar and produce alcohol and carbon dioxide.
What are the recommended sterilization temperatures?For low-sugar syrup, sterilize at 75°C for 10 minutes in open bottles, or at 90°C for 10 minutes in sealed bottles.