Overview
Preserved plum extract is derived from Prunus mume, a species of Asian plum traditionally preserved with salt and herbs. The extract captures the fruit's signature sour-salty profile and bioactive compounds. Industrial extraction methods include water-based or ethanol-assisted techniques, often followed by concentration or spray drying. As a natural flavor enhancer, it has gained popularity in the food and health industries due to its clean-label appeal. Unlike synthetic acids, it provides a complex flavor matrix alongside potential functional benefits, making it valuable for both taste and nutrition applications.
Physical and Chemical Properties
The extract's acidity (pH 2.5-3.5) stems from high concentrations of citric and malic acids, which constitute 30-50% of its soluble solids. Polyphenols like chlorogenic acid contribute to its antioxidant capacity, typically measured at 8,000-12,000 μmol TE/100g by ORAC assays. In powder form, it exhibits hygroscopic properties requiring anti-caking agents for stability. Liquid variants often contain 50-70% soluble solids with a Brix value of 50-60°. The extract's umami character comes from naturally occurring amino acids and nucleotides formed during the plum's fermentation process.
Main Applications
In the food industry, the extract serves as a natural acidulant in snacks, sauces, and ready-to-eat meals, often replacing vinegar or synthetic acids. Beverage manufacturers use it in herbal teas, functional drinks, and alcoholic beverages for its flavor-enhancing and pH-adjusting properties. The supplement market employs it in digestive health products due to its probiotic-supportive acidity. Traditional Chinese Medicine formulations incorporate it for its supposed liver-cleansing and appetite-stimulating effects. Recent R&D explores its potential in sports nutrition for electrolyte balance and oral rehydration solutions.
Safety and Storage
Regarded as safe for consumption, the extract may require dosage adjustments in low-sodium diets due to residual salt content from preservation processes. Industrial users should conduct patch tests when formulating with proteins, as its low pH may cause precipitation. Powdered extracts maintain stability for 24 months when stored below 25°C with <60% humidity. Liquid forms typically have a 12-month shelf life and may require refrigeration after opening. Bulk containers should use food-grade liners to prevent corrosion from the extract's acidity.
B2B Procurement Guide
When sourcing preserved plum extract, verify the supplier's fruit origin—plums from Fujian or Guangdong provinces in China are traditionally preferred. Request certificates for pesticide residues (especially for conventional farming) and sulfur dioxide levels (common in preservation). For functional applications, ask for standardized assays of polyphenol content or antioxidant activity. Consider MOQ requirements: small batches (1-5kg) often cost 30-50% more per unit than bulk orders (100kg+). Container shipments may require temperature control to prevent clumping in powder forms during transit.
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